Datasheet

78
ATmega16U4/32U4 [DATASHEET]
Atmel-7766J-USB-ATmega16U4/32U4-Datasheet_04/2016
The following table shows the alternate functions of Port C to the overriding signals shown in Figure 10-5 on
page 72.
10.3.3 Alternate Functions of Port D
The Port D pins with alternate functions are shown below.
The alternate pin configuration is as follows:
• T0/OC.4D/ADC10 – Port D, Bit 7
T0, Timer/Counter0 counter source.
OC.4D: Timer 4 Output Compare D. This pin can be used to generate a high-speed PWM signal from Timer 4
module. The pin has to be configured as an output (DDD7 set “one”) to serve this function.
ADC10: Analog to Digital Converter, Channel 10.
Table 10-7. Overriding Signals for Alternate Functions in PC7..PC6
Signal Name PC7/ICP3/CLKO/OC.4A PC6/OC.3A/OC.4A
PUOE SRE • (XMM<1) SRE • (XMM<2)|OC3A enable
PUOV 0 0
DDOE SRE • (XMM<1) SRE • (XMM<2)
DDOV 1 1
PVOE SRE • (XMM<1) SRE • (XMM<2)
PVOV A15 if (SRE.XMM<2) then A14 else OC3A
DIEOE 0 0
DIEOV 0 0
DI ICP3 input –
AIO – –
Table 10-8. Port D Pins Alternate Functions
Port Pin Alternate Function
PD7
T0/OC.4D/ADC10 (Timer/Counter0 Clock Input or Timer 4 Output Compare D / PWM
output or Analog to Digital Converter channel 10)
PD6
T1/OC.4D/ADC9 (Timer/Counter1 Clock Input or Timer 4 Output Complementary
Compare D / PWM output or Analog to Digital Converter channel 9)
PD5 XCK1/CTS (USART1 External Clock Input/Output or UART flow control CTS signal)
PD4
ICP1/ADC8 (Timer/Counter1 Input Capture Trigger or Analog to Digital Converter
channel 8)
PD3 INT3/TXD1 (External Interrupt3 Input or USART1 Transmit Pin)
PD2 INT2/RXD1 (External Interrupt2 Input or USART1 Receive Pin)
PD1 INT1/SDA (External Interrupt1 Input or TWI Serial DAta)
PD0
INT0/SCL/OC0B (External Interrupt0 Input or TWI Serial CLock or Output Compare for
Timer/Counter0)