ATTINY48-MUR Atmel, ATTINY48-MUR Datasheet - Page 25

• Manufacturer Part Number: ATTINY48-MUR
• Description: MCU AVR 4KB FLASH 12MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY48-MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 12MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 28
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 256 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

5.4
5.4.1
5.4.2
5.4.3
8008G–AVR–04/11
Register Description
EEARH and EEARL – EEPROM Address Register
EEDR – EEPROM Data Register
EECR – EEPROM Control Register
• Bits 15:6 – Res: Reserved Bits
These bits are reserved and will always read zero.
• Bits 5:0 – EEAR[5:0]: EEPROM Address
The EEPROM Address Registers – EEARH and EEARL specify the EEPROM address in the
64/64 bytes EEPROM space. The EEPROM data bytes are addressed linearly between 0 and
63/63. The initial value of EEAR is undefined. A proper value must be written before the
EEPROM may be accessed.
• Bits 7:0 – EEDR[7:0]: 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 7:6 – Res: Reserved Bits
These bits are reserved and will always read zero.
• Bits 5:4 – EEPM[1:0]: EEPROM Programming Mode Bits
EEPROM programming mode bits define the action that will be triggered when EEPE is written.
Data can be programmed in a single atomic operation, where the previous value is automatically
Bit
0x21 (0x41)
Read/Write
Initial Value
Bit
0x20 (0x40)
Read/Write
Initial Value
Bit
0x1F (0x3F)
Read/Write
Initial Value
MSB
R/W
15
R
R
R
–
–
7
0
0
7
0
7
–
0
R/W
14
R
R
R
–
–
6
0
0
6
0
6
–
0
EEPM1
EEAR5
R/W
R/W
R/W
13
R
5
X
–
5
0
X
5
0
EEPM0
EEAR4
R/W
R/W
R/W
12
X
R
4
–
4
0
X
4
0
EEAR3
EERIE
R/W
R/W
R/W
11
R
3
0
–
3
0
X
3
0
EEMPE
EEAR2
R/W
R/W
R/W
10
R
–
2
0
X
2
0
2
0
EEAR1
EEPE
R/W
R/W
R/W
R
9
–
1
0
X
1
0
X
1
ATtiny48/88
EEAR0
EERE
R/W
LSB
R/W
R/W
R
X
8
–
0
0
0
0
0
0
EEARH
EEARL
EEDR
EECR
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