ATA6602-PLQW ATMEL [ATMEL Corporation], ATA6602-PLQW Datasheet - Page 42

• Manufacturer Part Number: ATA6602-PLQW
• Description: Microcontroller with LIN Transceiver, 5V Regulator and Watchdog
• Manufacturer: ATMEL [ATMEL Corporation]

4.5.3.2
4.5.3.3
4.5.3.4
42
ATA6602/ATA6603
The EEPROM Address Register – EEARH and EEARL
The EEPROM Data Register – EEDR
The EEPROM Control Register – EECR
• Bits 15..9 – Res: Reserved Bits
• Bits 8..0 – EEAR8..0: EEPROM Address
• Bits 7..0 – EEDR7.0: EEPROM Data
• Bits 7..6 – Res: Reserved Bits
• Bits 5, 4 – EEPM1 and EEPM0: EEPROM Programming Mode Bits
Initial Value
Initial Value
Read/Write
Initial Value
Read/Write
Read/Write
These bits are reserved bits in the ATA6602/ATA6603 and will always read as zero.
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 255/511/511. The initial value of EEAR is undefined. A proper value must be written
before the EEPROM may be accessed.
EEAR8 is an unused bit in ATA6602/ATA6603 and must always be written to zero.
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.
These bits are reserved bits in the ATA6602/ATA6603 and will always read as zero
The EEPROM Programming mode bit setting defines which programming action that will be
triggered when writing EEPE. It is possible to program data in one atomic operation (erase
the old value and program the new value) or to split the Erase and Write operations in two
different operations.
Bit
Bit
Bit
EEAR7
MSB
R/W
R/W
15
R
R
–
7
0
X
7
0
7
–
0
EEAR6
R/W
R/W
14
R
R
X
6
–
0
–
6
0
6
0
EEPM1
EEAR5
R/W
R/W
R/W
13
X
R
5
–
5
0
X
5
0
EEPM0
EEAR4
R/W
R/W
R/W
12
4
X
R
X
4
0
–
4
0
EEAR3
EERIE
R/W
R/W
R/W
11
R
3
0
X
3
0
–
3
0
EEMPE
EEAR2
R/W
R/W
R/W
10
R
X
2
0
2
0
–
2
0
EEAR1
EEPE
R/W
R/W
R/W
R
X
1
0
1
X
9
–
1
0
EEAR8
EEAR0
EERE
LSB
R/W
R/W
R/W
R/W
X
X
0
0
8
0
0
0
4921C–AUTO–01/07
EEARH
EEARL
EEDR
EECR