ATmega128A Atmel Corporation, ATmega128A Datasheet - Page 382

• Manufacturer Part Number: ATmega128A
• Manufacturer: Atmel Corporation

Specifications of ATmega128A

• Flash (kbytes): 128 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: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• 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): 4
• 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: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

iv
ATmega128A
18 Output Compare Modulator (OCM1C2) .............................................. 163
19 Serial Peripheral Interface – SPI ......................................................... 165
20 USART ................................................................................................... 174
21 Two-wire Serial Interface ..................................................................... 201
22 Analog Comparator ............................................................................. 230
17.9
18.1
18.2
19.1
19.2
19.3
19.4
19.5
20.1
20.2
20.3
20.4
20.5
20.6
20.7
20.8
20.9
20.10
21.1
21.2
21.3
21.4
21.5
21.6
21.7
21.8
21.9
22.1
22.2
Register Description ......................................................................................159
Overview ........................................................................................................163
Description .....................................................................................................163
Features ........................................................................................................165
Overview ........................................................................................................165
SS Pin Functionality ......................................................................................170
Data Modes ...................................................................................................170
Register Description ......................................................................................171
Features ........................................................................................................174
Overview ........................................................................................................174
Clock Generation ...........................................................................................176
Frame Formats ..............................................................................................179
USART Initialization .......................................................................................180
Data Transmission – The USART Transmitter ..............................................181
Data Reception – The USART Receiver .......................................................184
Multi-processor Communication Mode ..........................................................191
Register Description ......................................................................................192
Examples of Baud Rate Setting .....................................................................198
Features ........................................................................................................201
Two-wire Serial Interface Bus Definition ........................................................201
Data Transfer and Frame Format ..................................................................202
Multi-master Bus Systems, Arbitration and Synchronization .........................205
Overview of the TWI Module .........................................................................206
Using the TWI ................................................................................................209
Transmission Modes .....................................................................................212
Multi-master Systems and Arbitration ............................................................225
Register Description ......................................................................................226
Overview ........................................................................................................230
Analog Comparator Multiplexed Input ...........................................................230
8151H–AVR–02/11