ATMEGA64_0610 Datasheet, PDF (80/393 Pages) ATMEL Corporation – 8-bit Microcontroller with 64K Bytes In-System Programmable Flash

Table 37. Overriding Signals for Alternate Functions PD7..PD4
Signal Name
PD7/T2
PD6/T1
PD5/XCK1
PUOE
0
0
0
PUOV
0
0
0
DDOE
0
0
0
DDOV
0
0
0
PVOE
0
0
UMSEL1
PVOV
0
0
XCK1 OUTPUT
DIEOE
0
0
0
DIEOV
0
0
0
DI
T2 INPUT
T1 INPUT
XCK1 INPUT
AIO
–
–
–
PD4/ICP1
0
0
0
0
0
0
0
0
ICP1 INPUT
–
Table 38. Overriding Signals for Alternate Functions in PD3..PD0⁽¹⁾
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PD3/INT3/TXD1
TXEN1
0
TXEN1
1
TXEN1
PD2/INT2/RXD1
RXEN1
PORTD2 • PUD
RXEN1
0
0
PD1/INT1/SDA
TWEN
PORTD1 • PUD
TWEN
SDA_OUT
TWEN
PD0/INT0/SCL
TWEN
PORTD0 • PUD
TWEN
SCL_OUT
TWEN
PVOV
TXD1
0
0
0
DIEOE
DIEOV
DI
AIO
INT3 ENABLE
1
INT3 INPUT
–
INT2 ENABLE
1
INT2 INPUT/RXD1
–
INT1 ENABLE
1
INT1 INPUT
SDA INPUT
INT0 ENABLE
1
INT0 INPUT
SCL INPUT
Note:
1. When enabled, the Two-wire Serial Interface enables Slew-rate controls on the output
pins PD0 and PD1. This is not shown on the figure. In addition, spike filters are con-
nected between the AIO outputs shown in the port figure and the digital logic of the
TWI module.
80 ATmega64(L)
2490L–AVR–10/06