ATmega162 datasheet(81/324 Pages) ATMEL

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2513K–AVR–07/09

ATmega162/V

Alternate Functions of

Port E

The Port E pins with alternate functions are shown in Table 41.

The alternate pin configuration is as follows:

• OC1B – Port E, Bit 2

OC1B, Output Compare Match B output: The PE2 pin can serve as an external output for the

Timer/Counter1 Output Compare B. The pin has to be configured as an output (DDE0 set (one))

to serve this function. The OC1B pin is also the output pin for the PWM mode timer function.

Table 42 relate the alternate functions of Port E to the overriding signals shown in Figure 32 on

page 68.

•ALE – Port E, Bit 1

ALE is the external data memory Address Latch Enable signal.

• ICP1/INT2 – Port E, Bit 0

ICP1, Input Capture Pin: The PE0 pin can act as an Input Capture pin for Timer/Counter1.

INT2, External Interrupt Source 2: The PE0 pin can serve as an external interrupt source.

Table 41. Port E Pins Alternate Functions

Port Pin

Alternate Function

PE2

OC1B (Timer/Counter1 Output CompareB Match Output)

PE1

ALE (Address Latch Enable to external memory)

PE0

ICP1 (Timer/Counter1 Input Capture Pin)

INT2 (External Interrupt 2 Input)

Table 42. Overriding Signals for Alternate Functions PE2..PE0

Signal Name

PE2

PE1

PE0

PUOE

SRE

PUOV

DDOE

SRE

DDOV

PVOE

OC1B ENABLE

SRE

PVOV

OC1B

ALE

DIEOE

INT2 ENABLED

DIEOV

INT2 INPUT/ ICP1 INPUT

AIO

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