View HCS512T-ISOC23_3808170.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

? 2011 microchip technology inc. ds40151e-page 1 hcs512 features security ? secure storage of manufacturer?s code ? secure storage of transmitter?s keys ? up to four transmitte rs can be learned ?k ee l oq ? code hopping technology ? normal and secure learning mechanisms operating ? 4.0v ? 6.0v operation ? 4 mhz external rc oscillator ? learning indication on lrnout ? auto baud rate detection ? power saving sleep mode other ? stand-alone decoder ? on-chip eeprom for transmitter storage ? four binary function outputs?15 functions ? 18-pin dip/soic package typical applications ? automotive remote entry systems ? automotive alarm systems ? automotive immobilizers ? gate and garage openers ? electronic door locks ? identity tokens ? burglar alarm systems compatible encoders all k ee l oq encoders and transponders configured for the following setting: ? pwm modulation format (1/3-2/3) ?t e in the range from 100 s to 400 s ? 10 x t e header ? 28-bit serial number ? 16-bit synchronization counter ? discrimination bits equal to serial number 8 lsbs ? 66- to 69-bit length code word. description the microchip technology inc. hcs512 is a code hop- ping decoder designed for secure remote keyless entry (rke) systems. the hcs512 utilizes the pat- ented k ee l oq code hopping system and high security learning mechanisms to make this a canned solution when used with the hcs encoders to implement a uni- directional remote keyless entry system. package type block diagram the manufacturer?s code, transmitter keys, and syn- chronization information are stored in protected on- chip eeprom. the hcs512 uses the data and clk inputs to load the manufacturer?s code which cannot be read out of the device. hcs512 pdip, soic 1 2 3 4 5 6 7 8 9 lrnin lrnout nc mclr gnd s0 s1 s2 s3 18 17 16 15 14 13 12 11 10 rfin nc oscin osc out v dd data clk sleep v low s0 s1 s3 s2 v low reception register eeprom control decryptor output rfin oscillator oscin control lrnout data clk lrnin mclr sleep k ee l oq ? code hopping decoder
hcs512 ds40151e-page 2 ? 2011 microchip technology inc. the hcs512 operates over a wide voltage range of 3.0 volts to 6.0 volts. th e decoder employs automatic baud rate detection which allows it to compensate for wide variations in transmitter data rate. the decoder contains sophisticated error checking algorithms to ensure only valid codes are accepted. 1.0 system overview key terms the following is a list of key terms used throughout this data sheet. for additional information on k ee l oq and code hopping, refer to technical brief 3 (tb003). ? rke - remote keyless entry ? button status - indicates what button input(s) activated the transmission. encompasses the 4 button status bits s3, s2, s1 and s0 (figure 8-2). ? code hopping - a method by which a code, viewed externally to the system, appears to change unpredictably each time it is transmitted. ? code word - a block of data that is repeatedly transmitted upon button activation (figure 8-1). ? transmission - a data stream consisting of repeating code words (figure 8-1). ? crypt key - a unique and secret 64-bit number used to encrypt and decrypt data. in a symmetri- cal block cipher such as the k ee l oq algorithm, the encryption and decryption keys are equal and will therefore be referred to generally as the crypt key. ? encoder - a device that generates and encodes data. ? encryption algorithm - a recipe whereby data is scrambled using a crypt key. the data can only be interpreted by the respective decryption algorithm using the same crypt key. ? decoder - a device that decodes data received from an encoder. ? decryption algorithm - a recipe whereby data scrambled by an encryption algorithm can be unscrambled using the same crypt key. ? learn ? learning involves the receiver calculating the transmitter?s appropriate crypt key, decrypting the received hopping code and storing the serial number, synchronization counter value and crypt key in eeprom. the k ee l oq product family facil- itates several learning strategies to be imple- mented on the decoder. the following are examples of what can be done. - simple learning the receiver uses a fixed crypt key, common to all component s of all systems by the same manufacturer, to decrypt the received code word?s encrypted portion. - normal learning the receiver uses information transmitted during normal operation to derive the crypt key and decrypt the received code word?s encrypted portion. - secure learn the transmitter is activated through a special button combination to tr ansmit a stored 60-bit seed value used to ge nerate the transmitter?s crypt key. the receiver uses this seed value to derive the same crypt key and decrypt the received code word?s encrypted portion. ? manufacturer?s code ? a unique and secret 64- bit number used to generate unique encoder crypt keys. each encoder is programmed with a crypt key that is a function of the manufacturer?s code. each decoder is programmed with the manufac- turer code itself. 1.1 hcs encoder overview the hcs encoders have a small eeprom array which must be loaded with seve ral parameters before use. the most important of these values are: ? a crypt key that is generated at the time of pro- duction ? a 16-bit synchronization counter value ? a 28-bit serial number which is meant to be unique for every encoder the manufacturer programs the serial number for each encoder at the time of pro duction, while the ?key gen- eration algorithm? generates the crypt key (figure 1-1). inputs to the key generation al gorithm typically consist of the encoder?s serial number and a 64-bit manufac- turer?s code, which the manufacturer creates. note: the manufacturer code is a pivotal part of the system?s overall security. conse- quently, all possible precautions must be taken and maintained for this code.
? 2011 microchip technology inc. ds40151e-page 3 hcs512 figure 1-1: creation and storage of crypt key during production the 16-bit synchronization c ounter is the basis behind the transmitted code word changing for each transmis- sion; it increments each time a button is pressed. due to the code hopping algorithm?s complexity, each incre- ment of the synchronization value results in greater than 50% of the bits changing in the transmitted code word. figure 1-2 shows how the key values in eeprom are used in the encoder. once the encoder detects a button press, it reads the button inputs and updates the syn- chronization counter. the synchronization counter and crypt key are input to the encryption algorithm and the output is 32 bits of encrypt ed information. this data will change with every button press, its value appearing externally to ?randomly hop around?, hence it is referred to as the hopping portion of the code word. the 32-bit hopping code is combined with the button information and serial number to form the code word transmitted to the receiver. the code word format is explained in greater detail in section 8.2. a receiver may use any type of controller as a decoder, but it is typically a microcontroller with compatible firm- ware that allows the decoder to operate in conjunction with an hcs512 based transmitter. section 5.0 provides detail on integrating the hcs512 into a sys- tem. a transmitter must first be ?learned? by the receiver before its use is allow ed in the system. learning includes calculating the transmitter?s appropriate crypt key, decrypting the received hopping code and storing the serial number, synchronization counter value and crypt key in eeprom. in normal operation, each received message of valid format is evaluated. the serial number is used to deter- mine if it is from a learned transmitter. if from a learned transmitter, the message is decrypted and the synchro- nization counter is verified. finally, the button status is checked to see what operation is requested. figure 1-3 shows the relationship between some of the values stored by the receiver and the values received from the transmitter. figure 1-2: building the transmitted code word (encoder) transmitter manufacturer?s serial number code crypt key key generation algorithm serial number crypt key sync counter . . . hcs512 production programmer eeprom array button press information eeprom array 32 bits encrypted data serial number transmitted information crypt key sync counter serial number k ee l oq ? encryption algorithm
hcs512 ds40151e-page 4 ? 2011 microchip technology inc. figure 1-3: basic operation of receiver (decoder) note: circled numbers indicate the order of execution. 2.0 pin assignment pin decoder function i/o (1) buffer type (1) description 1lrnin i ttl learn input - initiates learning, 10k pull-up required on input 2 lrnout o ttl learn output - indicates learning 3 nc ? ttl do not connect 4mclr i st master clear input 5 ground p ? ground connection 6 s0 o ttl switch 0 7 s1 o ttl switch 1 8 s2 o ttl switch 2 9 s3 o ttl switch 3 10 v low o ttl battery low indication output 11 sleep i ttl connect to rfin to allow wake-up from sleep 12 clk i/o ttl/st (2) clock in programming mode and synchronous mode 13 data i/o ttl/st (2) data in programming mode and synchronous mode 14 v dd p ? power connection 15 osc out (1mh z ) o ttl oscillator out (test point) 16 osc in (4mhz) i st oscillator in ? recommended values 4.7 k and 22 pf 17 nc ? ? 18 rfin i ttl rf input from receiver note 1: p = power, i = in, o = out, and st = schmitt trigger input. 2: pin 12 and pin 13 have a dual purpose. after reset, these pins are used to determine if programming mode is selected in which case they are the clock and data lines. in normal operation, they are the clock and data lines of the synch ronous data output stream. button press information eeprom array manufacturer code 32 bits of encrypted data serial number received information decrypted synchronization counter check for match sync counter serial number k ee l oq ? decryption algorithm 1 3 4 check for match 2 perform function indicated by button press 5 crypt key
? 2011 microchip technology inc. ds40151e-page 5 hcs512 3.0 description of functions 3.1 parallel interface the hcs512 activates the s3, s2, s1 & s0 outputs when a new valid code is received. the outputs will be activated for approximately 500 ms. if a repeated code is received during this time, the output extends for approximately 500 ms. 3.2 serial interface the decoder has a pwm/synchronous interface con- nection to microcontrollers with limited i/o. an output data stream is generated when a valid transmission is received. the data stream consists of one start bit, four function bits, one bit for battery status, one bit to indicate a repeated transmission, two status bits, and one stop bit. (table 3-1). the data and clk lines are used to send a synchronous event message. a special status message is transmitted on the second pass of learn. this allows the controlling microcon- troller to determine if the learn was successful (result = 1) and if a previous transmitter was overwritten (overwrite = 1). the status message is shown in figure 3-2. table 3-1 show the values for tx1:0 and the number of transmitters learned. table 3-1: status bits figure 3-1: data output format figure 3-2: status message format a 1-wire pwm or 2-wire synchronous interface can be used. in 1-wire mode, the data is tr ansmitted as a pwm signal with a basic pulse width of 400 s. in 2-wire mode, synchronous mode pwm bits start on the rising edge of the clock, and the bits must be sampled on the falling edge. the start bit is a ?1? and the stop bit is ?0?. figure 3-2: pwm output format (1) note: the decoder output pwm format logic (?1? / ?0?) is reversed with respect of the encoder modulation format. tx1 tx0 number of transmitters 00 one 01 two 10 three 1 1 four start s3 s2 s1 s0 v low tx1 tx0 stop repeat start 0 0 0 0 result tx1 tx0 stop ovrwr s3 start s2 s1 s0 v low rpt reserved reserved stop 1200 s clk data logic ?1? logic ?0? 600 s 1200 s 1/31/3 1/3
hcs512 ds40151e-page 6 ? 2011 microchip technology inc. 4.0 decoder operation 4.1 learning a transmitter to a receiver either the serial number-based learning method or the seed-based learning method can be selected. the learning method is selected in the configuration byte. in order for a transmitter to be used with a decoder, the transmitter must first be ?learned?. when a transmitter is learned to a decoder, the decoder stores the crypt key, a check value of the serial number and current syn- chronization value in eeprom. the decoder must keep track of these values for every transmitter that is learned. the maximum number of transmitters that can be learned is four. the decoder must also contain the manufacturer?s code in order to learn a transmitter. the manufacturer?s code will typically be the same for all decoders in a system. the hcs512 has four memory slots. after an ?erase all? procedure, all the memory sl ots will be cleared. erase all is activated by taking lrnin low for approximately 10 seconds. when a new transmitter is learned, the decoder searches for an empty memory slot and stores the transmitter?s information in that memory slot. when all memory slots are full, the decoder randomly over- writes existing transmitters. 4.1.1 learning procedure learning is activated by taking the lrnin input low for longer than 64 ms. this input requires an external pull- up resistor. to learn a new transmitter to the hcs512 decoder, the following sequence is required: 1. enter learning mode by pulling lrnin low for longer than 64 ms. the lrnout output will go high. 2. activate the transmit ter until the lrnout out- put goes low indicating reception of a valid code (hopping message). 3. activate the transmitter a second time until the lrnout toggles for 4 seconds (in secure learning mode, the seed transmission must be transmitted during the second stage of learn by activating the appropriate buttons on the trans- mitter). if lrnin is taken low momentarily during the learn status indication, the indication will be ter- minated. once a successful learning sequence is detected, the indication can be terminated allowing quick learning in a manufacturing setup. 4. the transmitter is now learned into the decoder. 5. repeat steps 1-4 to learn up to four transmitters. 6. learning will be terminated if two non-sequential codes were received or if two acceptable codes were not decoded within 30 seconds. the following checks are performed on the decoder to determine if the transmission is valid during learn: ? the first code word is checked for bit integrity. ? the second code word is checked for bit integrity. ? the hopping code is decrypted. ? if all the checks pass, the serial number and syn- chronization counters are stored in eeprom memory. figure 4-1 shows a flow chart of the learn sequence. figure 4-1: learn sequence enter learn mode wait for reception of second compare discrimination value with serial number use generated key to decrypt equal serial number check value synchronization counter ? exit learn successful. store: learn unsuccessful no yes wait for reception of a valid code non-repeated valid code generate key from serial number or seed value crypt key
? 2011 microchip technology inc. ds40151e-page 7 hcs512 4.2 validation of codes the decoder waits for a tr ansmission and checks the serial number to determine if the transmitter has been learned. if learned, the decoder decrypts the encrypted portion of the transmission using the crypt key. it uses the discrimination bits to determine if the decryption was valid. if everything up to this point is valid, the synchronization value is evaluated. 4.3 validation steps validation consists of the following steps: ? search eeprom to find the serial number check value match ? decrypt the hopping code ? compare the 10 bits of discrimination value with the lower 10 bits of serial number ? check if the synchronization counter falls within the first synchronization window. ? check if the synchronization counter falls within the second synchronization window. ? if a valid transmission is found, update the syn- chronization counter, else use the next transmitter block and repeat the tests. figure 4-2: decoder operation ? transmission received does ser # check val match ? decrypt transmission is decryption valid ? is counter within 16 ? is counter within 32k ? update counter execute command save counter in temp location start no no no no yes yes yes yes yes no and
hcs512 ds40151e-page 8 ? 2011 microchip technology inc. 4.4 synchronization with decoder (evaluating the counter) the k ee l oq technology patent scope includes a sophisticated synchronizati on technique that does not require the calculation and st orage of future codes. the technique securely blocks invalid transmissions while providing transparent resynchronization to transmitters inadvertently activated aw ay from the receiver. figure 4-3 shows a 3-partition, rotating synchronization window. the size of each window is optional but the technique is fundamental. each time a transmission is authenticated, the intended function is executed and the transmission's synchronization counter value is stored in eeprom. from th e currently stored counter value there is an initial "single operation" forward win- dow of 16 codes. if the difference between a received synchronization counter and the last stored counter is within 16, the intended function will be executed on the single button press and the new synchronization coun- ter will be stored. storing the new synchronization counter value effectively rota tes the entire synchroniza- tion window. a "double operation" (resynchronization) window fur- ther exists from the single operation window up to 32k codes forward of the curren tly stored counter value. it is referred to as "double operation" because a trans- mission with synchronization c ounter value in this win- dow will require an additional, sequential counter transmission prior to executing the intended function. upon receiving the sequential transmission the decoder executes the intend ed function and stores the synchronization counter valu e. this resynchronization occurs transparently to the user as it is human nature to press the button a second ti me if the first was unsuc- cessful. the third window is a "blocked window" ranging from the double operation window to the currently stored synchronization counter value. any transmission with synchronization counter value within this window will be ignored. this window excludes previously used, perhaps code-grabbed transmissions from accessing the system. figure 4-3: synchronization window 4.5 sleep mode the sleep mode of the hcs 512 is used to reduce current consumption when no rf input signal is pres- ent. sleep mode will only be effective in systems where the rf receiver is relatively quiet when no signal is present. during sleep, the clock stops, thereby sig- nificantly reducing the operating current. sleep mode is enabled by the sleep bit in the configuration byte. the hcs512 wi ll enter sleep mode when: ? the rf line is low ? after a function output is switched off ? learn mode is terminated (time-out reached) the device will not ent er sleep mode when: ? a function output is active ? learn sequence active ? device is in programming mode the device will wake-up from sleep when: ? the sleep input pin changes state ? the clock line changes state note: the synchronization method described in this section is only a typical implementation and because it is usually implemented in firmware, it can be altered to fit the needs of a particular system. blocked entire window rotates to eliminate use of previously used codes single operation window window (32k codes) (16 codes) double operation (resynchronization) window (32k codes) stored synchronization counter value note: during sleep mode the clk line will change from an output line to an input line that can be used to wake-up the device. connect clk to lrnin via a 100k resistor to reliably enter the learn mode whenever sleep mode is active.
? 2011 microchip technology inc. ds40151e-page 9 hcs512 5.0 integrating the hcs512 into a system the hcs512 can act as a stand-alone decoder or be interfaced to a microcontroller. typical stand-alone applications include garage door openers and elec- tronic door locks. in sta nd-alone applic ations, the hcs512 will handle learning, reception, decryption, and validation of the received code; and generate the appropriate output. for a garage door opener, the hcs512 input will be connected to an rf receiver, and the output, to a relay driver to connect a motor control- ler. typical systems where the hcs512 will be connected to a microcontroller include vehicle and home security systems. the hcs512 input will be connected to an rf receiver and the function outputs to the microcontroller. the hcs512 will handle all the decoding functions and the microcontroller, all the system functions. the serial output mode with a 1- or 2-wire interface can be used if the microcontroller is i/o limited. 6.0 decoder programming the pg306001 production programmer will allow easy setup and programming of the configuration byte and the manufacturer?s code. 6.1 configuration byte the configuration byte is used to set system configura- tion for the decoder. the lrn bits determine which algorithm (decrypt or xor) is used for the key genera- tion. sc_lrn determines whether normal learn (key derived from serial number) or secure learn (key derived from seed value) is used. table 6-1: configuration byte table 6-2: learn method lrn0, lrn1 definitions bit name description 0 lrn0 learn algorithm select 1 lrn1 not used 2 sc_lrn secure learn enable (1 = enabled) 3 sleep sleep enable (1 = enabled) 4 res1 not used 5 res2 not used 6 res3 not used 7 res4 not used lrn0 description 0 decrypt algorithm 1 xor algorithm
hcs512 ds40151e-page 10 ? 2011 microchip technology inc. 6.2 programming the manufacturer?s code the manufacturer?s code must be programmed into eeprom memory through the synchronous program- ming interface using the data and clk lines. provision must be made for connections to these pins if the decoder is going to be programmed in circuit. programming mode is activated if the clk is low for at least 1 ms and then goes high within 64 ms after power- up, stays high for longer than 8 ms but not longer than 128 ms. after entering programming mode the 64-bit manufacturer?s code, 8-bit configuration byte, and 8-bit checksum is sent to the de vice using the synchronous interface. after receiving the 80-bit message the check- sum is verified and the information is written to eeprom. if the programming operation was success- ful, the hcs512 will respond with an acknowledge pulse. after programming the manufacturer?s code, the hcs512 decoder will automatically activate an erase all function, removing all transmitters from the system. 6.3 download format the manufacturer?s code and configuration byte must be downloaded least significant byte, least signifi- cant bit first as shown in table 6-3. 6.4 checksum the checksum is used by the hcs512 to check that the data downloaded was correctly received before pro- gramming the data. the checksum is calculated so that the 10 bytes added together (discarding the overflow bits) is zero. the checksum can be calculated by add- ing the first 9 bytes of data together and subtracting the result from zero. throughout the calculation the over- flow is discarded. given a manufacturer?s code of 01234567- 89abcdef 16 and a configuration word of 1 16 , the checksum is calculated as shown in figure 6-1. the checksum is 3f 16 . 6.5 test transmitter the hcs512 decoder will aut omatically add a test transmitter each time an erase all function is done. a test transmitter is defined as a transmitter with a serial number of zero. after an erase all, the test transmitter will always work without learning and will not check the synchronization counter of the transmitter. learning of any new transmitters will erase the test transmitter. table 6-3: download data figure 6-1: checksum calculation note 1: a transmitter with a serial number of zero cannot be learned. learn will fail after the first transmission. 2: always learn at least one transmitter after an erase all sequence. this ensures that the test transmitter is erased. byte 9 byte 8 byte 7 byte 6 byte 5 byte 4 byte 3 byte 2 byte 1 byte 0 check- sum config man key_7 man key_6 man key_5 man key_4 man key_3 man key_2 man key_1 man key_0 byte 0, right-most bit downloaded first. 01 16 + 23 16 = 24 6 24 16 + 45 16 = 69 16 69 16 + 67 16 = d0 16 d0 16 + 89 16 = 159 16 59 16 + ab 16 = 104 16 (carry is discarded) 04 16 + cd 16 = d1 16 (carry is discarded) d1 16 + ef 16 = 1c0 16 c0 16 + 1 16 = c1 16 (carry is discarded) (ff 16 - c1 16 ) + 1 16 = 3f 16
? 2011 microchip technology inc. ds40151e-page 11 hcs512 figure 6-2: programming waveforms table 6-4: programming timing requirements parameter symbol min. max. units program mode setup time tps 1 64 ms hold time 1 tph1 8 128 ms hold time 2 tph2 0.05 320 ms clock high time tckh 0.05 320 ms clock low time tckl 0.050 320 ms acknowledge time tack ? 80 ms acknowledge duration tackh 1 ? ms note: f osc equals 4 mhz. bit1 bit0 bit78 bit79 ack mclr clk (clock) dat (data) enter program mode acknowledge pulse t ps t ph1 t ckl t ckh t ack t ph2 80-bit data package t ackh
hcs512 ds40151e-page 12 ? 2011 microchip technology inc. 7.0 key generation schemes the hcs512 decoder has two key generation schemes. normal learning uses the transmitter?s serial number to derive two input seeds which are used as inputs to the key generatio n algorithm. secure learning uses the seed transmission to derive the two input seeds. two key generation algorithms are available to convert the inputs seeds to secret keys. the appropriate scheme is selected in the configuration word. figure 7-1: 7.1 normal learning (serial number derived) the two input seeds are composed from the serial number in two ways, depending on the encoder type. the encoder type is determined from the number of bi ts in the incoming transmission. sourceh is used to calculate the upper 32 bits of the crypt key, and sourcel, for the lower 32 bits. for 28-bit serial number encoders (66 / 67-bit transmissions): sourceh = 6h + 28 bit serial number sourcel = 2h + 28 bit serial number 7.2 secure learning (seed derived) the two input seeds are composed from the seed value that is transmitted during secure learning. the lower 32 bits of the seed transmission is used to compose the lower seed, an d the upper 32 bits, for the upper seed. the upper 4 bits (function code) are set to zero. for 32-bit seed encoders: sourceh = serial number lower 28 bits (with upper 4 bits always zero) sourcel = seed 32 bits for 48-bit seed encoders: sourceh = seed upper 16 bits + serial number upper 16 bits (with upper 4 bits always zero) << 16 sourcel = seed lower 32 bits for 60-bit seed encoders: sourceh = seed upper 28 bits (with upper 4 bits always zero) sourcel = seed lower 32 bits seed patched serial number key generation algorithms ------------------- decrypt xor encoder key manufacturer?s key
? 2011 microchip technology inc. ds40151e-page 13 hcs512 7.3 key generation algorithms there are two key generation algorithms implemented in the hcs512 decoder. the k ee l oq decryption algorithm pro- vides a higher level of security than the xor algorithm. sect ion 6.1 describes the selection of the algorithms in the con- figuration byte. 7.3.1 k ee l oq decrypt algorithm this algorithm uses the k ee l oq decryption algorithm and the manufacturer?s code to derive the crypt key as follows: key upper 32 bits = decrypt (sourceh) 64 bit manufacturers code key lower 32 bits = decrypt (sourcel) 64 bit manufacturers code 7.3.2 xor with the manufacturer?s code the two 32-bits seeds are xor with the manufactu rer?s code to form the 64 bit crypt key. key upper 32 bits = sourceh xor manufacturers code upper 32 bits key lower 32 bits = sourcel xor manufacturers code lower 32 bits after programming the manufacturer?s code, the hcs512 deco der will automatically activate an erase all function, removing all transmitters from the system. if lrnin is taken low momentarily during the learn status indica tion, the indication will be terminated. once a successful learning sequence is detected, the indication can be te rminated, allowing quick learning in a manufacturing setup. figure 7-2: hcs512 key generation k ee l oq ? decryption algorithm padding 6 28-bit serial number padding 2 28-bit serial number ms 32 bits of crypt key ls 32 bits of crypt key normal learn (sc_lrn = 0) lrn0 = 0 k ee l oq decryption algorithm padding 0000b ms 28 bits of seed transmission ls 32 bits of seed transmission ms 32 bits of crypt key ls 32 bits of crypt key secure learn (sc_lrn = 1) xor padding 0000b ms 28 bits of seed transmission ls 32 bits of seed transmission ms 32 bits of crypt key ls 32 bits of crypt key lrn0 = 1 secure learn xor (sc_lrn = 1) lrn0 = 0
hcs512 ds40151e-page 14 ? 2011 microchip technology inc. 8.0 k ee l oq encoders 8.1 transmission format (pwm) the k ee l oq encoder transmission is made up of sev- eral parts (figure 8-1). each transmission begins with a preamble and a header, followed by the encrypted and then the fixed data. the actual data is 66/69 bits which consists of 32 bits of encrypted data and 34/37 bits of non-encrypted data. each transmission is fol- lowed by a guard period before another transmission can begin. the encrypted portion provides up to four billion changing code combinations and includes the button status bits (based on which buttons were acti- vated) along with the synchronization counter value and some discrimination bits. the non-encrypted por- tion is comprised of the status bits, the function bits, and the 28-bit serial number. the encrypted and non- encrypted combined sections increase the number of combinations to 7.38 x 10 19 . 8.2 code word organization the hcsxxx encoder transmits a 66/69-bit code word when a button is pressed. the 66/69-bit word is con- structed from an encryption portion and a non- encrypted code portion (figure 8-2). the encrypted data is generated from four button bits, two overflow counter bits, ten discrimination bits, and the 16-bit synchronization value. the non-encrypted data is made up from 2 status bits, 4 function bits, and the 28/32-bit serial number. figure 8-1: transmiss ion format (pwm) figure 8-2: code word organization logic "1" guard time 50% encrypted portion fixed code portion logic "0" preamble header t e t e t e 10xt e t bp repeat (1-bit) v low (1-bit) button status s2 s1 s0 s3 serial number (28 bits) button status s2 s1 s0 s3 ovr (2 bits) disc (10 bits) sync counter (16 bits) repeat (1-bit) v low (1-bit) button status 1 1 1 1 serial number (28 bits) seed (32 bits) 34 bits of fixed portion 32 bits of encrypted portion 66 data bits transmitted lsb first. lsb msb msb lsb seed replaces encrypted portion when all button inputs are activated at the same time.
? 2011 microchip technology inc. ds40151e-page 15 hcs512 9.0 development support the pic ? microcontrollers and dspic ? digital signal controllers are supported with a full range of software and hardware development tools: ? integrated development environment - mplab ? ide software ? compilers/assemblers/linkers - mplab c compiler for various device families - hi-tech c for various device families - mpasm tm assembler -mplink tm object linker/ mplib tm object librarian - mplab assembler/link er/librarian for various device families ? simulators - mplab sim software simulator ? emulators - mplab real ice? in-circuit emulator ? in-circuit debuggers - mplab icd 3 - pickit? 3 debug express ? device programmers - pickit? 2 programmer - mplab pm3 device programmer ? low-cost demonstratio n/development boards, evaluation kits, and starter kits 9.1 mplab integrated development environment software the mplab ide software brings an ease of software development previously unseen in the 8/16/32-bit microcontroller market. the mplab ide is a windows ? operating system-based app lication that contains: ? a single graphical interface to all debugging tools - simulator - programmer (sold separately) - in-circuit emulator (sold separately) - in-circuit debugger (sold separately) ? a full-featured editor with color-coded context ? a multiple project manager ? customizable data windows with direct edit of contents ? high-level source code debugging ? mouse over variable inspection ? drag and drop variables from source to watch windows ? extensive on-line help ? integration of select thir d party tools, such as iar c compilers the mplab ide allows you to: ? edit your source files (either c or assembly) ? one-touch compile or assemble, and download to emulator and simulator tools (automatically updates all project information) ? debug using: - source files (c or assembly) - mixed c and assembly - machine code mplab ide supports multiple debugging tools in a single development paradigm, from the cost-effective simulators, through low-cost in-circuit debuggers, to full-featured emulators. this eliminates the learning curve when upgrading to tools with increased flexibility and power.
hcs512 ds40151e-page 16 ? 2011 microchip technology inc. 9.2 mplab c compilers for various device families the mplab c compiler code development systems are complete ansi c compilers for microchip?s pic18, pic24 and pic32 families of microcontrollers and the dspic30 and dspic33 families of digital signal control- lers. these compilers provide powerful integration capabilities, superior code optimization and ease of use. for easy source level debugging, the compilers provide symbol information that is optimized to the mplab ide debugger. 9.3 hi-tech c for various device families the hi-tech c compiler code development systems are complete ansi c comp ilers for microchip?s pic family of microcontrollers and the dspic family of digital signal controllers. these compilers provide powerful integration capabilities, omniscient code generation and ease of use. for easy source level debugging, the compilers provide symbol information that is optimized to the mplab ide debugger. the compilers include a macro assembler, linker, pre- processor, and one-step driver, and can run on multiple platforms. 9.4 mpasm assembler the mpasm assembler is a full-featured, universal macro assembler for pic10/12/16/18 mcus. the mpasm assembler generates relocatable object files for the mplink object linker, intel ? standard hex files, map files to detail memory usage and symbol reference, absolute lst files that contain source lines and generated machine code and coff files for debugging. the mpasm assembler features include: ? integration into mplab ide projects ? user-defined macros to streamline assembly code ? conditional assembly for multi-purpose source files ? directives that allow complete control over the assembly process 9.5 mplink object linker/ mplib object librarian the mplink object linker combines relocatable objects created by the mpasm assembler and the mplab c18 c compiler. it can link relocatable objects from precompiled libraries, using directives from a linker script. the mplib object librarian manages the creation and modification of library files of precompiled code. when a routine from a library is called from a source file, only the modules that contain that routine will be linked in with the application. this allows large libraries to be used efficiently in many different applications. the object linker/libra ry features include: ? efficient linking of single libraries instead of many smaller files ? enhanced code maintainability by grouping related modules together ? flexible creation of libraries with easy module listing, replacement, deletion and extraction 9.6 mplab assembler, linker and librarian for various device families mplab assembler produces relocatable machine code from symbolic assembly language for pic24, pic32 and dspic devices. mplab c compiler uses the assembler to produce its object file. the assembler generates relocatable objec t files that can then be archived or linked with other relocatable object files and archives to create an execut able file. notable features of the assembler include: ? support for the entire device instruction set ? support for fixed-point and floating-point data ? command line interface ? rich directive set ? flexible macro language ? mplab ide compatibility
? 2011 microchip technology inc. ds40151e-page 17 hcs512 9.7 mplab sim software simulator the mplab sim software simulator allows code development in a pc-hosted environment by simulat- ing the pic ? mcus and dspic ? dscs on an instruction level. on any given instruction, the data areas can be examined or modified and stimuli can be applied from a comprehensive stimulus c ontroller. registers can be logged to files for further run-time analysis. the trace buffer and logic analyzer display extend the power of the simulator to record and track program execution, actions on i/o, most peripherals and internal registers. the mplab sim software simulator fully supports symbolic debugging using the mplab c compilers, and the mpasm and mplab assemblers. the soft- ware simulator offers the flexibility to develop and debug code outside of the hardware laboratory envi- ronment, making it an excellent, economical software development tool. 9.8 mplab real ice in-circuit emulator system mplab real ice in-circuit emulator system is microchip?s next generation high-speed emulator for microchip flash dsc and mcu devices. it debugs and programs pic ? flash mcus and dspic ? flash dscs with the easy-to-use, powerful graphical user interface of the mplab integrated devel opment environment (ide), included with each kit. the emulator is connected to the design engineer?s pc using a high-speed usb 2.0 interface and is connected to the target with either a connector compatible with in- circuit debugger systems (rj11) or with the new high- speed, noise tolerant, low-voltage differential signal (lvds) interconnection (cat5). the emulator is field upgradable through future firmware downloads in mplab ide. in upcoming releases of mplab ide, new devices will be supported, and new features will be added. mplab real ice offers significant advantages over competitive emulators including low-cost, full-speed emulation, run-time variable watches, trace analysis, complex breakpoints, a ruggedized probe interface and long (up to three meters) interconnection cables. 9.9 mplab icd 3 in-circuit debugger system mplab icd 3 in-circuit debugger system is micro- chip's most cost effective high-speed hardware debugger/programmer for microchip flash digital sig- nal controller (dsc) and microcontroller (mcu) devices. it debugs and programs pic ? flash microcon- trollers and dspic ? dscs with the powerful, yet easy- to-use graphical user interface of mplab integrated development environment (ide). the mplab icd 3 in-circuit debugger probe is con- nected to the design engineer's pc using a high-speed usb 2.0 interface and is connected to the target with a connector compatible with the mplab icd 2 or mplab real ice systems (rj-11). mplab icd 3 supports all mplab icd 2 headers. 9.10 pickit 3 in-circuit debugger/ programmer and pickit 3 debug express the mplab pickit 3 allows debugging and program- ming of pic ? and dspic ? flash microcontrollers at a most affordable price point using the powerful graphical user interface of the mp lab integrated development environment (ide). the mplab pickit 3 is connected to the design engineer's pc using a full speed usb interface and can be connec ted to the target via an microchip debug (rj-11) connector (compatible with mplab icd 3 and mplab real ice). the connector uses two device i/o pins and the reset line to imple- ment in-circuit debugging and in-circuit serial pro- gramming?. the pickit 3 debug express include the pickit 3, demo board and microcontroller, hookup cables and cdrom with user?s guide, lessons, tutorial, compiler and mplab ide software.
hcs512 ds40151e-page 18 ? 2011 microchip technology inc. 9.11 pickit 2 development programmer/debugger and pickit 2 debug express the pickit? 2 development programmer/debugger is a low-cost development tool with an easy to use inter- face for programming and debugging microchip?s flash families of microcontrollers. the full featured windows ? programming interface supports baseline (pic10f, pic12f5xx, pic16f5xx), midrange (pic12f6xx, pic16f), pic18f, pic24, dspic30, dspic33, and pic32 families of 8-bit, 16-bit, and 32-bit microcontrollers, and many microchip serial eeprom products. with microchip?s powerful mplab integrated development environmen t (ide) the pickit? 2 enables in-circuit debugging on most pic ? microcon- trollers. in-circuit-debugging runs, halts and single steps the program while the pic microcontroller is embedded in the applicatio n. when halted at a break- point, the file registers ca n be examined and modified. the pickit 2 debug express include the pickit 2, demo board and microcontroller, hookup cables and cdrom with user?s guide, lessons, tutorial, compiler and mplab ide software. 9.12 mplab pm3 device programmer the mplab pm3 device programmer is a universal, ce compliant device programmer with programmable voltage verification at v ddmin and v ddmax for maximum reliability. it features a large lcd display (128 x 64) for menus and error messages and a modu- lar, detachable socket asse mbly to support various package types. the icsp? ca ble assembly is included as a standard item. in stand-alone mode, the mplab pm3 device programmer can read, verify and program pic devices without a pc co nnection. it can also set code protection in this mode. the mplab pm3 connects to the host pc via an rs-232 or usb cable. the mplab pm3 has high-speed communications and optimized algorithms for quick programming of large memory devices and incorpor ates an mmc card for file storage and data applications. 9.13 demonstration/development boards, evaluation kits, and starter kits a wide variety of demonstr ation, development and evaluation boards for various pic mcus and dspic dscs allows quick application development on fully func- tional systems. most boards include prototyping areas for adding custom circuitry and provide application firmware and source code for examination and modification. the boards support a variety of features, including leds, temperature sensors, sw itches, speakers, rs-232 interfaces, lcd displays, potentiometers and additional eeprom memory. the demonstration and development boards can be used in teaching environments, for prototyping custom circuits and for learning about various microcontroller applications. in addition to the picdem? and dspicdem? demon- stration/development board series of circuits, microchip has a line of evaluation kits and demonstration software for analog filter design, k ee l oq ? security ics, can, irda ? , powersmart battery management, seeval ? evaluation system, sigma-delta adc, flow rate sensing, plus many more. also available are starter kits that contain everything needed to experience the specified device. this usually includes a single application and debug capability, all on one board. check the microchip web page (www.microchip.com) for the complete list of demonstration, development and evaluation kits.
? 2011 microchip technology inc. ds40151e-page 19 hcs512 10.0 electrical characteristics absolute maximum ratings ? ambient temperature under bias................................................................................................. ............-55c to +125c storage temperature ............................................................................................................ ...................-65c to +150c voltage on any pin with respect to v ss (except v dd ) ............................................................................ -0.6v to v dd +0.6v voltage on v dd with respect to vss........................................................................................................... .........0 to +7.5v total power dissipation (note 1) ..........................................................................................................................800 m w maximum current out of v ss pin........................................................................................................................... ..150 ma maximum current into v dd pin........................................................................................................................... .....100 ma input clamp current, iik ( v i < 0 or v i > v dd ) ............................................................................................................ 20 ma output clamp current, iok (v o < 0 or v o > v dd ) .................................................................................................... 20 ma maximum output current sunk by any i/o pin............. ........................................................................ .....................25 ma maximum output current sourced by any i/o pin .......... ........................................................................ ..................20 ma note: power dissipation is calculated as follows: pdis = v dd x {i dd - i oh } + {(v dd ?v oh ) x i oh } + (v o l x i ol ) ? notice: stresses above those listed under ?absolute maximum ratings? may cause permanent damage to the device. this is a stress rating only and functional oper ation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. ex posure to maximum ra ting conditions for extended periods may affect device reliability.
hcs512 ds40151e-page 20 ? 2011 microchip technology inc. table 10-1: dc characteristics table 10-2: ac characteristics standard operating conditions (unless otherwise stated) operating temperature commercial (c): 0 c t a +70 c for commercial industrial (i): -40 c t a +85 c for industrial symbol characteristic min typ ( ? ) max units conditions v dd supply voltage 4.0 ? 6.0 v v por v dd start voltage to ensure reset ?v ss ?v s vdd v dd rise rate to ensure reset 0.05* ? ? v/ms i dd supply current ? ? 1.8 7.3 15 4.5 10 32 ma ma a f osc = 4 mhz, v dd = 5.5v (during eeprom programming) in sleep mode v il input low voltage v ss ?0.16 v dd v except mclr = 0.2 v dd v ih input high voltage 0.48 v dd ?v dd v except mclr = 0.85 v dd v ol output low voltage ? ? 0.6 v i ol = 8.5 ma, v dd = 4.5v v oh output high voltage v dd -0.7 ? ? v i oh = -3.0 ma, v dd = 4.5v ? data in ?typ? column is at 5.0v, 25 c unless otherwise stated. these parameters are for design guidance only and are not tested. * these parameters are characterized but not tested. note: negative current is defined as coming out of the pin. symbol characteristic min typ max units conditions f osc oscillator frequency 2.7 4 6.21 mhz r ext = 10k, c ext = 10 pf t e pwm elemental pulse width 65 ? 1080 s4.5v < v dd < 5.5v oscillator components tolerance < 6%. 130 ? 1080 s3v < v dd < 6v oscillator components tolerance <10% t od output delay 70 90 115 ms t a output activation time 322 500 740 ms t rpt repeat activation time 32 50 74 ms t lrn lrnin activation time 21 32 ? ms t mclr mclr low time 150 ? ? ns t ov time output valid ? 150 222 ms * these parameters are characterized but not tested.
? 2011 microchip technology inc. ds40151e-page 21 hcs512 figure 10-1: reset watchdog timer, os cillator start-up timer and power-up timer timing v dd mclr i/o pins t ov tmclr
hcs512 ds40151e-page 22 ? 2011 microchip technology inc. figure 10-2: output activation rfin s[3,2,1,0] lrnout 0s 1s 2s 3s 4s 5s 1 code word 50 ms tod t a t a v low note 1: output is activated as long as code is received. 2: output is activate d if battery low ( v low ) is detected. note 2 note 1
? 2011 microchip technology inc. ds40151e-page 23 hcs512 figure 10-3: typical deco der application circuit s1 s2 s3 lrnout s0 v d d g n d g n d v dd low voltage detector?do not omit vi vo 10k v dd 4.7k 22 pf 14 p2 5 v dd 10k 1 receive data input 1 2 3 12v gnd 1n4004/7 100 f power supply g n d lm7805 vi vo v dd nc rfin lrnin lrnout s0 s1 s2 s3 v low sleep clk dat mclr nc osc in osc out 4 3 16 15 learn button v low p3 1k 1k 1k 1k 1k 1k 100 f p4 p3 p2 in-circuit 17 18 1 2 6 7 8 9 10 11 12 13 hcs512 p4 100k programming pads data clock reset gnd p1 mcp100-450
hcs512 ds40151e-page 24 ? 2011 microchip technology inc. 11.0 packaging information 11.1 package marking information 18-lead pdip example 18-lead soic example xxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxx yywwnnn hcs512 0110017 yywwnnn xxxxxxxxxxxx xxxxxxxxxxxx xxxxxxxxxxxx 0110017 /so hcs512 legend: xx...x customer specific information* y year code (last digit of calendar year) yy year code (last 2 digits of calendar year) ww week code (week of january 1 is week ?01?) nnn alphanumeric traceability code note : in the event the full microchip part num ber cannot be marked on one line, it will be carried over to the next line thus limiting the number of available characters for customer specific information. * standard pic mcu device marking consists of micr ochip part number, year code, week code, and traceability code. for pic mcu device marking beyond this, certain price adders apply. please check with your microchip sales office. for qtp devices, any special marking adders are included in qtp price.
? 2011 microchip technology inc. ds40151e-page 25 hcs512 11.2 package details

!"#$%&" ' ()"&'"!&)
&#*&&&# +%&, & !& - '!
!#.#

&"#'
#%!

& "!
!
#%!

& "!
!!
&$#/ !# '!
#&
.0 1,2 1!'!

&$& "!
**&
"&&
! 3
&'
!&" &4# *!(!!&
4%&

&#& &&255***'

'54 6&! 7,8. '!
9'&! 7 7: ; 7"')
%! 7 < & 1,
&
& = =
##4 4!! - 1!&
& = =
"# &

"# >#& . - - -
##4>#& . < : 9& << &
& 9 - 9# 4!! < 6 9#>#& ) ? 9
* 9#>#& ) < :
*+ 1 = = - note 1 n e1 d 1 23 a a1 a2 l e eb c e b1 b

* ,1
hcs512 ds40151e-page 26 ? 2011 microchip technology inc. note: for the most current package drawings, please see the microchip packaging specification located at http://www.microchip.com/packaging
? 2011 microchip technology inc. ds40151e-page 27 hcs512 note: for the most current package drawings, please see the microchip packaging specification located at http://www.microchip.com/packaging
hcs512 ds40151e-page 28 ? 2011 microchip technology inc. note: for the most current package drawings, please see the microchip packaging specification located at http://www.microchip.com/packaging
? 2011 microchip technology inc. ds40151e-page 29 hcs512 appendix a: additional information microchip?s secure data products are covered by some or all of the following: code hopping encoder patents issued in european countries and u.s.a. secure learning patents issued in european countries, u.s.a. and r.s.a. revision history revision e (june 2011) ? updated the following sections: development sup- port, the microchip web site, reader response and hcs512 product identification system ? added new section appendix a ? minor formatting and text changes were incorporated throughout the document
hcs512 ds40151e-page 30 ? 2011 microchip technology inc. the microchip web site microchip provides online support via our www site at www.microchip.com. this web site is used as a means to make files and information easily available to customers. accessible by using your favorite internet browser, the web site contains the following information: ? product support ? data sheets and errata, application notes and sample programs, design resources, user?s guides and hardware support documents, latest software releases and archived software ? general technical support ? frequently asked questions (faq), technical support requests, online discussion groups, microchip consultant program member listing ? business of microchip ? product selector and ordering guides, latest microchip press releases, listing of seminars and events, listings of microchip sales offices, distributors and factory representatives customer change notification service microchip?s customer notification service helps keep customers current on microchip products. subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or de velopment tool of interest. to register, access the microchip web site at www.microchip.com. under ?support?, click on ?customer change notification? and follow the registration instructions. customer support users of microchip products can receive assistance through several channels: ? distributor or representative ? local sales office ? field application engineer (fae) ? technical support ? development systems information line customers should contact their distributor, representative or field application engineer (fae) for support. local sales offices are also available to help customers. a listing of sa les offices and locations is included in the back of this document. technical support is available through the web site at: http://micro chip.com/support
? 2011 microchip technology inc. ds40151e-page 31 hcs512 reader response it is our intention to provide you with the best documentation possible to ensure successful use of your microchip product. if you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please fax your comments to the technical publications manager at (480) 792-4150. please list the following information, and use this outli ne to provide us with your comments about this document. to: technical publications manager re: reader response total pages sent ________ from: name company address city / state / zip / country telephone: (_______) _________ - _________ application (optional): would you like a reply? y n device: literature number: questions: fax: (______) _________ - _________ ds40151e hcs512 1. what are the best features of this document? 2. how does this document meet your hardware and software development needs? 3. do you find the organization of this document easy to follow? if not, why? 4. what additions to the document do you th ink would enhance the structure and subject? 5. what deletions from the document could be made without affecting the overall usefulness? 6. is there any incorrect or misl eading information (what and where)? 7. how would you improve this document?
hcs512 ds40151e-page 32 ? 2011 microchip technology inc. hcs512 product iden tification system to order or obtain information, e.g., on pricing or deli very, refer to the factory or the listed sales office. package: p = plastic dip (300 mil body), 18-lead so = plastic soic (300 mil body), 18-lead temperature range: blank = 0c to +70c i =-40c to +85c device: hcs512 code hopping decoder hcs512t code hopping decoder (tape and reel) hcs512 ? /p
? 2011 microchip technology inc. ds40151e-page 33 information contained in this publication regarding device applications and the like is prov ided only for your convenience and may be superseded by updates. it is your responsibility to ensure that your application me ets with your specifications. microchip makes no representations or warranties of any kind whether express or implied, written or oral, statutory or otherwise, related to the information, including but not limited to its condition, quality, performance, merchantability or fitness for purpose . microchip disclaims all liability arising from this information and its use. use of microchip devices in life support and/or safe ty applications is entirely at the buyer?s risk, and the buyer agrees to defend, indemnify and hold harmless microchip from any and all damages, claims, suits, or expenses resulting fr om such use. no licenses are conveyed, implicitly or ot herwise, under any microchip intellectual property rights. trademarks the microchip name and logo, th e microchip logo, dspic, k ee l oq , k ee l oq logo, mplab, pic, picmicro, picstart, pic 32 logo, rfpic and uni/o are registered trademarks of microchip technology incorporated in the u.s.a. and other countries. filterlab, hampshire, hi-tech c, linear active thermistor, mxdev, mxlab, seeval and the embedded control solutions company are register ed trademarks of microchip technology incorporated in the u.s.a. analog-for-the-digital age, a pplication maestro, codeguard, dspicdem, dspicdem.net, dspicworks, dsspeak, ecan, economonitor, fansense, hi-tide, in-circuit serial programming, icsp, mindi, miwi, mpasm, mplab certified logo, mplib, mplink, mtouch, omniscient code generation, picc, picc-18, picdem, picdem.net, pickit, pictail, real ice, rflab, select mode, total endurance, tsharc, uniwindriver, wiperlock and zena are trademarks of microchip te chnology incorporated in the u.s.a. and other countries. sqtp is a service mark of mi crochip technology incorporated in the u.s.a. all other trademarks mentioned herein are property of their respective companies. ? 2011, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. isbn: 978-1-61341-223-7 note the following details of the code protection feature on microchip devices: ? microchip products meet the specification cont ained in their particular microchip data sheet. ? microchip believes that its family of products is one of the mo st secure families of its kind on the market today, when used i n the intended manner and under normal conditions. ? there are dishonest and possibly illegal meth ods used to breach the code protection fe ature. all of these methods, to our knowledge, require using the microchip pr oducts in a manner outside the operating specif ications contained in microchip?s data sheets. most likely, the person doing so is engaged in theft of intellectual property. ? microchip is willing to work with the customer who is concerned about the integrity of their code. ? neither microchip nor any other semiconduc tor manufacturer can guarantee the security of their code. code protection does not mean that we are guaranteeing the product as ?unbreakable.? code protection is constantly evolving. we at microchip are committed to continuously improving the code protection features of our products. attempts to break microchip?s c ode protection feature may be a violation of the digital millennium copyright act. if such acts allow unauthorized access to your softwa re or other copyrighted work, you may have a right to sue for relief under that act. microchip received iso/ts-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona; gresham, oregon and design centers in california and india. the company?s quality system processes and procedures are for its pic ? mcus and dspic ? dscs, k ee l oq ? code hopping devices, serial eeproms, microperi pherals, nonvolatile memory and analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001:2000 certified.
ds40151e-page 34 ? 2011 microchip technology inc. americas corporate office 2355 west chandler blvd. chandler, az 85224-6199 tel: 480-792-7200 fax: 480-792-7277 technical support: http://www.microchip.com/ support web address: www.microchip.com atlanta duluth, ga tel: 678-957-9614 fax: 678-957-1455 boston westborough, ma tel: 774-760-0087 fax: 774-760-0088 chicago itasca, il tel: 630-285-0071 fax: 630-285-0075 cleveland independence, oh tel: 216-447-0464 fax: 216-447-0643 dallas addison, tx tel: 972-818-7423 fax: 972-818-2924 detroit farmington hills, mi tel: 248-538-2250 fax: 248-538-2260 indianapolis noblesville, in tel: 317-773-8323 fax: 317-773-5453 los angeles mission viejo, ca tel: 949-462-9523 fax: 949-462-9608 santa clara santa clara, ca tel: 408-961-6444 fax: 408-961-6445 toronto mississauga, ontario, canada tel: 905-673-0699 fax: 905-673-6509 asia/pacific asia pacific office suites 3707-14, 37th floor tower 6, the gateway harbour city, kowloon hong kong tel: 852-2401-1200 fax: 852-2401-3431 australia - sydney tel: 61-2-9868-6733 fax: 61-2-9868-6755 china - beijing tel: 86-10-8569-7000 fax: 86-10-8528-2104 china - chengdu tel: 86-28-8665-5511 fax: 86-28-8665-7889 china - chongqing tel: 86-23-8980-9588 fax: 86-23-8980-9500 china - hangzhou tel: 86-571-2819-3180 fax: 86-571-2819-3189 china - hong kong sar tel: 852-2401-1200 fax: 852-2401-3431 china - nanjing tel: 86-25-8473-2460 fax: 86-25-8473-2470 china - qingdao tel: 86-532-8502-7355 fax: 86-532-8502-7205 china - shanghai tel: 86-21-5407-5533 fax: 86-21-5407-5066 china - shenyang tel: 86-24-2334-2829 fax: 86-24-2334-2393 china - shenzhen tel: 86-755-8203-2660 fax: 86-755-8203-1760 china - wuhan tel: 86-27-5980-5300 fax: 86-27-5980-5118 china - xian tel: 86-29-8833-7252 fax: 86-29-8833-7256 china - xiamen tel: 86-592-2388138 fax: 86-592-2388130 china - zhuhai tel: 86-756-3210040 fax: 86-756-3210049 asia/pacific india - bangalore tel: 91-80-3090-4444 fax: 91-80-3090-4123 india - new delhi tel: 91-11-4160-8631 fax: 91-11-4160-8632 india - pune tel: 91-20-2566-1512 fax: 91-20-2566-1513 japan - yokohama tel: 81-45-471- 6166 fax: 81-45-471-6122 korea - daegu tel: 82-53-744-4301 fax: 82-53-744-4302 korea - seoul tel: 82-2-554-7200 fax: 82-2-558-5932 or 82-2-558-5934 malaysia - kuala lumpur tel: 60-3-6201-9857 fax: 60-3-6201-9859 malaysia - penang tel: 60-4-227-8870 fax: 60-4-227-4068 philippines - manila tel: 63-2-634-9065 fax: 63-2-634-9069 singapore tel: 65-6334-8870 fax: 65-6334-8850 taiwan - hsin chu tel: 886-3-6578-300 fax: 886-3-6578-370 taiwan - kaohsiung tel: 886-7-213-7830 fax: 886-7-330-9305 taiwan - taipei tel: 886-2-2500-6610 fax: 886-2-2508-0102 thailand - bangkok tel: 66-2-694-1351 fax: 66-2-694-1350 europe austria - wels tel: 43-7242-2244-39 fax: 43-7242-2244-393 denmark - copenhagen tel: 45-4450-2828 fax: 45-4485-2829 france - paris tel: 33-1-69-53-63-20 fax: 33-1-69-30-90-79 germany - munich tel: 49-89-627-144-0 fax: 49-89-627-144-44 italy - milan tel: 39-0331-742611 fax: 39-0331-466781 netherlands - drunen tel: 31-416-690399 fax: 31-416-690340 spain - madrid tel: 34-91-708-08-90 fax: 34-91-708-08-91 uk - wokingham tel: 44-118-921-5869 fax: 44-118-921-5820 worldwide sales and service 05/02/11

▲Up To Search▲

Price & Availability of HCS512T-ISOC23

	To Download HCS512T-ISOC23 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .