Bits 3 to 0: Internal clock select (TMA3 to TMA0)
Bits 3 to 0 select the clock input to TCA. The selection is made as follows.
Description
Bit 3
Bit 2
Bit 1
Bit 0
Prescaler and Divider Ratio
TMA3 TMA2 TMA1 TMA0 or Overflow Period
Function
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PSS, ø/8192
PSS, ø/4096
PSS, ø/2048
PSS, ø/512
(initial value) Interval timer
PSS, ø/256
PSS, ø/128
PSS, ø/32
PSS, ø/8
1
PSW, 1 s
Clock time base
(when using
PSW, 0.5 s
PSW, 0.25 s
PSW, 0.03125 s
PSW and TCA are reset
32.768 kHz)
185
ETC [ ETC ]
