ATMEGA64_0610 Datasheet, PDF (86/393 Pages) ATMEL Corporation – 8-bit Microcontroller with 64K Bytes In-System Programmable Flash

• WR – Port G, Bit 0
WR is the external data memory write control strobe.
Table 46 and Table 47 relates the alternate functions of Port G to the overriding signals
shown in Figure 33 on page 71.
Table 46. Overriding Signals for Alternate Functions in PG4..PG1
Signal Name PG4/TOSC1
PG3/TOSC2
PG2/ALE
PUOE
AS0
AS0
SRE
PUOV
0
0
0
DDOE
AS0
AS0
SRE
DDOV
0
0
1
PVOE
0
0
SRE
PVOV
0
0
ALE
DIEOE
AS0
AS0
0
DIEOV
0
0
0
DI
–
–
–
AIO
T/C0 OSC INPUT
T/C0 OSC OUTPUT
–
PG1/RD
SRE
0
SRE
1
SRE
RD
0
0
–
–
Table 47. Overriding Signals for Alternate Functions in PG0
Signal Name
PG0/WR
PUOE
SRE
PUOV
0
DDOE
SRE
DDOV
1
PVOE
SRE
PVOV
WR
DIEOE
0
DIEOV
0
DI
–
AIO
–
86 ATmega64(L)
2490L–AVR–10/06