10.1.3 Input/Output Pins
Table 10-2 summarizes the ITU pins.
Table 10-2 ITU Pins
Abbre-
viation
TCLKA
Input/
Output
Input
Channel
Common
Name
Clock input A
Function
External clock A input pin
(phase-A input pin in phase counting mode)
External clock B input pin
(phase-B input pin in phase counting mode)
External clock C input pin
External clock D input pin
GRA0 output compare or input capture pin
PWM output pin in PWM mode
GRB0 output compare or input capture pin
Clock input B
TCLKB
Input
Clock input C
Clock input D
Input capture/output TIOCA
0
compare A0
Input capture/output TIOCB
0
compare B0
Input capture/output TIOCA
1
compare A1
Input capture/output TIOCB
1
compare B1
Input capture/output TIOCA
2
compare A2
Input capture/output TIOCB
2
compare B2
Input capture/output TIOCA
3
compare A3
TCLKC
TCLKD
Input
Input
Input/
output
Input/
output
Input/
output
Input/
output
Input/
output
Input/
output
Input/
output
0
1
GRA1 output compare or input capture pin
PWM output pin in PWM mode
GRB1 output compare or input capture pin
2
GRA2 output compare or input capture pin
PWM output pin in PWM mode
GRB2 output compare or input capture pin
3
GRA3 output compare or input capture pin
PWM output pin in PWM mode, comple-
mentary PWM mode, or reset-synchronized
PWM mode
GRB3 output compare or input capture pin
PWM output pin in complementary PWM
mode or reset-synchronized PWM mode
GRA4 output compare or input capture pin
PWM output pin in PWM mode, comple-
mentary PWM mode, or reset-synchronized
PWM mode
GRB4 output compare or input capture pin
PWM output pin in complementary PWM
mode or reset-synchronized PWM mode
PWM output pin in complementary PWM
mode or reset-synchronized PWM mode
PWM output pin in complementary PWM
mode or reset-synchronized PWM mode
Input capture/output TIOCB
3
compare B3
Input/
output
4
Input capture/output TIOCA
4
compare A4
Input/
output
Input capture/output TIOCB
4
compare B4
Input/
output
Output compare XA4 TOCXA
4
Output
Output compare XB4 TOCXB
4
Output
303