ATMEga64L ATMEL Corporation, ATMEga64L Datasheet - Page 76

• Manufacturer Part Number: ATMEga64L
• Description: 8-bit AVR Microcontroller with 64K Bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

Alternate Functions of Port D
76
ATmega64(L)
Table 35. Overriding Signals for Alternate Functions in PC3..PC0
Note:
The Port D pins with alternate functions are shown in Table 36.
Table 36. Port D Pins Alternate Functions
Note:
The alternate pin configuration is as follows:
• T2 – Port D, Bit 7
T2, Timer/Counter2 Counter Source.
• T1 – Port D, Bit 6
T1, Timer/Counter1 Counter Source.
• XCK1 – Port D, Bit 5
XCK1, USART1 External Clock. The Data Direction Register (DDD5) controls whether
the clock is output (DDD5 set) or input (DDD5 cleared). The XCK1 pin is active only
when the USART1 operates in synchronous mode.
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Port Pin
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
1. XMM = 0 in ATmega103 compatibility mode.
1. XCK1, TXD1, RXD1, SDA, and SCL not applicable in ATmega103 compatibility
mode.
Alternate Function
T2 (Timer/Counter2 Clock Input)
T1 (Timer/Counter1 Clock Input)
IC1 (Timer/Counter1 Input Capture Trigger)
XCK1
INT3/TXD1
INT2/RXD1
INT1/SDA
INT0/SCL
PC3/A11
SRE • (XMM<5)
0
SRE • (XMM<5)
1
SRE • (XMM<5)
A11
0
0
–
–
(1)
(USART1 External Clock Input/Output)
(1)
(1)
(1)
(1)
(External Interrupt0 Input or TWI Serial CLock)
(External Interrupt1 Input or TWI Serial DAta)
(External Interrupt3 Input or UART1 Transmit Pin)
(External Interrupt2 Input or UART1 Receive Pin)
PC2/A10
SRE • (XMM<6)
0
SRE • (XMM<6)
1
SRE • (XMM<6)
A10
0
0
–
–
PC1/A9
SRE • (XMM<7)
0
SRE • (XMM<7)
1
SRE • (XMM<7)
A9
0
0
–
–
(1)
PC0/A8
SRE • (XMM<7)
0
SRE • (XMM<7)
1
SRE • (XMM<7)
A8
0
0
–
–
2490G–AVR–03/04