ATmega169P Atmel Corporation, ATmega169P Datasheet - Page 28

• Manufacturer Part Number: ATmega169P
• Manufacturer: Atmel Corporation

Specifications of ATmega169P

• Flash (kbytes): 16 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
• Segment Lcd: 100
• 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): 1
• Eeprom (bytes): 512
• 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

7.5
7.5.1
7.5.2
7.5.3
7.6
7.6.1
8018P–AVR–08/10
General Purpose I/O Registers
EEPROM Register Description
GPIOR2 – General Purpose I/O Register 2
GPIOR1 – General Purpose I/O Register 1
GPIOR0 – General Purpose I/O Register 0
EEARH and EEARL – EEPROM Address Register
The ATmega169P contains three General Purpose I/O Registers. These registers can be used
for storing any information, and they are particularly useful for storing global variables and Sta-
tus Flags. General Purpose I/O Registers within the address range 0x00 - 0x1F are directly bit-
accessible using the SBI, CBI, SBIS, and SBIC instructions.
• Bits 15:9 – Res: Reserved Bits
These bits are reserved and will always read as zero.
• Bits 8:0 – EEAR8:0: EEPROM Address
The EEPROM Address Registers – EEARH and EEARL specify the EEPROM address in the
512 bytes EEPROM space. The EEPROM data bytes are addressed linearly between 0 and
511. The initial value of EEAR is undefined. A proper value must be written before the EEPROM
may be accessed.
Bit
0x2B (0x4B)
Read/Write
Initial Value
Bit
0x2A (0x4A)
Read/Write
Initial Value
Bit
0x1E (0x3E)
Read/Write
Initial Value
Bit
0x22 (0x42)
0x21 (0x41)
Read/Write
Initial Value
EEAR7
MSB
MSB
MSB
R/W
R/W
R/W
R/W
15
R
X
7
0
7
0
7
0
–
7
0
EEAR6
R/W
R/W
R/W
R/W
14
R
X
6
0
6
0
6
0
–
6
0
EEAR5
R/W
R/W
R/W
R/W
13
R
X
5
0
5
0
5
0
–
5
0
EEAR4
R/W
R/W
R/W
R/W
12
R
X
4
0
4
0
4
0
–
4
0
EEAR3
R/W
R/W
R/W
R/W
11
R
X
3
0
3
0
3
0
–
3
0
EEAR2
R/W
R/W
R/W
R/W
10
R
X
2
0
2
0
2
0
–
2
0
EEAR1
ATmega169P
R/W
R/W
R/W
R/W
R
X
9
–
1
0
1
0
1
0
1
0
EEAR8
EEAR0
LSB
LSB
LSB
R/W
R/W
R/W
R/W
R/W
X
X
8
0
0
0
0
0
0
0
GPIOR2
GPIOR1
GPIOR0
EEARH
EEARL
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