AT32UC3C2512C Automotive Atmel Corporation, AT32UC3C2512C Automotive Datasheet - Page 24

• Manufacturer Part Number: AT32UC3C2512C Automotive
• Manufacturer: Atmel Corporation

6.5.5
6.5.6
6.5.7
24
Atmel ATtiny24/44/84 [Preliminary]
GPIOR2 – General Purpose I/O Register 2
GPIOR1 – General Purpose I/O Register 1
GPIOR0 – General Purpose I/O Register 0
• Bit 0 – EERE: EEPROM Read Enable
The EEPROM read enable signal, EERE, is the read strobe for the EEPROM. When the cor-
rect address is set up in the EEAR register, the EERE bit must be written to logical one to
trigger the EEPROM read. The EEPROM read access takes one instruction, and the
requested data are available immediately. When the EEPROM is read, the CPU is halted for
four cycles before the next instruction is executed. The user should poll the EEPE bit before
starting the read operation. If a write operation is in progress, it is not possible to read the
EEPROM or change the EEAR register.
Bit
0x15 (0x35)
Read/Write
Initial Value
Bit
0x14 (0x34)
Read/Write
Initial Value
Bit
0x13 (0x33)
Read/Write
Initial Value
MSB
MSB
MSB
R/W
R/W
R/W
7
0
7
0
7
0
R/W
R/W
R/W
6
0
6
0
6
0
R/W
R/W
R/W
5
0
5
0
5
0
R/W
R/W
R/W
4
0
4
0
4
0
R/W
R/W
R/W
3
0
3
0
3
0
R/W
R/W
R/W
2
0
2
0
2
0
R/W
R/W
R/W
1
0
1
0
1
0
LSB
LSB
LSB
R/W
R/W
R/W
0
0
0
0
0
0
7701E–AVR–02/11
GPIOR2
GPIOR1
GPIOR0