ATmega165P Atmel Corporation, ATmega165P Datasheet - Page 24

• Manufacturer Part Number: ATmega165P
• Manufacturer: Atmel Corporation

Specifications of ATmega165P

• 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
• 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

6.5
6.6
6.6.1
6.6.2
6.6.3
8019K–AVR–11/10
General Purpose I/O Registers
Register Description
EEARH and EEARL – EEPROM Address Register
EEDR – EEPROM Data Register
EECR – EEPROM Control Register
The ATmega165P 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.
• Bits 7..0 – EEDR7..0: EEPROM Data
For the EEPROM write operation, the EEDR Register contains the data to be written to the
EEPROM in the address given by the EEAR Register. For the EEPROM read operation, the
EEDR contains the data read out from the EEPROM at the address given by EEAR.
• Bits 7..4 – Res: Reserved Bits
These bits are reserved and will always read as zero.
Bit
0x22 (0x42)
0x21 (0x41)
Read/Write
Initial Value
Bit
0x20 (0x40)
Read/Write
Initial Value
Bit
0x1F (0x3F)
Read/Write
Initial Value
EEAR7
MSB
R/W
R/W
15
R
R
X
7
–
0
–
7
0
7
0
EEAR6
R/W
R/W
14
R
R
X
6
–
0
–
6
0
6
0
EEAR5
R/W
R/W
13
R
R
X
5
–
0
–
5
0
5
0
EEAR4
R/W
R/W
12
R
R
X
4
–
0
–
4
0
4
0
EEAR3
EERIE
R/W
R/W
R/W
11
3
0
R
X
–
3
0
3
0
EEMWE
EEAR2
R/W
R/W
R/W
10
R
X
2
0
–
2
0
2
0
EEAR1
EEWE
ATmega165P
R/W
R/W
R/W
R
X
9
–
1
0
1
0
1
X
EEAR8
EEAR0
EERE
LSB
R/W
R/W
R/W
R/W
X
X
8
0
0
0
0
0
EEARH
EEARL
EEDR
EECR
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