Atmel AT90PWM2 Manual page 73

11.3.4 Alternate Functions of Port D
AT90PWM2/3/2B/3B
74
The Port D pins with alternate functions are shown in
Table 11-9. Port D Pins Alternate Functions
Port Pin Alternate Function
PD7 ACMP0 (Analog Comparator 0 Positive Input )
ADC3 (Analog Input Channel 3 )
PD6 ACMPM reference for analog comparators
INT0
ADC2 (Analog Input Channel 2)
PD5
ACMP2 (Analog Comparator 2 Positive Input )
ADC1 (Analog Input Channel 1)
RXD (Dali/UART Rx data)
PD4
ICP1 (Timer 1 input capture)
SCK_A (Programming & alternate SPI Clock)
TXD (Dali/UART Tx data)
OC0A (Timer 0 Output Compare A)
PD3
SS (SPI Slave Select)
MOSI_A (Programming & alternate SPI Master Out Slave In)
PSCIN2 (PSC 2 Digital Input)
PD2 OC1A (Timer 1 Output Compare A)
MISO_A (Programming & alternate Master In SPI Slave Out)
PSCIN0 (PSC 0 Digital Input )
PD1
CLKO (System Clock Output)
PSCOUT00 output
PD0 XCK (UART Transfer Clock)
SS_A (Alternate SPI Slave Select)
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.
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