ATMEGA3250PV-10AUR Atmel, ATMEGA3250PV-10AUR Datasheet - Page 23

• Manufacturer Part Number: ATMEGA3250PV-10AUR
• Description: MCU AVR 32K FLASH 10MHZ 100TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA3250PV-10AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 69
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.6
7.6.1
7.6.2
8023F–AVR–07/09
Register Description
EEARH and EEARL – The EEPROM Address Register
EEDR – The EEPROM Data Register
reserved in Opcode for the IN and OUT instructions. For the Extended I/O space from 0x60 -
0xFF in SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
For compatibility with future devices, reserved bits should be written to zero if accessed.
Reserved I/O memory addresses should never be written.
Some of the Status Flags are cleared by writing a logical one to them. Note that, unlike most
other AVRs, the CBI and SBI instructions will only operate on the specified bit, and can therefore
be used on registers containing such Status Flags. The CBI and SBI instructions work with reg-
isters 0x00 to 0x1F only.
The I/O and peripherals control registers are explained in later sections.
• Bits 15:11 – Res: Reserved Bits
These bits are reserved and will always read as zero.
• Bits 10:0 – EEAR10:0: EEPROM Address
The EEPROM Address Registers – EEARH and EEARL specify the EEPROM address in the 1K
bytes EEPROM space. The EEPROM data bytes are addressed linearly between 0 and 1023.
The initial value of EEAR is undefined. A proper value must be written before the EEPROM may
be accessed.
Note:
• 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.
Bit
0x22 (0x42)
0x21 (0x41)
Read/Write
Initial Value
Bit
0x20 (0x40)
Read/Write
Initial Value
EEAR10 is only valid for ATmega645P and ATmega6450P.
EEAR7
MSB
R/W
R/W
15
7
0
R
X
–
7
0
EEAR6
R/W
R/W
14
6
0
R
X
–
6
0
EEAR5
R/W
R/W
13
5
0
R
X
–
5
0
EEAR4
R/W
R/W
12
R
4
0
–
4
0
X
EEAR3
R/W
R/W
11
R
3
0
–
3
0
X
ATmega325P/3250P
EEAR10
EEAR2
R/W
R/W
R/W
10
2
0
2
X
X
EEAR9
EEAR1
R/W
R/W
R/W
9
1
X
X
1
0
EEAR8
EEAR0
R/W
R/W
LSB
R/W
8
0
X
X
0
0
EEARH
EEARL
EEDR
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