Datasheet

ATmega164A/PA/324A/PA/644A/PA/1284/P
 2018 Microchip Technology Inc. Data Sheet Complete DS40002070A-page 93
Table 14-10. Overriding Signals for Alternate Functions in PC7:PC4
Signal
name
PC7/TOSC2/
PCINT23
PC6/TOSC1/
PCINT22
PC5/TDI/
PCINT21
PC4/TDO/
PCINT20
PUOE AS2 • EXCLK AS2 JTAGEN JTAGEN
PUOV 0 0 1 1
DDOE AS2 • EXCLK AS2 JTAGEN JTAGEN
DDOV 0 0 0
SHIFT_IR +
SHIFT_DR
PVOE 0 0 0 JTAGEN
PVOV 0 0 0 TDO
DIEOE
AS2 • EXCLK +
PCINT23 • PCIE2
AS2 +
PCINT22 • PCIE2
JTAGEN +
PCINT21 • PCIE2
JTAGEN +
PCINT20 • PCIE2
DIEOV AS2 EXCLK + AS2 JTAGEN JTAGEN
DI PCINT23 INPUT PCINT22 INPUT PCINT21 INPUT PCINT20 INPUT
AIO T/C2 OSC OUTPUT
T/C2 OSC
INPUT
TDI INPUT –
Table 14-11. Overriding Signals for Alternate Functions in PC3:PC0
Signal
name
PC3/TMS/
PCINT19
PC2/TCK/
PCINT18
PC1/SDA/
PCINT17
PC0/SCL/
PCINT16
PUOE JTAGEN JTAGEN TWEN TWEN
PUOV 1 1 PORTC1 • PUD PORTC0 • PUD
DDOE JTAGEN JTAGEN TWEN TWEN
DDOV 0 0 0 0
PVOE 0 0 TWEN TWEN
PVOV 0 0 SDA OUT SCL OUT
DIEOE
JTAGEN +
PCINT19 • PCIE2
JTAGEN +
PCINT18 • PCIE2
PCINT17 • PCIE2 PCINT16 • PCIE2
DIEOV JTAGEN JTAGEN 1 1
DI PCINT19 INPUT PCINT18 INPUT PCINT17 INPUT PCINT16 INPUT
AIO TMS INPUT TCK INPUT SDA INPUT SCL INPUT