ATmega645P Atmel Corporation, ATmega645P Datasheet - Page 677
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ATmega645P
Manufacturer Part Number
ATmega645P
Description
Manufacturer
Atmel Corporation
Specifications of ATmega645P
Flash (kbytes)
64 Kbytes
Pin Count
64
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
54
Ext Interrupts
17
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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8285D–AVR–06/11
ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P
27 Memory Programming ......................................................................... 283
28 Electrical Characteristics .................................................................... 317
29 Typical Characteristics ........................................................................ 332
26.4Read-While-Write and No Read-While-Write Flash Sections ..............................267
26.5Boot Loader Lock Bits .........................................................................................270
26.6Entering the Boot Loader Program ......................................................................271
26.7Addressing the Flash During Self-Programming .................................................272
26.8Self-Programming the Flash ................................................................................273
26.9Register Description ............................................................................................281
27.1Program And Data Memory Lock Bits .................................................................283
27.2Fuse Bits .............................................................................................................284
27.3Signature Bytes ...................................................................................................286
27.4Calibration Byte ...................................................................................................286
27.5Page Size ............................................................................................................286
27.6Parallel Programming Parameters, Pin Mapping, and Commands .....................287
27.7Parallel Programming ..........................................................................................289
27.8Serial Downloading .............................................................................................298
27.9Programming via the JTAG Interface ..................................................................304
28.1Absolute Maximum Ratings* ...............................................................................317
28.2DC Characteristics ..............................................................................................317
28.3Speed Grades .....................................................................................................324
28.4Clock Characteristics ...........................................................................................325
28.5System and Reset Characteristics ......................................................................326
28.6Power-on Reset ...................................................................................................326
28.7Brown-out Detection ............................................................................................327
28.8External Interrupts Characteristics ......................................................................327
28.9SPI Timing Characteristics ..................................................................................328
28.10ADC Characteristics .........................................................................................330
29.1ATmega165A ......................................................................................................332
29.2ATmega165PA ....................................................................................................365
29.3ATmega325A ......................................................................................................397
29.4ATmega325PA ....................................................................................................428
29.5ATmega3250A ....................................................................................................459
29.6ATmega3250PA ..................................................................................................490
29.7ATmega645A ......................................................................................................521
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