423
Bit 7
Bit 6
Bit 5
Bit 4
Channel
IOB3 IOB2 IOB1 IOB0 Description
3
0
0
0
0
TGR3B is Output disabled
(Initial value)
1
1
0
1
output
compare
register
Initial output is 0
output
0 output at compare match
1 output at compare match
Toggle output at compare
match
1
0
0
Output disabled
1
Initial output is 1
0 output at compare match
1
0
output
1 output at compare match
1
Toggle output at compare
match
1
0
0
1
0
1
*
TGR3B is
input
capture
register
Capture input
source is
TIOCB3 pin
Input capture at rising edge
Input capture at falling edge
Input capture at both edges
1
*
*
Capture input
source is channel
4/count clock
Input capture at TCNT4
count-up/count-down
*
1
*
: Don’t care
Note:
1. When bits TPSC2 to TPSC0 in TCR4 are set to B'000 and ø/1 is used as the TCNT4
count clock, this setting is invalid and input capture is not generated.