Datasheet

ATmega164A/PA/324A/PA/644A/PA/1284/P
 2018 Microchip Technology Inc. Data Sheet Complete DS40002070A-page 91
14.3.3 Alternate Functions of Port C
The Port C pins with alternate functions are shown in Table 14-9.
• TOSC2/PCINT23 – Port C, Bit7
TOSC2, Timer Oscillator pin 2. The PC7 pin can serve as an external interrupt source to the MCU.
PCINT23, Pin Change Interrupt source 23: The PC7 pin can serve as an external interrupt source.
Table 14-8. Overriding Signals for Alternate Functions in PB3:PB0
Signal
name
PB3/AIN1/OC0B/
PCINT11
PB2/AIN0/INT2/
PCINT10
PB1/T1/CLKO/PCI
NT9
PB0/T0/XCK/
PCINT8
PUOE 0 0 0 0
PUOV 0 0 0 0
DDOE 0 0 CKOUT 0
DDOV 0 0 CKOUT 0
PVOE OC0B ENABLE 0 CKOUT 0
PVOV OC0B 0 CLK I/O 0
DIEOE PCINT11 • PCIE1
INT2 ENABLE
PCINT10 • PCIE1
PCINT9 • PCIE1 PCINT8 • PCIE1
DIEOV 1 1 1 1
DI PCINT11 INPUT
INT2 INPUT
PCINT10 INPUT
T1 INPUT
PCINT9 INPUT
T0 INPUT
PCINT8 INPUT
AIO AIN1 INPUT AIN0 INPUT – –
Table 14-9. Port C pins alternate functions
Port pin Alternate function
PC7
TOSC2 (Timer Oscillator pin 2)
PCINT23 (Pin Change Interrupt 23)
PC6
TOSC1 (Timer Oscillator pin 1)
PCINT22 (Pin Change Interrupt 22)
PC5
TDI (JTAG Test Data Input)
PCINT21 (Pin Change Interrupt 21)
PC4
TDO (JTAG Test Data Output)
PCINT20 (Pin Change Interrupt 20)
PC3
TMS (JTAG Test Mode Select)
PCINT19 (Pin Change Interrupt 19)
PC2
TCK (JTAG Test Clock)
PCINT18 (Pin Change Interrupt 18)
PC1
SDA (two-wire Serial Bus Data Input/Output Line)
PCINT17 (Pin Change Interrupt 17)
PC0
SCL (two-wire Serial Bus Clock Line)
PCINT16 (Pin Change Interrupt 16)