ATmega1284 Atmel Corporation, ATmega1284 Datasheet - Page 580
ATmega1284
Manufacturer Part Number
ATmega1284
Description
Manufacturer
Atmel Corporation
Specifications of ATmega1284
Flash (kbytes)
128 Kbytes
Pin Count
44
Max. Operating Frequency
20 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
32
Ext Interrupts
32
Usb Speed
No
Usb Interface
No
Spi
3
Twi (i2c)
1
Uart
2
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)
16
Eeprom (bytes)
4096
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
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
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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8272C–AVR–06/11
22 AC - Analog Comparator ..................................................................... 240
23 ADC - Analog-to-digital Converter ..................................................... 243
24 JTAG Interface and On-chip Debug System ..................................... 263
25 IEEE 1149.1 (JTAG) Boundary-scan ................................................... 269
21.1Features ..............................................................................................................210
21.2Two-wire Serial Interface Bus Definition ..............................................................210
21.3Data Transfer and Frame Format ........................................................................211
21.4Multi-master Bus Systems, Arbitration and Synchronization ...............................214
21.5Overview of the TWI Module ...............................................................................216
21.6Using the TWI ......................................................................................................218
21.7Transmission Modes ...........................................................................................221
21.8Multi-master Systems and Arbitration ..................................................................234
21.9Register Description ............................................................................................235
22.1Overview .............................................................................................................240
22.2Analog Comparator Multiplexed Input .................................................................240
22.3Register Description ............................................................................................241
23.1Features ..............................................................................................................243
23.2Overview .............................................................................................................243
23.3Operation .............................................................................................................244
23.4Starting a Conversion ..........................................................................................245
23.5Prescaling and Conversion Timing ......................................................................246
23.6Changing Channel or Reference Selection .........................................................249
23.7ADC Noise Canceler ...........................................................................................251
23.8ADC Conversion Result ......................................................................................256
23.9Register Description ............................................................................................258
24.1Features ..............................................................................................................263
24.2Overview .............................................................................................................263
24.3TAP – Test Access Port ......................................................................................263
24.4TAP Controller .....................................................................................................265
24.5Using the Boundary-scan Chain ..........................................................................266
24.6Using the On-chip Debug System .......................................................................266
24.7On-chip Debug Specific JTAG Instructions .........................................................267
24.8Using the JTAG Programming Capabilities .........................................................267
24.9Bibliography .........................................................................................................268
24.10Register Description ..........................................................................................268
ATmega164A/PA/324A/PA/644A/PA/1284/P
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