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| ht48ra0-2/HT48CA0-2 remote type 8-bit mcu block diagram rev. 1.50 1 july 23, 2004 features operating voltage: 2.0v~3.6v ten bidirectional i/o lines 4 schmitt trigger input lines one carrier output (1 / 2or1 / 3 duty) on-chip crystal and rc oscillator watchdog timer 1k 14 program memory 32 8 data ram halt function and wake-up feature reduce power consumption 62 powerful instructions up to 1 s instruction cycle with 4mhz system clock all instructions in 1 or 2 machine cycles 14-bit table read instructions one-level subroutine nesting bit manipulation instructions low voltage reset function 20-pin sop/ssop package general description the ht48ra0-2/HT48CA0-2 are 8-bit high perfor - mance, risc architecture microcontroller devices spe - cifically designed for multiple i/o control product applications. the mask version HT48CA0-2 is fully pin and functionally compatible with the otp version ht48ra0-2 device. the advantages of low power consumption, i/o flexibil - ity, timer functions, oscillator options, watchdog timer, halt and wake-up functions, as well as low cost, en - hance the versatility of this device to suit a wide range of application possibilities such as industrial control, con - sumer products, and particularly suitable for use in products such as infrared remote controllers and vari - ous subsystem controllers. ! " # $ % & ' # ( ) * + , - # . / / % / 0 ( # 1 . 1 # # $ ) # $ # 1 # / / $ % / pin assignment pin description pin name i/o code option description pa0~pa7 i/o bidirectional 8-bit input/output port with pull-high resistors. each bit can be de - termined as nmos output or schmitt trigger input by software instructions. pb0, pb1 i/o wake-up or none 2-bit bidirectional input/output lines with pull-high resistors. each bit can be de - termined as nmos output or schmitt trigger input by software instructions. each bit can also be configured as wake-up input by code option. pb2~pb5 i wake-up or none 4-bit schmitt trigger input lines with pull-high resistors. each bit can be config- ured as a wake-up input by code option. pc0/rem o level or carrier level or carrier output pin pc0 can be set as cmos output pin or carrier output pin by code option. vdd positive power supply vss negative power supply, ground osc2 osc1 o i crystal or rc osc1, osc2 are connected to an rc network or a crystal (determined by code option) for the internal system clock. in the case of rc operation, osc2 is the output terminal for 1/4 system clock (nmos open drain output). res i schmitt trigger reset input. active low. absolute maximum ratings supply voltage ...........................v ss 0.3v to v ss +4.0v storage temperature ............................ 50 cto125 c input voltage..............................v ss 0.3v to v dd +0.3v operating temperature........................... 40 cto85 c note: these are stress ratings only. stresses exceeding the range specified under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil - ity. ht48ra0-2/HT48CA0-2 rev. 1.50 2 july 23, 2004 2 * 0 3 & / / 2 / * / 0 $ / / $ $ ) $ 4 5 & 3 0 * 2 2 * 0 3 & 5 4 $ d.c. characteristics ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions v dd operating voltage 2.0 3.6 v i dd operating current 3v no load, f sys =4mhz 0.7 1.5 ma i stb standby current 3v no load, system halt 1 a v il1 input low voltage for i/o ports 3v 0 0.3v dd v v ih1 input high voltage for i/o ports 3v 0.7v dd v dd v v il2 input low voltage (res )3v 0 0.4v dd v v ih2 input high voltage (res )3v 0.9v dd v dd v v lvr low voltage reset voltage 1.9 2.0 v i ol i/o ports sink current 3v v ol =0.1v dd 48 ma i oh pc0/rem output source current 3v v oh =0.9v dd 2 4 ma r ph pull-high resistance 3v 20 60 100 k a.c. characteristics ta=25 c symbol parameter test conditions min. typ. max. unit v dd conditions f sys system clock 3v 400 4000 khz t res external reset low pulse width 1 s t sst system start-up timer period power-up, reset or wake-up from halt 1024 t sys t lvr low voltage width to reset 1 ms note: t sys =1/f sys ht48ra0-2/HT48CA0-2 rev. 1.50 3 july 23, 2004 functional description execution flow the ht48ra0-2/HT48CA0-2 system clock can be de - rived from a crystal/ceramic resonator oscillator. it is in - ternally divided into four non-overlapping clocks. one instruction cycle consists of four system clock cycles. instruction fetching and execution are pipelined in such a way that a fetch takes one instruction cycle while de - coding and execution takes the next instruction cycle. however, the pipelining scheme causes each instruc - tion to effectively execute within one cycle. if an instruc - tion changes the program counter, two cycles are required to complete the instruction. 2 * 2 * 2 * , ! # 6 # 7 8 9 # 6 # 7 : 8 , ! # 6 # 7 ; 8 9 # 6 # 7 8 , ! # 6 # 7 ; 8 9 # 6 # 7 ; 8 ; ; # 1 < # 1 execution flow ht48ra0-2/HT48CA0-2 rev. 1.50 4 july 23, 2004 program counter pc the 10-bit program counter (pc) controls the sequence in which the instructions stored in program rom are ex - ecuted and its contents specify a maximum of 1024 ad - dresses. after accessing a program memory word to fetch an in - struction code, the contents of the program counter are incremented by one. the program counter then points to the memory word containing the next instruction code. when executing a jump instruction, conditional skip ex - ecution, loading pcl register, subroutine call, initial re - set or return from subroutine, the pc manipulates the program transfer by loading the address corresponding to each instruction. the conditional skip is activated by instruction. once the condition is met, the next instruction, fetched during the current instruction execution, is discarded and a dummy cycle replaces it to get the proper instruction. otherwise proceed with the next instruction. the lower byte of the program counter (pcl) is a read - able and writeable register (06h). moving data into the pcl performs a short jump. the destination will be within 256 locations. when a control transfer takes place, an additional dummy cycle is required. program memory rom the program memory is used to store the program in- structions which are to be executed. it also contains data and table and is organized into 1024 14 bits, ad - dressed by the program counter and table pointer. certain locations in the program memory are reserved for special usage: location 000h this area is reserved for the initialization program. af - ter chip reset, the program always begins execution at location 000h. table location any location in the eprom space can be used as look-up tables. the instructions tabrdc [m] (the cur - rent page, one page=256 words) and tabrdl [m] (the last page) transfer the contents of the lower-order byte to the specified data memory, and the mode program counter *9 *8 *7 *6 *5 *4 *3 *2 *1 *0 initial reset 0000000000 skip pc+2 loading pcl *9 *8 @7 @6 @5 @4 @3 @2 @1 @0 jump, call branch #9 #8 #7 #6 #5 #4 #3 #2 #1 #0 return from subroutine s9 s8 s7 s6 s5 s4 s3 s2 s1 s0 program counter note: *9~*0: program counter bits s9~s0: stack register bits #9~#0: instruction code bits @7~@0: pcl bits $ $ $ = . # 1 > # ? * # @ < : ? # @ 1 # 7 0 3 # a 8 $ $ = < : ? # @ 1 # 7 0 3 # a 8 2 , , = 6 b # # # " # $ # # 2 , , = program memory instruction(s) table location *9 *8 *7 *6 *5 *4 *3 *2 *1 *0 tabrdc [m] p9 p8 @7 @6 @5 @4 @3 @2 @1 @0 tabrdl [m] 1 1 @7 @6 @5 @4 @3 @2 @1 @0 table location note: *9~*0: table location bits @7~@0: table pointer bits p9~p8: current program counter bits ht48ra0-2/HT48CA0-2 rev. 1.50 5 july 23, 2004 higher-order byte to tblh (08h). only the destination of the lower-order byte in the table is well-defined, the other bits of the table word are transferred to the lower portion of tblh, the remaining 2 bits are read as 0 . the table higher-order byte register (tblh) is read only. the table pointer (tblp) is a read/write register (07h), where p indicates the table location. before ac - cessing the table, the location must be placed in tblp. the tblh is read only and cannot be restored. all table related instructions need 2 cycles to complete the operation. these areas may function as normal program memory depending upon the requirements. stack register stack this is a special part of the memory used to save the contents of the program counter (pc) only. the stack is organized into one level and is neither part of the data nor part of the program space, and is neither readable nor writeable. the activated level is indexed by the stack pointer (sp) and is neither readable nor writeable. at a subroutine call the contents of the program counter are pushed onto the stack. at the end of a subroutine sig - naled by a return instruction (ret), the program counter is restored to its previous value from the stack. after a chip reset, the sp will point to the top of the stack. if the stack is full and a call is subsequently exe - cuted, stack overflow occurs and the first entry will be lost (only the most recent return address is stored). data memory ram the data memory is designed with 42 8 bits. the data memory is divided into two functional groups: special function registers and general purpose data memory (32 8). most of them are read/write, but some are read only. the special function registers include the indirect ad - dressing register (00h), the memory pointer register (mp;01h), the accumulator (acc;05h) the program counter lower-order byte register (pcl;06h), the table pointer (tblp;07h), the table higher-order byte register (tblh;08h), the status register (status;0ah) and the i/o registers (pa;12h, pb;14h, pc;16h). the remaining space before the 20h is reserved for future expanded usage and reading these locations will return the result 00h. the general purpose data memory, addressed from 20h to 3fh, is used for data and control informa - tion under instruction command. all data memory areas can handle arithmetic, logic, in - crement, decrement and rotate operations directly. ex - cept for some dedicated bits, each bit in the data memory can be set and reset by the set [m].i and clr [m].i instructions, respectively. they are also indirectly accessible through memory pointer register (mp;01h). indirect addressing register location 00h is an indirect addressing register that is not physically implemented. any read/write operation of [00h] accesses data memory pointed to by mp (01h). reading location 00h itself indirectly will return the re - sult 00h. writing indirectly results in no operation. the memory pointer register mp (01h) is a 6-bit register. the bit 7~6 of mp is undefined and reading will return the result 1 . any writing operation to mp will only trans - fer the lower 6-bit data to mp. accumulator the accumulator closely relates to alu operations. it is also mapped to location 05h of the data memory and is capable of carrying out immediate data operations. data movement between two data memory locations has to pass through the accumulator. 1 # ? # ' 7 2 # / 8 ? 1 # ? # ' $ $ = $ = $ = $ 2 = $ * = $ 0 = $ 3 = $ & = $ 5 = $ 4 = $ = $ / = $ = $ = $ = $ , = $ = = = 2 = * = 0 = 3 = & = 5 = 4 = = / = = = = , = 2 , = # # / / = / b # # # c $ $ c $ = ram mapping ht48ra0-2/HT48CA0-2 rev. 1.50 6 july 23, 2004 arithmetic and logic unit alu this circuit performs 8-bit arithmetic and logic operation. the alu provides the following functions. arithmetic operations (add, adc, sub, sbc, daa) logic operations (and, or, xor, cpl) rotation (rl, rr, rlc, rrc) increment and decrement (inc, dec) branch decision (sz, snz, siz, sdz ....) the alu not only saves the results of a data operation but also changes the contents of the status register. status register status this 8-bit status register (0ah) contains the zero flag (z), carry flag (c), auxiliary carry flag (ac), overflow flag (ov), power down flag (pdf) and watchdog time-out flag (to). it also records the status information and con - trols the operation sequence. with the exception of the to and pdf flags, bits in the status register can be altered by instructions like most other register. any data written into the status register will not change the to or pdf flags. in addition it should be noted that operations related to the status register may give different results from those intended. the to and pdf flags can only be changed by the watchdog timer overflow, chip power-up, clearing the watchdog timer and executing the halt instruction. the z, ov, ac and c flags generally reflect the status of the latest operations. in addition, on executing the subroutine call, the status register will not be automatically pushed onto the stack. if the contents of the status are important and if the sub- routine can corrupt the status register, precautions must be taken to save it properly. oscillator configuration there are two oscillator circuits implemented in the microcontroller. both are designed for system clocks; the rc oscillator and the crystal oscillator, which are determined by code options. no matter what oscillator type is selected, the signal provides the system clock. the halt mode stops the system oscillator and ignores the external signal to conserve power. if an rc oscillator is used, an external resistor between osc1 and vss in needed and the resistance must range from 51k to 1m . the system clock, divided by 4, is available on osc2, which can be used to synchro - nize external logic. the rc oscillator provides the most cost effective solution. however, the frequency of the oscillation may vary with v dd , temperature and the chip itself due to process variations. it is, therefore, not suit- able for timing sensitive operations where accurate os- cillator frequency is desired. if the crystal oscillator is used, a crystal across osc1 and osc2 is needed to provide the feedback and phase shift for the oscillator. no other external components are needed. instead of a crystal, the resonator can also be connected between osc1 and osc2 to get a frequency reference, but two external capacitors in osc1 and osc2 are required. labels bits function c0 c is set if the operation results in a carry during an addition operation or if a borrow does not take place during a subtraction operation; otherwise c is cleared. c is also affected by a rotate through carry instruction. ac 1 ac is set if the operation results in a carry out of the low nibbles in addition or no borrow from the high nibble into the low nibble in subtraction; otherwise ac is cleared. z 2 z is set if the result of an arithmetic or logic operation is zero; otherwise z is cleared. ov 3 ov is set if the operation results in a carry into the highest-order bit but not a carry out of the highest-order bit, or vice versa; otherwise ov is cleared. pdf 4 pdf is cleared when either a system power-up or executing the clr wdt instruction. pdf is set by executing the halt instruction. to 5 to is cleared by a system power-up or executing the clr wdt or halt instruction. to is set by a wdt time-out. 6~7 unused bit, read as 0 status register 1 # 1 1 # 1 1 " ' ) * 7 6 # ? # ? 8 system oscillator ht48ra0-2/HT48CA0-2 rev. 1.50 7 july 23, 2004 watchdog timer wdt the clock source of the wdt is implemented by instruc - tion clock (system clock divided by 4). the clock source is processed by a frequency divider and a prescaller to yield various time out periods. wdt time out period = clock source 2 n where n= 8~11 selected by code option. this timer is designed to prevent a software malfunction or sequence jumping to an unknown location with un - predictable results. the watchdog timer can be dis - abled by code option. if the watchdog timer is disabled, all the executions related to the wdt result in no opera - tion and the wdt will lose its protection purpose. in this situation the logic can only be restarted by an external logic. a wdt overflow under normal operation will initialize chip reset and set the status bit to . to clear the contents of the wdt prescaler, three methods are adopted; external reset (a low level to res ), software instructions, or a halt instruction. there are two types of software instructions. one type is the single instruction clr wdt , the other type comprises two instructions, clr wdt1 and clr wdt2 . of these two types of instructions, only one can be active depending on the code option clr wdt times selection option .ifthe clr wdt is selected (i.e.. clr wdt times equal one), any execution of the clr wdt instruction will clear the wdt. in case clr wdt1 and clr wdt2 are chosen (i.e.. clr wdt times equal two), these two instructions must be executed to clear the wdt; otherwise, the wdt may reset the chip due to a time-out. power down operation halt the halt mode is initialized by the halt instruction and results in the following... the system oscillator turns off and the wdt stops. the contents of the on-chip ram and registers remain unchanged. wdt prescaler are cleared. all i/o ports maintain their original status. the pdf flag is set and the to flag is cleared. the system can quit the halt mode by means of an ex - ternal reset or an external falling edge signal on port b. an external reset causes a device initialization. exam - ining the to and pdf flags, the reason for chip reset can be determined. the pdf flag is cleared when the system powers up or execute the clr wdt instruction and is set when the halt instruction is executed. the to flag is set if the wdt time-out occurs, and causes a wake-up that only resets the pc (program counter) and sp, the others keep their original status. the port b wake-up can be considered as a continuation of normal execution. each bit in port b can be independ - ently selected to wake up the device by the code option. awakening from an i/o port stimulus, the program will resume execution of the next instruction. once a wake-up event(s) occurs, it takes 1024 t sys (system clock period) to resume normal operation. in other words, a dummy cycle period will be inserted after the wake-up. to minimize power consumption, all i/o pins should be carefully managed before entering the halt status. 1 < # 7 # 1 < ) * 8 2 : @ # 1 1 7 5 : @ 8 + : # ? 1 ? 1 # + , - # . 1 < # 7 d 5 % 8 watchdog timer ht48ra0-2/HT48CA0-2 rev. 1.50 8 july 23, 2004 reset there are three ways in which a reset can occur: res reset during normal operation res reset during halt wdt time-out reset during normal operation some registers remain unchanged during reset condi - tions. most registers are reset to the initial condition when the reset conditions are met. by examining the pdf and to flags, the program can distinguish between different chip resets . to pdf reset conditions 0 0 res reset during power-up u u res reset during normal operation 0 1 res wake-up halt 1 u wdt time-out during normal operation note: u means unchanged. to guarantee that the system oscillator has started and stabilized, the sst (system start-up timer) provides an extra-delay of 1024 system clock pulses when the sys - tem powers up or when the system awakes from a halt state. when a system power up occurs, an sst delay is added during the reset period. but when the reset comes from the res pin, the sst delay is disabled. any wake-up from halt will enable the sst delay. the functional unit chip reset status is shown below. pc 000h wdt prescaler clear input/output ports input mode sp points to the top of the stack carrier output low level + + : = a : # $ : ? ? 1 # reset configuration reset circuit # : ! ? # # reset timing chart the chip reset status of the registers is summarized in the following table: register reset (power on) wdt time-out (normal operation) res reset (normal operation) res reset (halt) wdt time-out (halt)* program counter 000h 000h 000h 000h 000h mp -xxx xxxx -uuu uuuu -uuu uuuu -uuu uuuu -uuu uuuu acc xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu tblp xxxx xxxx uuuu uuuu uuuu uuuu uuuu uuuu uuuu uuuu tblh --xx xxxx --uu uuuu --uu uuuu --uu uuuu --uu uuuu status --00 xxxx --1u uuuu --uu uuuu --01 uuuu --11 uuuu pa 1111 1111 1111 1111 1111 1111 1111 1111 uuuu uuuu pb 0011 1111 0011 1111 0011 1111 0011 1111 uuuu uuuu pc ---- ---1 ---- ---1 ---- ---1 ---- ---1 ---- ---u note: u means unchanged x means unknown ht48ra0-2/HT48CA0-2 rev. 1.50 9 july 23, 2004 carrier the ht48ra0-2/HT48CA0-2 provides a carrier output which shares the pin with pc0. it can be selected to be a carrier output (rem) or level output pin (pc0) by code option. if the carrier output option is selected, setting pc0= 0 to enable carrier output and setting pc0= 1 to disable it at low level output. the clock source of the carrier is implemented by in - struction clock (system clock divided by 4) and pro - cessed by a frequency divider to yield various carry frequency. carry frequency= clock source m2 n where m=2 or 3 and n=0~3, both are selected by code option. if m=2, the duty cycle of the carrier output is 1 / 2 duty. if m=3, the duty cycle of the carrier output can be 1/2 duty or 1 / 3 duty also determined by code option (with the exception of n=0). detailed selection of the carrier duty is shown below: m 2 n duty cycle 2, 4, 8, 16 1 / 2 31 / 3 6, 12, 24 1 / 2or1 / 3 the following table shows examples of carrier fre- quency selection. f sys f carrier duty m 2 n 455khz 37.92khz 1 / 3 only 3 56.9khz 1 / 2 only 2 input/output ports there are an 8-bit bidirectional input/output port, a 4-bit input with 2-bit i/o port and one-bit output port in the ht48ra0-2/HT48CA0-2, labeled pa, pb and pc which are mapped to [12h], [14h], [16h] of the ram, respec - tively. each bit of pa can be selected as nmos output or schmitt trigger with pull-high resistor by software in - struction. pb0~pb1 have the same structure with pa, while pb2~pb5 can only be used for input operation (schmitt trigger with pull-high resistors). pc is only one-bit output port shares the pin with carrier output. if the level option is selected, the pc is cmos output. both pa and pb for the input operation, these ports are non-latched, that is, the inputs should be ready at the t2 rising edge of the instruction mov a, [m] (m=12h or 14h). for pa, pb0~pb1 and pc output operation, all data are latched and remain unchanged until the output latch is rewritten. when the pa and pb0~pb1 is used for input operation, it should be noted that before reading data from pads, a 1 should be written to the related bits to disable the nmos device. that is, the instruction set [m].i (i=0~7 for pa, i=0~1 for pb) is executed first to disable related nmos device, and then mov a, [m] to get stable data. after chip reset, pa and pb remain at a high level input line while pc remain at high level output, if the level op - tion is selected. each bit of pa, pb0~pb1 and pc output latches can be set or cleared by the set [m].i and clr [m].i (m=12h, 14h or 16h) instructions respectively. some instructions first input data and then follow the output operations. for example, set [m].i , clr [m] , cpl [m] , cpla [m] read the entire port states into the cpu, execute the defined operations (bit-operation), and then write the results back to the latches or to the accumulator. each line of pb has a wake-up capability to the device by code option. the highest seven bits of pc are not physically implemented, on reading them a 0 is re- turned and writing results in a no-operation. note: the bit 6 and bit 7 the pb register (14h) are un - used in the ht48ra0-2/HT48CA0-2, any read from that will return the value 0 . user should be very careful in transferring the program from the ht48ra0a or ht48ra0-1/ht48ca0-1 device to the ht48ra0-2/ HT48CA0-2 device. 1 < # 7 # 1 < ) * 8 2 : @ # # ? ) ) 2 , - # . # ? ! # " # : " : a $ # # ) $ # ? 7 # # 1 . 1 8 # 1 ) # # ) 2 # . 1 . 1 carrier/level output ht48ra0-2/HT48CA0-2 rev. 1.50 10 july 23, 2004 low voltage reset lvr the microcontroller provides low voltage reset circuit in order to monitor the supply voltage of the device. if the supply voltage of the device is within the range 0.9v~v lvr , such as changing a battery, the lvr will au- tomatically reset the device internally. the lvr includes the following specifications: the low voltage (0.9v~v lvr ) has to remain in their original state to exceed 1ms. if the low voltage state does not exceed 1ms, the lvr will ignore it and do not perform a reset function. the lvr uses the or function with the external res signal to perform chip reset. the relationship between v dd and v lvr is shown below. e ( e # @ + ! ? # # + < 1 1 : ? $ % & / $ % / # + < : ? # ? / $ % / # 1 pa, pb input/output lines # 1 1 : ? / % / 0 # @ # + < : ? # ? pb input lines 2 f 3 f 4 $ f 4 ht48ra0-2/HT48CA0-2 rev. 1.50 11 july 23, 2004 code option the following table shows eight kinds of code option in the ht48ra0-2/HT48CA0-2. all the code options must be de - fined to ensure proper system functioning. no. code option 1 wdt time-out period selection time-out period= 2 clock source n , where n=8~11. 2 wdt enable/disable selection. this option is to decide whether the wdt timer is enabled or disabled. 3 clr wdt times selection. this option defines how to clear the wdt by instruction. one time means that the clr wdt instruction can clear the wdt. two times means only if both of the clr wdt1 and clr wdt2 in- structions have been executed, the wdt can be cleared. 4 wake-up selection. this option defines the wake-up activity function. external input pins (pb only) all have the capability to wake-up the chip from a halt. 5 carrier/level output selection. this option defines the activity of pc0 to be carrier output or level output. 6 carry frequency selection. carry frequency= clock source (2 or 3) 2 n , where n=0~3. 7 carrier duty selection. there are two types of selection: 1 / 2 duty or 1 / 3 duty. if carrier frequency=clock source/(2, 4, 8 or 16), the duty cycle will be 1 / 2 duty. if carrier frequency=clock source/3, the duty cycle will be 1 / 3 duty. if carrier frequency=clock source/(6, 12 or 24), the duty cycle can be 1 / 2 duty or 1 / 3 duty. 8 system oscillator selection. rc or crystal oscillator. 9 lvr function: enable or disable 2 f 3 $ f 4 $ # 1 g g 6 1 # ? # # 1 low voltage reset note: *1 to make sure that the system oscillator has stabilized, the sst provides an extra delay of 1024 system clock pulses before entering the normal operation. *2 since low voltage has to be maintained in its original state and exceed 1ms, therefore 1ms delay enters the reset mode. application circuits note: it is recommended that a 100 f decoupling capacitor is placed between vss and vdd. the resistance and capacitance for reset circuit should be designed to ensure that the vdd is stable and re- mains in a valid range of the operating voltage before bringing res to high. the following table shows the c value according to different crystal values. (for reference only) crystal or resonator c 4mhz crystal 0pf 4mhz resonator 10pf 3.58mhz crystal 0pf 3.58mhz resonator 25pf 2mhz crystal & resonator 25pf 1mhz crystal 35pf 480khz resonator 300pf 455khz resonator 300pf 429khz resonator 300pf ht48ra0-2/HT48CA0-2 rev. 1.50 12 july 23, 2004 / / 2 / * / 0 & 3 0 * $ ) $ 2 / $ / % $ $ 1 7 # 6 8 $ f , $ $ < $ $ , instruction set summary mnemonic description instruction cycle flag affected arithmetic add a,[m] addm a,[m] add a,x adc a,[m] adcm a,[m] sub a,x sub a,[m] subm a,[m] sbc a,[m] sbcm a,[m] daa [m] add data memory to acc add acc to data memory add immediate data to acc add data memory to acc with carry add acc to data memory with carry subtract immediate data from acc subtract data memory from acc subtract data memory from acc with result in data memory subtract data memory from acc with carry subtract data memory from acc with carry and result in data memory decimal adjust acc for addition with result in data memory 1 1 (1) 1 1 1 (1) 1 1 1 (1) 1 1 (1) 1 (1) z,c,ac,ov z,c,ac,ov z,c,ac,ov z,c,ac,ov z,c,ac,ov z,c,ac,ov z,c,ac,ov z,c,ac,ov z,c,ac,ov z,c,ac,ov c logic operation and a,[m] or a,[m] xor a,[m] andm a,[m] orm a,[m] xorm a,[m] and a,x or a,x xor a,x cpl [m] cpla [m] and data memory to acc or data memory to acc exclusive-or data memory to acc and acc to data memory or acc to data memory exclusive-or acc to data memory and immediate data to acc or immediate data to acc exclusive-or immediate data to acc complement data memory complement data memory with result in acc 1 1 1 1 (1) 1 (1) 1 (1) 1 1 1 1 (1) 1 z z z z z z z z z z z increment & decrement inca [m] inc [m] deca [m] dec [m] increment data memory with result in acc increment data memory decrement data memory with result in acc decrement data memory 1 1 (1) 1 1 (1) z z z z rotate rra [m] rr [m] rrca [m] rrc [m] rla [m] rl [m] rlca [m] rlc [m] rotate data memory right with result in acc rotate data memory right rotate data memory right through carry with result in acc rotate data memory right through carry rotate data memory left with result in acc rotate data memory left rotate data memory left through carry with result in acc rotate data memory left through carry 1 1 (1) 1 1 (1) 1 1 (1) 1 1 (1) none none c c none none c c data move mov a,[m] mov [m],a mov a,x move data memory to acc move acc to data memory move immediate data to acc 1 1 (1) 1 none none none bit operation clr [m].i set [m].i clear bit of data memory set bit of data memory 1 (1) 1 (1) none none ht48ra0-2/HT48CA0-2 rev. 1.50 13 july 23, 2004 mnemonic description instruction cycle flag affected branch jmp addr sz [m] sza [m] sz [m].i snz [m].i siz [m] sdz [m] siza [m] sdza [m] call addr ret ret a,x jump unconditionally skip if data memory is zero skip if data memory is zero with data movement to acc skip if bit i of data memory is zero skip if bit i of data memory is not zero skip if increment data memory is zero skip if decrement data memory is zero skip if increment data memory is zero with result in acc skip if decrement data memory is zero with result in acc subroutine call return from subroutine return from subroutine and load immediate data to acc 2 1 (2) 1 (2) 1 (2) 1 (2) 1 (3) 1 (3) 1 (2) 1 (2) 2 2 2 none none none none none none none none none none none none table read tabrdc [m] tabrdl [m] read rom code (current page) to data memory and tblh read rom code (last page) to data memory and tblh 2 (1) 2 (1) none none miscellaneous nop clr [m] set [m] clr wdt clr wdt1 clr wdt2 swap [m] swapa [m] halt no operation clear data memory set data memory clear watchdog timer pre-clear watchdog timer pre-clear watchdog timer swap nibbles of data memory swap nibbles of data memory with result in acc enter power down mode 1 1 (1) 1 (1) 1 1 1 1 (1) 1 1 none none none to,pdf to (4) ,pdf (4) to (4) ,pdf (4) none none to,pdf note: x: immediate data m: data memory address a: accumulator i: 0~7 number of bits addr: program memory address : flag is affected : flag is not affected (1) : if a loading to the pcl register occurs, the execution cycle of instructions will be delayed for one more cycle (four system clocks). (2) : if a skipping to the next instruction occurs, the execution cycle of instructions will be delayed for one more cycle (four system clocks). otherwise the original instruction cycle is unchanged. (3) : (1) and (2) (4) : the flags may be affected by the execution status. if the watchdog timer is cleared by executing the clr wdt1 or clr wdt2 instruction, the to and pdf are cleared. otherwise the to and pdf flags remain unchanged. ht48ra0-2/HT48CA0-2 rev. 1.50 14 july 23, 2004 instruction definition adc a,[m] add data memory and carry to the accumulator description the contents of the specified data memory, accumulator and the carry flag are added si - multaneously, leaving the result in the accumulator. operation acc acc+[m]+c affected flag(s) to pdf ov z ac c adcm a,[m] add the accumulator and carry to data memory description the contents of the specified data memory, accumulator and the carry flag are added si - multaneously, leaving the result in the specified data memory. operation [m] acc+[m]+c affected flag(s) to pdf ov z ac c add a,[m] add data memory to the accumulator description the contents of the specified data memory and the accumulator are added. the result is stored in the accumulator. operation acc acc+[m] affected flag(s) to pdf ov z ac c add a,x add immediate data to the accumulator description the contents of the accumulator and the specified data are added, leaving the result in the accumulator. operation acc acc+x affected flag(s) to pdf ov z ac c addm a,[m] add the accumulator to the data memory description the contents of the specified data memory and the accumulator are added. the result is stored in the data memory. operation [m] acc+[m] affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 15 july 23, 2004 and a,[m] logical and accumulator with data memory description data in the accumulator and the specified data memory perform a bitwise logical_and op - eration. the result is stored in the accumulator. operation acc acc and [m] affected flag(s) to pdf ov z ac c and a,x logical and immediate data to the accumulator description data in the accumulator and the specified data perform a bitwise logical_and operation. the result is stored in the accumulator. operation acc acc and x affected flag(s) to pdf ov z ac c andm a,[m] logical and data memory with the accumulator description data in the specified data memory and the accumulator perform a bitwise logical_and op - eration. the result is stored in the data memory. operation [m] acc and [m] affected flag(s) to pdf ov z ac c call addr subroutine call description the instruction unconditionally calls a subroutine located at the indicated address. the program counter increments once to obtain the address of the next instruction, and pushes this onto the stack. the indicated address is then loaded. program execution continues with the instruction at this address. operation stack pc+1 pc addr affected flag(s) to pdf ov z ac c clr [m] clear data memory description the contents of the specified data memory are cleared to 0. operation [m] 00h affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 16 july 23, 2004 clr [m].i clear bit of data memory description the bit i of the specified data memory is cleared to 0. operation [m].i 0 affected flag(s) to pdf ov z ac c clr wdt clear watchdog timer description the wdt is cleared (clears the wdt). the power down bit (pdf) and time-out bit (to) are cleared. operation wdt 00h pdf and to 0 affected flag(s) to pdf ov z ac c 00 clr wdt1 preclear watchdog timer description together with clr wdt2, clears the wdt. pdf and to are also cleared. only execution of this instruction without the other preclear instruction just sets the indicated flag which im - plies this instruction has been executed and the to and pdf flags remain unchanged. operation wdt 00h* pdf and to 0* affected flag(s) to pdf ov z ac c 0* 0* clr wdt2 preclear watchdog timer description together with clr wdt1, clears the wdt. pdf and to are also cleared. only execution of this instruction without the other preclear instruction, sets the indicated flag which im- plies this instruction has been executed and the to and pdf flags remain unchanged. operation wdt 00h* pdf and to 0* affected flag(s) to pdf ov z ac c 0* 0* cpl [m] complement data memory description each bit of the specified data memory is logically complemented (1 s complement). bits which previously containe d a 1 are changed to 0 and vice-versa. operation [m] [m ] affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 17 july 23, 2004 cpla [m] complement data memory and place result in the accumulator description each bit of the specified data memory is logically complemented (1 s complement). bits which previously contained a 1 are changed to 0 and vice-versa. the complemented result is stored in the accumulator and the contents of the data memory remain unchanged. operation acc [m ] affected flag(s) to pdf ov z ac c daa [m] decimal-adjust accumulator for addition description the accumulator value is adjusted to the bcd (binary coded decimal) code. the accumu - lator is divided into two nibbles. each nibble is adjusted to the bcd code and an internal carry (ac1) will be done if the low nibble of the accumulator is greater than 9. the bcd ad - justment is done by adding 6 to the original value if the original value is greater than 9 or a carry (ac or c) is set; otherwise the original value remains unchanged. the result is stored in the data memory and only the carry flag (c) may be affected. operation if acc.3~acc.0 >9 or ac=1 then [m].3~[m].0 (acc.3~acc.0)+6, ac1=ac else [m].3~[m].0 (acc.3~acc.0), ac1=0 and if acc.7~acc.4+ac1 >9 or c=1 then [m].7~[m].4 acc.7~acc.4+6+ac1,c=1 else [m].7~[m].4 acc.7~acc.4+ac1,c=c affected flag(s) to pdf ov z ac c dec [m] decrement data memory description data in the specified data memory is decremented by 1. operation [m] [m] 1 affected flag(s) to pdf ov z ac c deca [m] decrement data memory and place result in the accumulator description data in the specified data memory is decremented by 1, leaving the result in the accumula - tor. the contents of the data memory remain unchanged. operation acc [m] 1 affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 18 july 23, 2004 halt enter power down mode description this instruction stops program execution and turns off the system clock. the contents of the ram and registers are retained. the wdt and prescaler are cleared. the power down bit (pdf) is set and the wdt time-out bit (to) is cleared. operation pc pc+1 pdf 1 to 0 affected flag(s) to pdf ov z ac c 01 inc [m] increment data memory description data in the specified data memory is incremented by 1 operation [m] [m]+1 affected flag(s) to pdf ov z ac c inca [m] increment data memory and place result in the accumulator description data in the specified data memory is incremented by 1, leaving the result in the accumula - tor. the contents of the data memory remain unchanged. operation acc [m]+1 affected flag(s) to pdf ov z ac c jmp addr directly jump description the program counter are replaced with the directly-specified address unconditionally, and control is passed to this destination. operation pc addr affected flag(s) to pdf ov z ac c mov a,[m] move data memory to the accumulator description the contents of the specified data memory are copied to the accumulator. operation acc [m] affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 19 july 23, 2004 mov a,x move immediate data to the accumulator description the 8-bit data specified by the code is loaded into the accumulator. operation acc x affected flag(s) to pdf ov z ac c mov [m],a move the accumulator to data memory description the contents of the accumulator are copied to the specified data memory (one of the data memories). operation [m] acc affected flag(s) to pdf ov z ac c nop no operation description no operation is performed. execution continues with the next instruction. operation pc pc+1 affected flag(s) to pdf ov z ac c or a,[m] logical or accumulator with data memory description data in the accumulator and the specified data memory (one of the data memories) per- form a bitwise logical_or operation. the result is stored in the accumulator. operation acc acc or [m] affected flag(s) to pdf ov z ac c or a,x logical or immediate data to the accumulator description data in the accumulator and the specified data perform a bitwise logical_or operation. the result is stored in the accumulator. operation acc acc or x affected flag(s) to pdf ov z ac c orm a,[m] logical or data memory with the accumulator description data in the data memory (one of the data memories) and the accumulator perform a bitwise logical_or operation. the result is stored in the data memory. operation [m] acc or [m] affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 20 july 23, 2004 ret return from subroutine description the program counter is restored from the stack. this is a 2-cycle instruction. operation pc stack affected flag(s) to pdf ov z ac c ret a,x return and place immediate data in the accumulator description the program counter is restored from the stack and the accumulator loaded with the speci - fied 8-bit immediate data. operation pc stack acc x affected flag(s) to pdf ov z ac c rl [m] rotate data memory left description the contents of the specified data memory are rotated 1 bit left with bit 7 rotated into bit 0. operation [m].(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) [m].0 [m].7 affected flag(s) to pdf ov z ac c rla [m] rotate data memory left and place result in the accumulator description data in the specified data memory is rotated 1 bit left with bit 7 rotated into bit 0, leaving the rotated result in the accumulator. the contents of the data memory remain unchanged. operation acc.(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) acc.0 [m].7 affected flag(s) to pdf ov z ac c rlc [m] rotate data memory left through carry description the contents of the specified data memory and the carry flag are rotated 1 bit left. bit 7 re - places the carry bit; the original carry flag is rotated into the bit 0 position. operation [m].(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) [m].0 c c [m].7 affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 21 july 23, 2004 rlca [m] rotate left through carry and place result in the accumulator description data in the specified data memory and the carry flag are rotated 1 bit left. bit 7 replaces the carry bit and the original carry flag is rotated into bit 0 position. the rotated result is stored in the accumulator but the contents of the data memory remain unchanged. operation acc.(i+1) [m].i; [m].i:bit i of the data memory (i=0~6) acc.0 c c [m].7 affected flag(s) to pdf ov z ac c rr [m] rotate data memory right description the contents of the specified data memory are rotated 1 bit right with bit 0 rotated to bit 7. operation [m].i [m].(i+1); [m].i:bit i of the data memory (i=0~6) [m].7 [m].0 affected flag(s) to pdf ov z ac c rra [m] rotate right and place result in the accumulator description data in the specified data memory is rotated 1 bit right with bit 0 rotated into bit 7, leaving the rotated result in the accumulator. the contents of the data memory remain unchanged. operation acc.(i) [m].(i+1); [m].i:bit i of the data memory (i=0~6) acc.7 [m].0 affected flag(s) to pdf ov z ac c rrc [m] rotate data memory right through carry description the contents of the specified data memory and the carry flag are together rotated 1 bit right. bit 0 replaces the carry bit; the original carry flag is rotated into the bit 7 position. operation [m].i [m].(i+1); [m].i:bit i of the data memory (i=0~6) [m].7 c c [m].0 affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 22 july 23, 2004 rrca [m] rotate right through carry and place result in the accumulator description data of the specified data memory and the carry flag are rotated 1 bit right. bit 0 replaces the carry bit and the original carry flag is rotated into the bit 7 position. the rotated result is stored in the accumulator. the contents of the data memory remain unchanged. operation acc.i [m].(i+1); [m].i:bit i of the data memory (i=0~6) acc.7 c c [m].0 affected flag(s) to pdf ov z ac c sbc a,[m] subtract data memory and carry from the accumulator description the contents of the specified data memory and the complement of the carry flag are sub - tracted from the accumulator, leaving the result in the accumulator. operation acc acc+[m ]+c affected flag(s) to pdf ov z ac c sbcm a,[m] subtract data memory and carry from the accumulator description the contents of the specified data memory and the complement of the carry flag are sub - tracted from the accumulator, leaving the result in the data memory. operation [m] acc+[m ]+c affected flag(s) to pdf ov z ac c sdz [m] skip if decrement data memory is 0 description the contents of the specified data memory are decremented by 1. if the result is 0, the next instruction is skipped. if the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruc - tion (2 cycles). otherwise proceed with the next instruction (1 cycle). operation skip if ([m] 1)=0, [m] ([m] 1) affected flag(s) to pdf ov z ac c sdza [m] decrement data memory and place result in acc, skip if 0 description the contents of the specified data memory are decremented by 1. if the result is 0, the next instruction is skipped. the result is stored in the accumulator but the data memory remains unchanged. if the result is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cy - cles). otherwise proceed with the next instruction (1 cycle). operation skip if ([m] 1)=0, acc ([m] 1) affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 23 july 23, 2004 set [m] set data memory description each bit of the specified data memory is set to 1. operation [m] ffh affected flag(s) to pdf ov z ac c set [m]. i set bit of data memory description bit i of the specified data memory is set to 1. operation [m].i 1 affected flag(s) to pdf ov z ac c siz [m] skip if increment data memory is 0 description the contents of the specified data memory are incremented by 1. if the result is 0, the fol - lowing instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). otherwise proceed with the next instruction (1 cycle). operation skip if ([m]+1)=0, [m] ([m]+1) affected flag(s) to pdf ov z ac c siza [m] increment data memory and place result in acc, skip if 0 description the contents of the specified data memory are incremented by 1. if the result is 0, the next instruction is skipped and the result is stored in the accumulator. the data memory re- mains unchanged. if the result is 0, the following instruction, fetched during the current in- struction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). otherwise proceed with the next instruction (1 cycle). operation skip if ([m]+1)=0, acc ([m]+1) affected flag(s) to pdf ov z ac c snz [m].i skip if bit i of the data memory is not 0 description if bit i of the specified data memory is not 0, the next instruction is skipped. if bit i of the data memory is not 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). other - wise proceed with the next instruction (1 cycle). operation skip if [m].i 0 affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 24 july 23, 2004 sub a,[m] subtract data memory from the accumulator description the specified data memory is subtracted from the contents of the accumulator, leaving the result in the accumulator. operation acc acc+[m ]+1 affected flag(s) to pdf ov z ac c subm a,[m] subtract data memory from the accumulator description the specified data memory is subtracted from the contents of the accumulator, leaving the result in the data memory. operation [m] acc+[m ]+1 affected flag(s) to pdf ov z ac c sub a,x subtract immediate data from the accumulator description the immediate data specified by the code is subtracted from the contents of the accumula - tor, leaving the result in the accumulator. operation acc acc+x +1 affected flag(s) to pdf ov z ac c swap [m] swap nibbles within the data memory description the low-order and high-order nibbles of the specified data memory (1 of the data memo- ries) are interchanged. operation [m].3~[m].0 [m].7~[m].4 affected flag(s) to pdf ov z ac c swapa [m] swap data memory and place result in the accumulator description the low-order and high-order nibbles of the specified data memory are interchanged, writ - ing the result to the accumulator. the contents of the data memory remain unchanged. operation acc.3~acc.0 [m].7~[m].4 acc.7~acc.4 [m].3~[m].0 affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 25 july 23, 2004 sz [m] skip if data memory is 0 description if the contents of the specified data memory are 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). otherwise proceed with the next instruction (1 cycle). operation skip if [m]=0 affected flag(s) to pdf ov z ac c sza [m] move data memory to acc, skip if 0 description the contents of the specified data memory are copied to the accumulator. if the contents is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruction (2 cycles). otherwise proceed with the next instruction (1 cycle). operation skip if [m]=0 affected flag(s) to pdf ov z ac c sz [m].i skip if bit i of the data memory is 0 description if bit i of the specified data memory is 0, the following instruction, fetched during the current instruction execution, is discarded and a dummy cycle is replaced to get the proper instruc - tion (2 cycles). otherwise proceed with the next instruction (1 cycle). operation skip if [m].i=0 affected flag(s) to pdf ov z ac c tabrdc [m] move the rom code (current page) to tblh and data memory description the low byte of rom code (current page) addressed by the table pointer (tblp) is moved to the specified data memory and the high byte transferred to tblh directly. operation [m] rom code (low byte) tblh rom code (high byte) affected flag(s) to pdf ov z ac c tabrdl [m] move the rom code (last page) to tblh and data memory description the low byte of rom code (last page) addressed by the table pointer (tblp) is moved to the data memory and the high byte transferred to tblh directly. operation [m] rom code (low byte) tblh code (high byte) affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 26 july 23, 2004 xor a,[m] logical xor accumulator with data memory description data in the accumulator and the indicated data memory perform a bitwise logical exclu - sive_or operation and the result is stored in the accumulator. operation acc acc xor [m] affected flag(s) to pdf ov z ac c xorm a,[m] logical xor data memory with the accumulator description data in the indicated data memory and the accumulator perform a bitwise logical exclu - sive_or operation. the result is stored in the data memory. the 0 flag is affected. operation [m] acc xor [m] affected flag(s) to pdf ov z ac c xor a,x logical xor immediate data to the accumulator description data in the accumulator and the specified data perform a bitwise logical exclusive_or op - eration. the result is stored in the accumulator. the 0 flag is affected. operation acc acc xor x affected flag(s) to pdf ov z ac c ht48ra0-2/HT48CA0-2 rev. 1.50 27 july 23, 2004 package information 20-pin sop (300mil) outline dimensions symbol dimensions in mil min. nom. max. a 394 419 b 290 300 c14 20 c 490 510 d92 104 e 50 f4 g32 38 h4 12 0 10 ht48ra0-2/HT48CA0-2 rev. 1.50 28 july 23, 2004 $ $ / , h = 20-pin ssop (150mil) outline dimensions symbol dimensions in mil min. nom. max. a 228 244 b 150 158 c8 12 c 335 347 d49 65 e 25 f4 10 g15 50 h7 10 0 8 ht48ra0-2/HT48CA0-2 rev. 1.50 29 july 23, 2004 $ $ / , h = product tape and reel specifications reel dimensions sop 20w symbol description dimensions in mm a reel outer diameter 330 1.0 b reel inner diameter 62 1.5 c spindle hole diameter 13.0+0.5 0.2 d key slit width 2.0 0.5 t1 space between flange 24.8+0.3 0.2 t2 reel thickness 30.2 0.2 ssop 20s (150mil) symbol description dimensions in mm a reel outer diameter 330 1.0 b reel inner diameter 62 1.5 c spindle hole diameter 13.0+0.5 0.2 d key slit width 2.0 0.5 t1 space between flange 16.8+0.3 0.2 t2 reel thickness 22.2 0.2 ht48ra0-2/HT48CA0-2 rev. 1.50 30 july 23, 2004 / carrier tape dimensions sop 20w symbol description dimensions in mm w carrier tape width 24.0+0.3 0.1 p cavity pitch 12.0 0.1 e perforation position 1.75 0.1 f cavity to perforation (width direction) 11.5 0.1 d perforation diameter 1.5+0.1 d1 cavity hole diameter 1.5+0.25 p0 perforation pitch 4.0 0.1 p1 cavity to perforation (length direction) 2.0 0.1 a0 cavity length 10.8 0.1 b0 cavity width 13.3 0.1 k0 cavity depth 3.2 0.1 t carrier tape thickness 0.3 0.05 c cover tape width 21.3 ssop 20s (150mil) symbol description dimensions in mm w carrier tape width 16.0+0.3 0.1 p cavity pitch 8.0 0.1 e perforation position 1.75 0.1 f cavity to perforation (width direction) 7.5 0.1 d perforation diameter 1.5+0.1 d1 cavity hole diameter 1.5+0.25 p0 perforation pitch 4.0 0.1 p1 cavity to perforation (length direction) 2.0 0.1 a0 cavity length 6.5 0.1 b0 cavity width 9.0 0.1 k0 cavity depth 2.3 0.1 t carrier tape thickness 0.30 0.05 c cover tape width 13.3 ht48ra0-2/HT48CA0-2 rev. 1.50 31 july 23, 2004 + $ , ( $ / $ $ ht48ra0-2/HT48CA0-2 rev. 1.50 32 july 23, 2004 copyright 2004 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek as - sumes no responsibility arising from the use of the specifications described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek s products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notification. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw. holtek semiconductor inc. (headquarters) no.3, creation rd. ii, science park, hsinchu, taiwan tel: 886-3-563-1999 fax: 886-3-563-1189 http://www.holtek.com.tw holtek semiconductor inc. (taipei sales office) 4f-2, no. 3-2, yuanqu st., nankang software park, taipei 115, taiwan tel: 886-2-2655-7070 fax: 886-2-2655-7373 fax: 886-2-2655-7383 (international sales hotline) holtek semiconductor inc. (shanghai sales office) 7th floor, building 2, no.889, yi shan rd., shanghai, china 200233 tel: 021-6485-5560 fax: 021-6485-0313 http://www.holtek.com.cn holtek semiconductor inc. (shenzhen sales office) 43f, seg plaza, shen nan zhong road, shenzhen, china 518031 tel: 0755-8346-5589 fax: 0755-8346-5590 isdn: 0755-8346-5591 holtek semiconductor inc. (beijing sales office) suite 1721, jinyu tower, a129 west xuan wu men street, xicheng district, beijing, china 100031 tel: 010-6641-0030, 6641-7751, 6641-7752 fax: 010-6641-0125 holmate semiconductor, inc. (north america sales office) 46712 fremont blvd., fremont, ca 94538 tel: 510-252-9880 fax: 510-252-9885 http://www.holmate.com |
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