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8271gs?avr?02/2013 features ? h igh performance, low power atmel ? avr ? 8-bit microcontroller family ? advanced risc architecture ? 131 powerful instructions ? most single clock cycle execution ? 32 x 8 general purpose working registers ? fully static operation ? up to 20 mips throughput at 20mhz ? on-chip 2-cycle multiplier ? high endurance non-volatile memory segments ? 4/8/16/32kbytes of in-system self-programmable flash program memory ? 256/512/512/1kbytes eeprom ? 512/1k/1k/2kbytes internal sram ? write/erase cycles: 10,000 flash/100,000 eeprom ? data retention: 20 years at 85 ? c/100 years at 25 ? c (1) ? optional boot code section with independent lock bits in-system programming by on-chip boot program true read-while-write operation ? programming lock for software security ? atmel ? qtouch ? library support ? capacitive touch buttons, sliders and wheels ? qtouch and qmatrix ? acquisition ? up to 64 sense channels ? peripheral features ? two 8-bit timer/counters with separate prescaler and compare mode ? one 16-bit timer/counter with separate prescaler, compare mode, and capture mode ? real time counter with separate oscillator ? six pwm channels ? 8-channel 10-bit adc in tqfp and qfn/mlf package temperature measurement ? 6-channel 10-bit adc in pdip package temperature measurement ? programmable serial usart ? master/slave spi serial interface ? byte-oriented 2-wire serial interface (philips i 2 c compatible) ? programmable watchdog timer with separate on-chip oscillator ? on-chip analog comparator ? interrupt and wake-up on pin change ? special microcontroller features ? power-on reset and programmable brown-out detection ? internal calibrated oscillator ? external and internal interrupt sources ? six sleep modes: idle, adc noise reduction, power-save, power-down, standby, and extended standby ? i/o and packages ? 23 programmable i/o lines ? 28-pin pdip, 32-lead tqfp, 28-pad qfn/mlf and 32-pad qfn/mlf ? operating voltage: ? 1.8 - 5.5v ? temperature range: ?-40 ? c to 85 ? c ? speed grade: ? 0 - 4mhz@1.8 - 5.5v, 0 - 10mhz@2.7 - 5.5.v, 0 - 20mhz @ 4.5 - 5.5v ? power consumption at 1mhz, 1.8v, 25 ? c ? active mode: 0.2ma ? power-down mode: 0.1a ? power-save mode: 0.75a (including 32khz rtc) atmel 8-bit microcontroller with 4/8/16/32kbytes in- system programmable flash atmega48a; atmega48pa; atmega88a; atmega88pa; atmega168a; atmega168pa; atmega328; atmega328p summary
2 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 1. pin configurations figure 1-1. pinout atmega48a/pa/ 88a/pa/168a/pa/328/p 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 (pcint19/oc2b/int1) pd3 (pcint20/xck/t0) pd4 gnd vcc gnd vcc (pcint6/xtal1/tosc1) pb6 (pcint7/xtal2/tosc2) pb7 pc1 (adc1/pcint9) pc0 (adc0/pcint8) adc7 gnd aref adc6 avcc pb5 (sck/pcint5) 32 31 30 29 28 27 26 25 9 10 11 12 13 14 15 16 (pcint21/oc0b/t1) pd5 (pcint22/oc0a/ain0) pd6 (pcint23/ain1) pd7 (pcint0/clko/icp1) pb0 (pcint1/oc1a) pb1 (pcint2/ss/oc1b) pb2 (pcint3/oc2a/mosi) pb3 (pcint4/miso) pb4 pd2 (int0/pcint18) pd1 (txd/pcint17) pd0 (rxd/pcint16) pc6 (reset/pcint14) pc5 (adc5/scl/pcint13) pc4 (adc4/sda/pcint12) pc3 (adc3/pcint11) pc2 (adc2/pcint10) 32 tqfp top view 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 (pcint14/reset) pc6 (pcint16/rxd) pd0 (pcint17/txd) pd1 (pcint18/int0) pd2 (pcint19/oc2b/int1) pd3 (pcint20/xck/t0) pd4 vcc gnd (pcint6/xtal1/tosc1) pb6 (pcint7/xtal2/tosc2) pb7 (pcint21/oc0b/t1) pd5 (pcint22/oc0a/ain0) pd6 (pcint23/ain1) pd7 (pcint0/clko/icp1) pb0 pc5 (adc5/scl/pcint13) pc4 (adc4/sda/pcint12) pc3 (adc3/pcint11) pc2 (adc2/pcint10) pc1 (adc1/pcint9) pc0 (adc0/pcint8) gnd aref avcc pb5 (sck/pcint5) pb4 (miso/pcint4) pb3 (mosi/oc2a/pcint3) pb2 (ss/oc1b/pcint2) pb1 (oc1a/pcint1) 28 pdip 1 2 3 4 5 6 7 8 24 23 22 21 20 19 18 17 32 31 30 29 28 27 26 25 9 10 11 12 13 14 15 16 32 mlf top view (pcint19/oc2b/int1) pd3 (pcint20/xck/t0) pd4 gnd vcc gnd vcc (pcint6/xtal1/tosc1) pb6 (pcint7/xtal2/tosc2) pb7 pc1 (adc1/pcint9) pc0 (adc0/pcint8) adc7 gnd aref adc6 avcc pb5 (sck/pcint5) (pcint21/oc0b/t1) pd5 (pcint22/oc0a/ain0) pd6 (pcint23/ain1) pd7 (pcint0/clko/icp1) pb0 (pcint1/oc1a) pb1 (pcint2/ss/oc1b) pb2 (pcint3/oc2a/mosi) pb3 (pcint4/miso) pb4 pd2 (int0/pcint18) pd1 (txd/pcint17) pd0 (rxd/pcint16) pc6 (reset/pcint14) pc5 (adc5/scl/pcint13) pc4 (adc4/sda/pcint12) pc3 (adc3/pcint11) pc2 (adc2/pcint10) note: bottom pad should be soldered to ground. 1 2 3 4 5 6 7 21 20 19 18 17 16 15 28 27 26 25 24 23 22 8 9 10 11 12 13 14 28 mlf top view (pcint19/oc2b/int1) pd3 (pcint20/xck/t0) pd4 vcc gnd (pcint6/xtal1/tosc1) pb6 (pcint7/xtal2/tosc2) pb7 (pcint21/oc0b/t1) pd5 (pcint22/oc0a/ain0) pd6 (pcint23/ain1) pd7 (pcint0/clko/icp1) pb0 (pcint1/oc1a) pb1 (pcint2/ss/oc1b) pb2 (pcint3/oc2a/mosi) pb3 (pcint4/miso) pb4 pd2 (int0/pcint18) pd1 (txd/pcint17) pd0 (rxd/pcint16) pc6 (reset/pcint14) pc5 (adc5/scl/pcint13) pc4 (adc4/sda/pcint12) pc3 (adc3/pcint11) pc2 (adc2/pcint10) pc1 (adc1/pcint9) pc0 (adc0/pcint8) gnd aref avcc pb5 (sck/pcint5) note: bottom pad should be soldered to ground. table 1-1. 32ufbga - pinout atmega48a/48pa/88a/88pa/168a/168pa 123456 a pd2 pd1 pc6 pc4 pc2 pc1 b pd3 pd4 pd0 pc5 pc3 pc0 c gnd gnd adc7 gnd d vdd vdd aref adc6 e pb6 pd6 pb0 pb2 avdd pb5 f pb7 pd5 pd7 pb1 pb3 pb4
3 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 1.1 pin descriptions 1.1.1 vcc digital supply voltage. 1.1.2 gnd ground. 1.1.3 port b (pb7:0) xtal1/xtal2/tosc1/tosc2 port b is an 8-bit bi-directional i/o port with internal pull-up resistors (selected for each bit). the port b output buf- fers have symmetrical drive ch aracteristics with both high si nk and source capability. as i nputs, port b pins that are externally pulled low will source current if the pull-up resistor s are activated. the port b pins are tri-stated when a reset condition becomes active, even if the clock is not running. depending on the cl ock selection fuse settings, pb6 can be used as input to the in verting oscillator amplifier and input to the internal clock operating circuit. depending on the clock selection fuse settings, pb7 can be used as output fr om the inverting o scillator amplifier. if the internal calibrated rc oscillator is used as chip clock source, pb7...6 is used as tosc2...1 input for the asynchronous timer/counter2 if the as2 bit in assr is set. the various special features of port b are elaborated in ?alternate functions of port b? on page 83 and ?system clock and clock options? on page 26 . 1.1.4 port c (pc5:0) port c is a 7-bit bi-directional i/o port with internal pull- up resistors (selected for each bit). the pc5...0 output buf- fers have symmetrical drive characteristi cs with both high sink and source capability. as input s, port c pins that are externally pulled low will source current if the pull-up resistors are activate d. the port c pins are tri-stated when a reset condition becomes active, even if the clock is not running. 1.1.5 pc6/reset if the rstdisbl fuse is programmed, pc6 is used as an i/o pin. note that the electrical characteristics of pc6 dif- fer from those of the other pins of port c. if the rstdisbl fuse is unprogrammed, pc6 is used as a reset input. a low level on th is pin for longer than the minimum pulse length will generate a reset, even if the clock is not running. the minimum pulse length is given in table 29-12 on page 310 . shorter pulses are not guaranteed to generate a reset. the various special features of port c are elaborated in ?alternate functions of port c? on page 86 . 1.1.6 port d (pd7:0) port d is an 8-bit bi-directional i/o port with internal pull- up resistors (selected for each bit). the port d output buf- fers have symmetrical drive characteristi cs with both high sink and source capability. as input s, port d pins that are externally pulled low will source current if the pull-up resistors are activate d. the port d pins are tri-stated when a reset condition becomes active, even if the clock is not running. the various special features of port d are elaborated in ?alternate functions of port d? on page 89 . 1.1.7 av cc av cc is the supply voltage pin for the a/d converter, pc3:0, and adc7:6. it should be externally connected to v cc , even if the adc is not used. if the ad c is used, it should be connected to v cc through a low-pass filter. note that pc6...4 use digital supply voltage, v cc .
4 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 1.1.8 aref aref is the analog reference pin for the a/d converter. 1.1.9 adc7:6 (tqfp and qfn/mlf package only) in the tqfp and qfn/mlf package, adc7:6 serve as anal og inputs to the a/d conver ter. these pins are powered from the analog supply and serve as 10-bit adc channels.
5 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 2. overview the atmega48a/pa/88a/pa/168a/pa/328/p is a low-power cmos 8-bit microcontroller based on the avr enhanced risc architecture. by executing powerful instructions in a single clock cycle, the atmega48a/pa/88a/pa/168a/pa/ 328/p achieves throughputs approach ing 1 mips per mhz allowing the system designer to optimize power consumption versus processing speed. 2.1 block diagram figure 2-1. block diagram the avr core combines a rich instruction set with 32 general purpose working registers. all the 32 registers are directly connected to the arithmetic logic unit (alu), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. the result ing architecture is more c ode efficient while achieving throughputs up to ten times faster than conventional cisc microcontrollers. port c (7) port b (8) port d (8) usart 0 8bit t/c 2 16bit t/c 1 8bit t/c 0 a/d conv. internal bandgap analog comp. spi twi sram flash eeprom watchdog oscillator watchdog timer oscillator circuits / clock generation power supervision por / bod & reset vcc gnd program logic debugwire 2 gnd aref avcc data b u s adc[6..7] pc[0..6] pb[0..7] pd[0..7] 6 reset xtal[1..2] cpu
6 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 the atmega48a/pa/88a/pa/168a/pa/328/p provides the fo llowing features: 4k/8kbytes of in-system program- mable flash with read-while-write capabilities, 256/ 512/512/1kbytes eeprom, 512/1k/1k/2kbytes sram, 23 general purpose i/o lines, 32 general purpose working regist ers, three flexible timer/counters with compare modes, internal and external interrupts, a serial programmable usart, a byte-oriented 2-wire serial interface, an spi serial port, a 6-channel 10-bit adc (8 channels in tqfp and qfn/mlf packages), a programmable watchdog timer with internal oscillator, and five software selectable power saving modes. the idle mode stops the cpu while allowing the sram, timer/counters, usart, 2-wire se rial interface, spi port, and interrupt system to con- tinue functioning. the power-down mode saves the register contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hardware reset. in power-save mode, the asynchronous timer continues to run, allowing the user to maintain a timer base while th e rest of the device is sleeping. the adc noise reduction mode stops the cpu and all i/o modules except asynchrono us timer and adc, to minimize switching noise during adc conversions. in standby mode, the crystal/r esonator oscillator is running while the rest of th e device is sleep- ing. this allows very fast start-up combined with low power consumption. atmel ? offers the qtouch ? library for embedding capacitive touch buttons, sliders and wheels functionality into avr ? microcontrollers. the patented charge-tr ansfer signal acquisition offers robust sensing and includes fully debounced reporting of touch keys and includes adjacent key suppression ? (aks ? ) technology for unambiguous detection of key events. the easy-to-use qtouch suite toolchain allows you to explore, develop and debug your own touch applications. the device is manufactured using atmel?s high density non- volatile memory technology. the on-chip isp flash allows the program memory to be reprogrammed in-system through an spi serial interface, by a conventional non- volatile memory programmer, or by an on-chip boot program running on the avr core. the boot program can use any interface to download the application program in the application flash memory. software in the boot flash section will continue to run while the application flash section is updated, providing true read-while-write opera- tion. by combining an 8-bit risc cpu with in-system self-programmable flash on a monolithic chip, the atmel atmega48a/pa/88a/pa/168a/pa/328/p is a powerful microcontroller that provides a highly flexible and cost effec- tive solution to many embedded control applications. the atmega48a/pa/88a/pa/168a/pa/328/p avr is supported with a full suite of program and system develop- ment tools including: c compilers, macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits. 2.2 comparison between processors the atmega48a/pa/88a/pa/168a/pa/328/p differ only in memory sizes, boot loader support, and interrupt vector sizes. table 2-1 summarizes the different memory and interrupt vector sizes for the devices. atmega48a/pa/88a/pa/168a/pa/328/p support a real read-while-write self-programming mechanism. there is a separate boot loader section, and the spm instruction can only execute from there. in atmega 48a/48pa there table 2-1. memory size summary device flash eeprom ram interrupt vector size atmega48a 4kbytes 256bytes 512bytes 1 instruction word/vector atmega48pa 4kbytes 256bytes 512bytes 1 instruction word/vector atmega88a 8kbytes 512bytes 1kbytes 1 instruction word/vector atmega88pa 8kbytes 512bytes 1kbytes 1 instruction word/vector atmega168a 16kbytes 512bytes 1kbytes 2 instruction words/vector atmega168pa 16kbytes 512bytes 1kbytes 2 instruction words/vector atmega328 32kbytes 1kbytes 2kbyte s 2 instruction words/vector atmega328p 32kbytes 1kbytes 2kbytes 2 instruction words/vector
7 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 is no read-while-write support and no separate boot loader section. the spm instruction can execute from the entire flash 3. resources a comprehensive set of development tools, applicati on notes and datasheets are available for download on http://www.atmel.com/avr. note: 1. 4. data retention reliability qualification re sults show that the projected data retention fa ilure rate is much less than 1 ppm over 20 years at 85c or 100 years at 25c. 5. about code examples this documentation contains simple code examples that br iefly show how to use various parts of the device. these code examples assume that the part specific header file is included before compilation. be aware that not all c compiler vendors include bit definitions in the header files and interrupt handling in c is compiler dependent. please confirm with the c compiler documentation for more details. for i/o registers located in extended i/o map, ?in?, ?out?, ?sbis?, ?sbic?, ?cbi?, and ?sbi? instructions must be replaced with instructions that allow access to ex tended i/o. typically ?lds? and ?sts? combined with ?sbrs?, ?sbrc?, ?sbr?, and ?cbr?. 6. capacitive touch sensing the atmel ? qtouch ? library provides a simple to use solution to realize touch sens itive interfaces on most atmel avr ? microcontrollers. the qtouch library includes support for the atmel qtouch and atmel qmatrix ? acquisition methods. touch sensing can be added to any application by linki ng the appropriate atmel qtouch library for the avr micro- controller. this is done by using a si mple set of apis to define the touch ch annels and sensors, and then calling the touch sensing api?s to retrieve the channel information and determine the touch sensor states. the qtouch library is free and downloadable from the atmel website at the following location: www.atmel.com/qtouchlibrary . for implementation details and other information, refer to the atmel qtouch library user guide - also available for download from atmel website.
8 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 7. register summary address name bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 page (0xff) reserved ? ? ? ? ? ? ? ? (0xfe) reserved ? ? ? ? ? ? ? ? (0xfd) reserved ? ? ? ? ? ? ? ? (0xfc) reserved ? ? ? ? ? ? ? ? (0xfb) reserved ? ? ? ? ? ? ? ? (0xfa) reserved ? ? ? ? ? ? ? ? (0xf9) reserved ? ? ? ? ? ? ? ? (0xf8) reserved ? ? ? ? ? ? ? ? (0xf7) reserved ? ? ? ? ? ? ? ? (0xf6) reserved ? ? ? ? ? ? ? ? (0xf5) reserved ? ? ? ? ? ? ? ? (0xf4) reserved ? ? ? ? ? ? ? ? (0xf3) reserved ? ? ? ? ? ? ? ? (0xf2) reserved ? ? ? ? ? ? ? ? (0xf1) reserved ? ? ? ? ? ? ? ? (0xf0) reserved ? ? ? ? ? ? ? ? (0xef) reserved ? ? ? ? ? ? ? ? (0xee) reserved ? ? ? ? ? ? ? ? (0xed) reserved ? ? ? ? ? ? ? ? (0xec) reserved ? ? ? ? ? ? ? ? (0xeb) reserved ? ? ? ? ? ? ? ? (0xea) reserved ? ? ? ? ? ? ? ? (0xe9) reserved ? ? ? ? ? ? ? ? (0xe8) reserved ? ? ? ? ? ? ? ? (0xe7) reserved ? ? ? ? ? ? ? ? (0xe6) reserved ? ? ? ? ? ? ? ? (0xe5) reserved ? ? ? ? ? ? ? ? (0xe4) reserved ? ? ? ? ? ? ? ? (0xe3) reserved ? ? ? ? ? ? ? ? (0xe2) reserved ? ? ? ? ? ? ? ? (0xe1) reserved ? ? ? ? ? ? ? ? (0xe0) reserved ? ? ? ? ? ? ? ? (0xdf) reserved ? ? ? ? ? ? ? ? (0xde) reserved ? ? ? ? ? ? ? ? (0xdd) reserved ? ? ? ? ? ? ? ? (0xdc) reserved ? ? ? ? ? ? ? ? (0xdb) reserved ? ? ? ? ? ? ? ? (0xda) reserved ? ? ? ? ? ? ? ? (0xd9) reserved ? ? ? ? ? ? ? ? (0xd8) reserved ? ? ? ? ? ? ? ? (0xd7) reserved ? ? ? ? ? ? ? ? (0xd6) reserved ? ? ? ? ? ? ? ? (0xd5) reserved ? ? ? ? ? ? ? ? (0xd4) reserved ? ? ? ? ? ? ? ? (0xd3) reserved ? ? ? ? ? ? ? ? (0xd2) reserved ? ? ? ? ? ? ? ? (0xd1) reserved ? ? ? ? ? ? ? ? (0xd0) reserved ? ? ? ? ? ? ? ? (0xcf) reserved ? ? ? ? ? ? ? ? (0xce) reserved ? ? ? ? ? ? ? ? (0xcd) reserved ? ? ? ? ? ? ? ? (0xcc) reserved ? ? ? ? ? ? ? ? (0xcb) reserved ? ? ? ? ? ? ? ? (0xca) reserved ? ? ? ? ? ? ? ? (0xc9) reserved ? ? ? ? ? ? ? ? (0xc8) reserved ? ? ? ? ? ? ? ? (0xc7) reserved ? ? ? ? ? ? ? ? (0xc6) udr0 usart i/o data register 194 (0xc5) ubrr0h usart baud rate register high 198 (0xc4) ubrr0l usart baud rate register low 198 (0xc3) reserved ? ? ? ? ? ? ? ? (0xc2) ucsr0c umsel01 umsel00 upm01 upm00 usbs0 ucsz01 /udord0 ucsz00 / ucpha0 ucpol0 196/207 (0xc1) ucsr0b rxcie0 txcie0 udrie0 rxen0 txen0 ucsz02 rxb80 txb80 195 (0xc0) ucsr0a rxc0 txc0 udre0 fe0 dor0 upe0 u2x0 mpcm0 194 (0xbf) reserved ? ? ? ? ? ? ? ? (0xbe) reserved ? ? ? ? ? ? ? ?
9 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 (0xbd) twamr twam6 twam5 twam4 twam3 twam2 twam1 twam0 ?237 (0xbc) twcr twint twea twsta twsto twwc twen ?twie 235 (0xbb) twdr 2-wire serial interface data register 237 (0xba) twar twa6 twa5 twa4 tw a3 twa2 twa1 twa0 twgce 237 (0xb9) twsr tws7 tws6 tws5 tws4 tws3 ?twps1twps0 236 (0xb8) twbr 2-wire serial interface bit rate register 235 (0xb7) reserved ? ? ? ? ? ? ? (0xb6) assr ? exclk as2 tcn2ub ocr2aub ocr2bub tcr2aub tcr2bub 160 (0xb5) reserved ? ? ? ? ? ? ? ? (0xb4) ocr2b timer/counter2 output compare register b 159 (0xb3) ocr2a timer/counter2 output compare register a 159 (0xb2) tcnt2 timer/counter2 (8-bit) 159 (0xb1) tccr2b foc2a foc2b ? ? wgm22 cs22 cs21 cs20 158 (0xb0) tccr2a com2a1 com2a0 com2b1 com2b0 ? ?wgm21wgm20 155 (0xaf) reserved ? ? ? ? ? ? ? ? (0xae) reserved ? ? ? ? ? ? ? ? (0xad) reserved ? ? ? ? ? ? ? ? (0xac) reserved ? ? ? ? ? ? ? ? (0xab) reserved ? ? ? ? ? ? ? ? (0xaa) reserved ? ? ? ? ? ? ? ? (0xa9) reserved ? ? ? ? ? ? ? ? (0xa8) reserved ? ? ? ? ? ? ? ? (0xa7) reserved ? ? ? ? ? ? ? ? (0xa6) reserved ? ? ? ? ? ? ? ? (0xa5) reserved ? ? ? ? ? ? ? ? (0xa4) reserved ? ? ? ? ? ? ? ? (0xa3) reserved ? ? ? ? ? ? ? ? (0xa2) reserved ? ? ? ? ? ? ? ? (0xa1) reserved ? ? ? ? ? ? ? ? (0xa0) reserved ? ? ? ? ? ? ? ? (0x9f) reserved ? ? ? ? ? ? ? ? (0x9e) reserved ? ? ? ? ? ? ? ? (0x9d) reserved ? ? ? ? ? ? ? ? (0x9c) reserved ? ? ? ? ? ? ? ? (0x9b) reserved ? ? ? ? ? ? ? ? (0x9a) reserved ? ? ? ? ? ? ? ? (0x99) reserved ? ? ? ? ? ? ? ? (0x98) reserved ? ? ? ? ? ? ? ? (0x97) reserved ? ? ? ? ? ? ? ? (0x96) reserved ? ? ? ? ? ? ? ? (0x95) reserved ? ? ? ? ? ? ? ? (0x94) reserved ? ? ? ? ? ? ? ? (0x93) reserved ? ? ? ? ? ? ? ? (0x92) reserved ? ? ? ? ? ? ? ? (0x91) reserved ? ? ? ? ? ? ? ? (0x90) reserved ? ? ? ? ? ? ? ? (0x8f) reserved ? ? ? ? ? ? ? ? (0x8e) reserved ? ? ? ? ? ? ? ? (0x8d) reserved ? ? ? ? ? ? ? ? (0x8c) reserved ? ? ? ? ? ? ? ? (0x8b) ocr1bh timer/counter1 - output compare register b high byte 136 (0x8a) ocr1bl timer/counter1 - outp ut compare register b low byte 136 (0x89) ocr1ah timer/counter1 - output compare register a high byte 136 (0x88) ocr1al timer/counter1 - output compare register a low byte 136 (0x87) icr1h timer/counter1 - input capture register high byte 136 (0x86) icr1l timer/counter1 - input capture register low byte 136 (0x85) tcnt1h timer/counter1 - counter register high byte 135 (0x84) tcnt1l timer/counter1 - counter register low byte 135 (0x83) reserved ? ? ? ? ? ? ? ? (0x82) tccr1c foc1a foc1b ? ? ? ? ? ?135 (0x81) tccr1b icnc1 ices1 ? wgm13 wgm12 cs12 cs11 cs10 134 (0x80) tccr1a com1a1 com1a0 com1b1 com1b0 ? ?wgm11wgm10 132 (0x7f) didr1 ? ? ? ? ? ?ain1dain0d 241 (0x7e) didr0 ? ? adc5d adc4d adc3d adc2d adc1d adc0d 257 (0x7d) reserved ? ? ? ? ? ? ? ? (0x7c) admux refs1 refs0 adlar ? mux3 mux2 mux1 mux0 254 (0x7b) adcsrb ?acme ? ? ? adts2 adts1 adts0 257 (0x7a) adcsra aden adsc adate adif adie adps2 adps1 adps0 255 address name bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 page
10 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 (0x79) adch adc data register high byte 256 (0x78) adcl adc data register low byte 256 (0x77) reserved ? ? ? ? ? ? ? ? (0x76) reserved ? ? ? ? ? ? ? ? (0x75) reserved ? ? ? ? ? ? ? ? (0x74) reserved ? ? ? ? ? ? ? ? (0x73) reserved ? ? ? ? ? ? ? ? (0x72) reserved ? ? ? ? ? ? ? ? (0x71) reserved ? ? ? ? ? ? ? ? (0x70) timsk2 ? ? ? ? ? ocie2b ocie2a toie2 159 (0x6f) timsk1 ? ?icie1 ? ? ocie1b ocie1a toie1 136 (0x6e) timsk0 ? ? ? ? ? ocie0b ocie0a toie0 110 (0x6d) pcmsk2 pcint23 pcint22 pcint21 pcint20 pcint19 pcint18 pcint17 pcint16 75 (0x6c) pcmsk1 ? pcint14 pcint13 pcint12 pcint11 pcint10 pcint9 pcint8 75 (0x6b) pcmsk0 pcint7 pcint6 pcint5 pc int4 pcint3 pcint2 pcint1 pcint0 75 (0x6a) reserved ? ? ? ? ? ? ? ? (0x69) eicra ? ? ? ?isc11isc10isc01isc00 72 (0x68) pcicr ? ? ? ? ? pcie2 pcie1 pcie0 (0x67) reserved ? ? ? ? ? ? ? ? (0x66) osccal oscillator calibration register 36 (0x65) reserved ? ? ? ? ? ? ? ? (0x64) prr prtwi prtim2 prtim0 ? prtim1 prspi prusart0 pradc 41 (0x63) reserved ? ? ? ? ? ? ? ? (0x62) reserved ? ? ? ? ? ? ? ? (0x61) clkpr clkpce ? ? ? clkps3 clkps2 clkps1 clkps0 36 (0x60) wdtcsr wdif wdie wdp3 wdce wde wdp2 wdp1 wdp0 54 0x3f (0x5f) sreg i t h s v n z c 9 0x3e (0x5e) sph ? ? ? ? ? (sp10) 5. sp9 sp8 12 0x3d (0x5d) spl sp7 sp6 sp5 sp4 sp3 sp2 sp1 sp0 12 0x3c (0x5c) reserved ? ? ? ? ? ? ? ? 0x3b (0x5b) reserved ? ? ? ? ? ? ? ? 0x3a (0x5a) reserved ? ? ? ? ? ? ? ? 0x39 (0x59) reserved ? ? ? ? ? ? ? ? 0x38 (0x58) reserved ? ? ? ? ? ? ? ? 0x37 (0x57) spmcsr spmie (rwwsb) 5. sigrd (rwwsre) 5. blbset pgwrt pgers spmen 283 0x36 (0x56) reserved ? ? ? ? ? ? ? ? 0x35 (0x55) mcucr ?bods (6) bodse (6) pud ? ? ivsel ivce 44/69/92 0x34 (0x54) mcusr ? ? ? ? wdrf borf extrf porf 54 0x33 (0x53) smcr ? ? ? ?sm2sm1sm0se 39 0x32 (0x52) reserved ? ? ? ? ? ? ? ? 0x31 (0x51) reserved ? ? ? ? ? ? ? ? 0x30 (0x50) acsr acd acbg aco aci acie acic acis1 acis0 240 0x2f (0x4f) reserved ? ? ? ? ? ? ? ? 0x2e (0x4e) spdr spi data register 171 0x2d (0x4d) spsr spif wcol ? ? ? ? ? spi2x 170 0x2c (0x4c) spcr spie spe dord mstr cpol cpha spr1 spr0 169 0x2b (0x4b) gpior2 general purpose i/o register 2 25 0x2a (0x4a) gpior1 general purpose i/o register 1 25 0x29 (0x49) reserved ? ? ? ? ? ? ? ? 0x28 (0x48) ocr0b timer/counter0 output compare register b 0x27 (0x47) ocr0a timer/counter0 output compare register a 0x26 (0x46) tcnt0 timer/counter0 (8-bit) 0x25 (0x45) tccr0b foc0a foc0b ? ? wgm02 cs02 cs01 cs00 0x24 (0x44) tccr0a com0a1 com0a0 com0b1 com0b0 ? ?wgm01wgm00 0x23 (0x43) gtccr tsm ? ? ? ? ? psrasy psrsync 141/161 0x22 (0x42) eearh (eeprom address register high byte) 5. 21 0x21 (0x41) eearl eeprom address register low byte 21 0x20 (0x40) eedr eeprom data register 21 0x1f (0x3f) eecr ? ? eepm1 eepm0 eerie eempe eepe eere 21 0x1e (0x3e) gpior0 general purpose i/o register 0 25 0x1d (0x3d) eimsk ? ? ? ? ? ?int1int0 73 0x1c (0x3c) eifr ? ? ? ? ? ? intf1 intf0 73 0x1b (0x3b) pcifr ? ? ? ? ? pcif2 pcif1 pcif0 0x1a (0x3a) reserved ? ? ? ? ? ? ? ? 0x19 (0x39) reserved ? ? ? ? ? ? ? ? 0x18 (0x38) reserved ? ? ? ? ? ? ? ? 0x17 (0x37) tifr2 ? ? ? ? ? ocf2b ocf2a tov2 160 0x16 (0x36) tifr1 ? ?icf1 ? ? ocf1b ocf1a tov1 137 address name bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 page
11 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 note: 1. for compatibility with future devices, reserved bits s hould be written to zero if accessed. reserved i/o memory addresse s should never be written. 2. i/o registers within the address range 0x00 - 0x1f are directly bit-accessible using the sbi and cbi instructions. in these registers, the value of single bits can be ch ecked by using the sbis and sbic instructions. 3. some of the status flags are cleared by writing a logical o ne to them. note that, unlike most other avrs, the cbi and sbi instructions will only operate on the specif ied bit, and can therefore be used on regi sters containing such status flags. the cbi and sbi instructions work wit h registers 0x00 to 0x1f only. 4. when using the i/o specific commands in and out, the i/o addresses 0x00 - 0x3f must be used. when addressing i/o registers as data space using ld and st instruct ions, 0x20 must be added to these addresses. the atmega48a/pa/88a/pa/168a/pa/328/p is a complex microcontroller with more peripheral units than can be supported within the 64 location reserved in opcode for the in and ou t instructions. for the extended i/o space from 0x60 - 0xff in sram, only the st/sts/std and ld/lds/ldd instructions can be used. 5. only valid for atmega88a/88pa/168a/168pa/328/328p. 6. bods and bodse only available for picopower devices atmega48pa/88pa/168pa/328p 0x15 (0x35) tifr0 ? ? ? ? ? ocf0b ocf0a tov0 0x14 (0x34) reserved ? ? ? ? ? ? ? ? 0x13 (0x33) reserved ? ? ? ? ? ? ? ? 0x12 (0x32) reserved ? ? ? ? ? ? ? ? 0x11 (0x31) reserved ? ? ? ? ? ? ? ? 0x10 (0x30) reserved ? ? ? ? ? ? ? ? 0x0f (0x2f) reserved ? ? ? ? ? ? ? ? 0x0e (0x2e) reserved ? ? ? ? ? ? ? ? 0x0d (0x2d) reserved ? ? ? ? ? ? ? ? 0x0c (0x2c) reserved ? ? ? ? ? ? ? ? 0x0b (0x2b) portd portd7 portd6 portd 5 portd4 portd3 portd2 portd1 portd0 93 0x0a (0x2a) ddrd ddd7 ddd6 ddd5 ddd4 ddd3 ddd2 ddd1 ddd0 93 0x09 (0x29) pind pind7 pind6 pi nd5 pind4 pind3 pind2 pind1 pind0 93 0x08 (0x28) portc ? portc6 portc5 portc4 portc3 portc2 portc1 portc0 92 0x07 (0x27) ddrc ? ddc6 ddc5 ddc4 ddc3 ddc2 ddc1 ddc0 92 0x06 (0x26) pinc ? pinc6 pinc5 pinc4 pinc3 pinc2 pinc1 pinc0 92 0x05 (0x25) portb portb7 portb6 portb 5 portb4 portb3 portb2 portb1 portb0 92 0x04 (0x24) ddrb ddb7 ddb6 ddb 5 ddb4 ddb3 ddb2 ddb1 ddb0 92 0x03 (0x23) pinb pinb7 pinb6 pinb5 pinb4 pinb3 pinb2 pinb1 pinb0 92 0x02 (0x22) reserved ? ? ? ? ? ? ? ? 0x01 (0x21) reserved ? ? ? ? ? ? ? ? 0x0 (0x20) reserved ? ? ? ? ? ? ? ? address name bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 page
12 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8. ordering information 8.1 atmega48a note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substa nces (rohs directive).also halide free and fully green. 3. see ?speed grades? on page 308 . 4. nipdau lead finish. 5. tape & reel. speed (mhz) power supply (v) ordering code (2) package (1) operational range 20 (3) 1.8 - 5.5 atmega48a-au atmega48a-aur (5) atmega48a-ccu atmega48a-ccur (5) atmega48a-mmh (4) atmega48a-mmhr (4)(5) atmega48a-mu atmega48a-mur (5) atmega48a-pu 32a 32a 32cc1 32cc1 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) package type 32a 32-lead, thin (1.0 mm) plastic quad flat package (tqfp) 32cc1 32-ball, 4 x 4 x 0.6 mm package, ball pitch 0.5 mm , ultra thin, fine-pitch ball grill array (ufbga) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45 mm quad flat no-lead/micro lead frame package (qfn/mlf) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50 mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip)
13 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8.2 atmega48pa note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substances (rohs directive). also halide free and fully green. 3. see ?speed grades? on page 308 . 4. nipdau lead finish. 5. tape & reel. speed (mhz) (3) power supply ordering code (2) package (1) operational range 20 1.8 - 5.5 atmega48pa-au atmega48pa-aur (5) atmega48pa-ccu atmega48pa-ccur (5) atmega48pa-mmh (4) atmega48pa-mmhr (4)(5) atmega48pa-mu atmega48pa-mur (5) atmega48pa-pu 32a 32a 32cc1 32cc1 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) atmega48pa-an atmega48pa-anr (5) atmega48pa-mmn (4) atmega48pa-mmnr (4)(5) atmega48pa-mn atmega48pa-mnr (5) atmega48pa-pn 32a 32a 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 105 ? c) package type 32a 32-lead, thin (1.0mm) plastic quad flat package (tqfp) 32cc1 32-ball, 4 x 4 x 0.6mm package, ball pitch 0.5mm, ultra thin, fine-pitch ball grill array (ufbga) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45mm quad flat no-lead/micro lead frame package (qfn/mlf) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip)
14 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8.3 atmega88a note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substa nces (rohs directive).also halide free and fully green. 3. see ?speed grades? on page 308 . 4. nipdau lead finish. 5. tape & reel. speed (mhz) power supply (v) ordering code (2) package (1) operational range 20 (3) 1.8 - 5.5 atmega88a-au atmega88a-aur (5) atmega88a-ccu atmega88a-ccur (5) atmega88a-mmh (4) atmega88a-mmhr (4)(5) atmega88a-mu atmega88a-mur (5) atmega88a-pu 32a 32a 32cc1 32cc1 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) package type 32a 32-lead, thin (1.0mm) plastic quad flat package (tqfp) 32cc1 32-ball, 4 x 4 x 0.6mm package, ball pitch 0.5mm, ultra thin, fine-pitch ball grill array (ufbga) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45mm quad flat no-lead/micro lead frame package (qfn/mlf) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip)
15 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8.4 atmega88pa note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substa nces (rohs directive).also halide free and fully green. 3. see ?speed grades? on page 308 . 4. nipdau lead finish. 5. tape & reel. speed (mhz) (3) power supply (v) ordering code (2) package (1) operational range 20 1.8 - 5.5 atmega88pa-au atmega88pa-aur (5) atmega88pa-ccu atmega88pa-ccur (5) atmega88pa-mmh (4) atmega88pa-mmhr (4)(5) atmega88pa-mu atmega88pa-mur (5) atmega88pa-pu 32a 32a 32cc1 32cc1 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) atmega88pa-an atmega88pa-anr (5) atmega88pa-mmn (4) atmega88pa-mmnr (4)(5) atmega88pa-mn atmega88pa-mnr (5) atmega88pa-pn 32a 32a 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 105 ? c) package type 32a 32-lead, thin (1.0mm) plastic quad flat package (tqfp) 32cc1 32-ball, 4 x 4 x 0.6mm package, ball pitch 0.5 mm, ultra thin, fine-pitch ball grill array (ufbga) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45 mm quad flat no-lead/micro lead frame package (qfn/mlf) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50 mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip)
16 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8.5 atmega168a note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substa nces (rohs directive).also halide free and fully green. 3. see ?speed grades? on page 308 4. nipdau lead finish. 5. tape & reel. speed (mhz) (3) power supply (v) ordering code (2) package (1) operational range 20 1.8 - 5.5 atmega168a-au atmega168a-aur (5) atmega168a-ccu atmega168a-ccur (5) atmega168a-mmh (4) atmega168a-mmhr (4)(5) atmega168a-mu atmega168a-mur (5) atmega168a-pu 32a 32a 32cc1 32cc1 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) package type 32a 32-lead, thin (1.0mm) plastic quad flat package (tqfp) 32cc1 32-ball, 4 x 4 x 0.6 mm package, ball pitch 0.5mm, ultra thin, fine-pitch ball grill array (ufbga) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45mm quad flat no-lead/micro lead frame package (qfn/mlf) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip)
17 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8.6 atmega168pa note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substa nces (rohs directive).also halide free and fully green. 3. see ?speed grades? on page 308 . 4. nipdau lead finish. 5. tape & reel. speed (mhz) (3) power supply (v) ordering code (2) package (1) operational range 20 1.8 - 5.5 atmega168pa-au atmega168pa-aur (5) atmega168pa-ccu atmega168pa-ccur (5) atmega168pa-mmh (4) atmega168pa-mmhr (4)(5) atmega168pa-mu atmega168pa-mur (5) atmega168pa-pu 32a 32a 32cc1 32cc1 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) 20 1.8 - 5.5 atmega168pa-an atmega168pa-anr (5) atmega168pa-mn atmega168pa-mnr (5) atmega168pa-pn 32a 32a 32m1-a 32m1-a 28p3 industrial (-40 ? c to 105 ? c) package type 32a 32-lead, thin (1.0mm) plastic quad flat package (tqfp) 32cc1 32-ball, 4 x 4 x 0.6mm package, ball pitch 0.5mm, ultra thin, fine-pitch ball grill array (ufbga) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45mm quad flat no-lead/micro lead frame package (qfn/mlf) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip)
18 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8.7 atmega328 note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substa nces (rohs directive).also halide free and fully green. 3. see figure 29-1 on page 308 . 4. nipdau lead finish. 5. tape & reel speed (mhz) power supply (v) ordering code (2) package (1) operational range 20 (3) 1.8 - 5.5 atmega328-au atmega328-aur (5) atmega328-mmh (4) atmega328-mmhr (4)(5) atmega328-mu atmega328-mur (5) atmega328-pu 32a 32a 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) package type 32a 32-lead, thin (1.0mm) plastic quad flat package (tqfp) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50mm quad flat no-lead/micro lead frame package (qfn/mlf)
19 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 8.8 atmega328p note: 1. this device can also be supplied in wafer form. please contact your local atmel sales office for detailed ordering infor mation and minimum quantities. 2. pb-free packaging complies to the european directive for re striction of hazardous substa nces (rohs directive).also halide free and fully green. 3. see figure 29-1 on page 308 . 4. nipdau lead finish. 5. tape & reel. speed (mhz) (3) power supply (v) ordering code (2) package (1) operational range 20 1.8 - 5.5 atmega328p-au atmega328p-aur (5) atmega328p-mmh (4) atmega328p-mmhr (4)(5) atmega328p-mu atmega328p-mur (5) atmega328p-pu 32a 32a 28m1 28m1 32m1-a 32m1-a 28p3 industrial (-40 ? c to 85 ? c) atmega328p-an atmega328p-anr (5) atmega328p-mn atmega328p-mnr (5) atmega328p-pn 32a 32a 32m1-a 32m1-a 28p3 industrial (-40 ? c to 105 ? c) package type 32a 32-lead, thin (1.0mm) plastic quad flat package (tqfp) 28m1 28-pad, 4 x 4 x 1.0 body, lead pitch 0.45mm quad flat no-lead/micro lead frame package (qfn/mlf) 28p3 28-lead, 0.300? wide, plastic dual inline package (pdip) 32m1-a 32-pad, 5 x 5 x 1.0 body, lead pitch 0.50mm quad flat no-lead/micro lead frame package (qfn/mlf)
20 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 9. packaging information 9.1 32a title drawing no. rev. 32a, 32-lead, 7 x 7mm body size, 1.0mm body thickness, 0.8mm lead pitch, thin profile plastic quad flat package (tqfp) c 32a 2010-10-20 pin 1 identifier 0~7 pin 1 l c a1 a2 a d1 d e e1 e b notes: 1. this package conforms to jedec reference ms-026, variation aba. 2. dimensions d1 and e1 do not include mold protrusion. allowable protrusion is 0.25mm per side. dimensions d1 and e1 are maximum plastic body size dimensions including mold mismatch. 3. lead coplanarity is 0.10mm maximum. a C C 1.20 a1 0.05 C 0.15 a2 0.95 1.00 1.05 d 8.75 9.00 9.25 d1 6.90 7.00 7.10 note 2 e 8.75 9.00 9.25 e1 6.90 7.00 7.10 note 2 b 0.30 C 0.45 c 0.09 C 0.20 l 0.45 C 0.75 e 0.80 typ common dimensions (unit of measure = mm) symbol min nom max note
21 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 9.2 32cc1 title drawing no. gpc rev. packa g e drawin g contact: packagedra w ings@atmel.com b cag 3 2cc1 , 32- b all (6 x 6 array), 4 x 4 x 0.6 mm package, b all pitch 0.50 mm, ultra thin, fine-pitch ball grid array (ufbga) 32cc1 a ? ? 0.60 a1 0.12 ? ? a2 0.3 8 ref b 0.25 0.30 0.35 1 b 1 0.25 ? ? 2 d 3.90 4.00 4.10 d1 2.50 bsc e 3.90 4.00 4.10 e1 2.50 bsc e 0.50 bsc 07/06/10 b 1 common dimen s ion s (unit of meas u re = mm) 123456 b a c d e f e d e 32-? b e d b a pin#1 id 0.0 8 a1 a d1 e1 a2 a1 ball cor n er 123456 f c s ide view bottom view top view s ymbol min nom max note n ote1: dimension ?b? is measured at the maximum ball dia. in a plane parallel to the seating plane. n ote2: dimension ? b 1? is the soldera b le s u rface defined b y the opening of the solder resist layer. e
22 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 9.3 28m1 title drawing no. gpc rev. packa g e drawin g contact: packagedrawings@atmel.com 28m1 zbv b 2 8 m1, 28-pad, 4 x 4 x 1.0mm body, lead pitch 0.45mm, 2.4 x 2.4mm exposed pad, thermally enhanced plastic very thin quad flat no lead package (vqfn) 10/24/08 s ide view pin 1 id bottom view top view note: the terminal #1 id is a laser-marked feature . d e e k a1 c a d2 e2 y l 1 2 3 b 1 2 3 0.45 common dimen s ion s (unit of measure = mm) s ymbol min nom max note a 0.80 0.90 1.00 a1 0.00 0.02 0.05 b 0.17 0.22 0.27 c 0.20 ref d 3.95 4.00 4.05 d2 2.35 2.40 2.45 e 3.95 4.00 4.05 e2 2.35 2.40 2.45 e 0.45 l 0.35 0.40 0.45 y 0.00 ? 0.08 k 0.20 ? ? r 0.20 0.4 ref (4x)
23 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 9.4 32m1-a 2325 orchard parkway san jose, ca 95131 title drawing no. r rev. 3 2m1-a , 32-pad, 5 x 5 x 1.0mm body, lead pitch 0.50mm, e 32m1-a 5/25/06 3.10mm exposed pad, micro lead frame package (mlf) common dimen s ion s (unit of measure = mm) s ymbol min nom max note d1 d e1 e e b a3 a2 a1 a d2 e2 0.08 c l 1 2 3 p p 0 1 2 3 a 0.80 0.90 1.00 a1 ? 0.02 0.05 a2 ? 0.65 1.00 a3 0.20 ref b 0.18 0.23 0.30 d d1 d2 2.95 3.10 3.25 4.90 5.00 5.10 4.70 4.75 4.80 4.70 4.75 4.80 4.90 5.00 5.10 e e1 e2 2.95 3.10 3.25 e 0.50 bsc l 0.30 0.40 0.50 p ? ? 0.60 ? ? 12 o note: jedec standard mo-220, fig. 2 (anvil singulation), vhhd-2. top view s ide view bottom view 0 pin 1 id pin #1 notch (0.20 r) k 0.20 ? ? k k
24 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 9.5 28p3 2325 orchard parkway san jose, ca 95131 title drawing no. r rev. 2 8 p 3 , 28-lead (0.300"/7.62mm wide) plastic dual inline package (pdip) b 28p3 09/28/01 pin 1 e1 a1 b ref e b1 c l seating plane a 0o ~ 15o d e eb b2 (4 places) common dimen s ion s (unit of measure = mm) s ymbol min nom max note a ? ? 4.5724 a1 0.508 ? ? d 34.544 ? 34.798 note 1 e 7.620 ? 8.255 e1 7.112 ? 7.493 note 1 b 0.381 ? 0.533 b1 1.143 ? 1.397 b2 0.762 ? 1.143 l 3.175 ? 3.429 c 0.203 ? 0.356 eb ? ? 10.160 e 2.540 typ note: 1. dimensions d and e1 do not include mold flash or protrusion. mold flash or protrusion shall not exceed 0.25mm (0.010").
25 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 10. errata 10.1 errata atmega48a the revision letter in this section refers to the revision of the atmega48a device. 10.1.1 rev. d ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr. 10.2 errata atmega48pa the revision letter in this section refers to the revision of the atmega48pa device. 10.2.1 rev. d ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr.
26 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 10.3 errata atmega88a the revision letter in this section refers to the revision of the atmega88a device. 10.3.1 rev. f ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr. 10.4 errata atmega88pa the revision letter in this section refers to the revision of the atmega88pa device. 10.4.1 rev. f ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr.
27 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 10.5 errata atmega168a the revision letter in this section refers to the revision of the atmega168a device. 10.5.1 rev. e ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr. 10.6 errata atmega168pa the revision letter in this section refers to the revision of the atmega168pa device. 10.6.1 rev e ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr.
28 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 10.7 errata atmega328 the revision letter in this section refers to the revision of the atmega328 device. 10.7.1 rev d ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr. 10.7.2 rev c not sampled. 10.7.3 rev b ? analog mux can be turned off when setting acme bit ? unstable 32khz oscillator 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. unstable 32khz oscillator the 32khz oscillator does not work as system clock. the 32khz oscilla tor used as asynchronous timer is inaccurate. problem fix/ workaround none. 10.7.4 rev a ? analog mux can be turned off when setting acme bit ? unstable 32khz oscillator 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit.
29 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 2. unstable 32khz oscillator the 32khz oscillator does not work as system clock. the 32khz oscilla tor used as asynchronous timer is inaccurate. problem fix/ workaround none. 10.8 errata atmega328p the revision letter in this section refers to the revision of the atmega328p device. 10.8.1 rev d ? analog mux can be turned off when setting acme bit ? twi data setup time can be too short 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. twi data setup time can be too short when running the device as a twi slave with a system clock above 2mhz, the data se tup time for the first bit after ack may in some cases be too short. this may cause a false start or stop condition on the twi line. problem fix/workaround insert a delay between setting twdr and twcr. 10.8.2 rev c not sampled. 10.8.3 rev b ? analog mux can be turned off when setting acme bit ? unstable 32khz oscillator 1. analog mux can be turned off when setting acme bit if the acme (analog comparator multiplexer enabled) bi t in adcsrb is set while mux3 in admux is '1' (admux[3:0]=1xxx), all mux'es are turned off until the acme bit is cleared. problem fix/workaround clear the mux3 bit before setting the acme bit. 2. unstable 32khz oscillator the 32khz oscillator does not work as system clock. the 32khz oscilla tor used as asynchronous timer is inaccurate. problem fix/ workaround none.
30 atmega48a/pa/88a/ pa/168a/pa/328/p [datasheet summary] 8271gs?avr?02/2013 10.8.4 rev a ? unstable 32khz oscillator 1. unstable 32khz oscillator the 32khz oscillator does not work as system clock. the 32khz oscilla tor used as asynchronous timer is inaccurate. problem fix/ workaround none.
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