ATMEGA64-16MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64-16MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

Table 35. Overriding Signals for Alternate Functions in PC3..PC0(1)

Signal Name

PUOE

PUOV

DDOE

DDOV

PVOE

PC3/A11

SRE • (XMM<5)

0

SRE • (XMM<5)

1

SRE • (XMM<5)

PC2/A10

SRE • (XMM<6)

0

SRE • (XMM<6)

1

SRE • (XMM<6)

PC1/A9

SRE • (XMM<7)

0

SRE • (XMM<7)

1

SRE • (XMM<7)

PVOV

A11

A10

A9

DIEOE

0

0

0

DIEOV

0

0

0

DI

–

–

–

AIO

–

–

–

Note: 1. XMM = 0 in ATmega103 compatibility mode.

PC0/A8

SRE • (XMM<7)

0

SRE • (XMM<7)

1

SRE • (XMM<7)

A8

0

0

–

–

Alternate Functions of Port D The Port D pins with alternate functions are shown in Table 36.

Table 36. Port D Pins Alternate Functions

Port Pin

PD7

PD6

PD5

PD4

PD3

PD2

PD1

PD0

Alternate Function

T2 (Timer/Counter2 Clock Input)

T1 (Timer/Counter1 Clock Input)

XCK1(1) (USART1 External Clock Input/Output)

IC1 (Timer/Counter1 Input Capture Trigger)

INT3/TXD1(1) (External Interrupt3 Input or UART1 Transmit Pin)

INT2/RXD1(1) (External Interrupt2 Input or UART1 Receive Pin)

INT1/SDA(1) (External Interrupt1 Input or TWI Serial DAta)

INT0/SCL(1) (External Interrupt0 Input or TWI Serial CLock)

Note: 1. XCK1, TXD1, RXD1, SDA, and SCL not applicable in ATmega103 compatibility

mode.

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.

76 ATmega64(L)

2490G–AVR–03/04

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