AT90PWM3 datasheet(73/361 Pages) ATMEL

73 / 361 page

4317J–AVR–08/10

AT90PWM2/3/2B/3B

11.3.4

Alternate Functions of Port D

The Port D pins with alternate functions are shown in Table 11-9.

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 Ana-

log 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 Ana-

log 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 11-9.

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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