AT90PWM2 datasheet(75/365 Pages) ATMEL

75 / 365 page

AT90PWM2/3

4317B–AVR–02/05

Alternate Functions of Port D

The Port D pins with alternate functions are shown in Table 30.

The alternate pin configuration is as follows:

• ACMP0 – Bit 7

ACMP0, Analog Comparator 0 Positive Input. Configure the port pin as input with the

internal pull-up switched off to avoid the digital port function from interfering with the

function of the Analog Comparator.

• ADC3/ACMPM/INT0 – Bit 6

ADC3, Analog to Digital Converter, input channel 3.

ACMPM, Analog Comparators Negative Input. Configure the port pin as input with the

internal pull-up switched off to avoid the digital port function from interfering with the

function of the Analog Comparator.

INT0, External Interrupt source 0. This pin can serve as an external interrupt source to

the MCU.

• ADC2/ACMP2 – Bit 5

ADC2, Analog to Digital Converter, input channel 2.

Table 30. Port D Pins Alternate Functions

Port Pin

Alternate Function

PD7

ACMP0 (Analog Comparator 0 Positive Input )

PD6

ADC3 (Analog Input Channel 3 )

ACMPM reference for analog comparators

INT0

PD5

ADC2 (Analog Input Channel 2)

ACMP2 (Analog Comparator 2 Positive Input )

PD4

ADC1 (Analog Input Channel 1)

RXD (Dali/UART Rx data)

ICP1 (Timer 1 input capture)

SCK_A (Programming & alternate SPI Clock)

PD3

TXD (Dali/UART Tx data)

OC0A (Timer 0 Output Compare A)

SS (SPI Slave Select)

MOSI_A (Programming & alternate SPI Master Out Slave In)

PD2

PSCIN2 (PSC 2 Digital Input)

OC1A (Timer 1 Output Compare A)

MISO_A (Programming & alternate Master In SPI Slave Out)

PD1

PSCIN0 (PSC 0 Digital Input )

CLKO (System Clock Output)

PD0

PSCOUT00 output

XCK (UART Transfer Clock)

SS_A (Alternate SPI Slave Select)

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