
28
7674F–AVR–09/09
ATmega164P/324P/644P
6.6.4
GPIOR2 – General Purpose I/O Register 2
6.6.5
GPIOR1 – General Purpose I/O Register 1
6.6.6
GPIOR0 – General Purpose I/O Register 0
Note:
1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper sector) or
SRW00 (lower sector). The ALE pulse in period T4 is only present if the next instruction
accesses the RAM (internal or external).
Bit
7
6
543210
MSB
LSB
GPIOR2
Read/Write
R/W
Initial Value
0
000000
Bit
76543210
MSB
LSB
GPIOR1
Read/Write
R/W
Initial Value
00000000
Bit
7
6
543210
MSB
LSB
GPIOR0
Read/Write
R/W
Initial Value
0
000000