H83814 Datasheet, PDF (182/456 Pages) Renesas Technology Corp – single-chip microcomputers

Bit 4: Reserved bit
Bit 4 is reserved; it is always read as 1, and cannot be modified.
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.
Bit 3 Bit 2 Bit 1 Bit 0
TMA3 TMA2 TMA1 TMA0
0
0
0
0
1
1
0
1
1
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
0
0
1
1
0
1
Description
Prescaler and Divider Ratio
or Overflow Period
Function
PSS, ø/8192
(initial value) Interval timer
PSS, ø/4096
PSS, ø/2048
PSS, ø/512
PSS, ø/256
PSS, ø/128
PSS, ø/32
PSS, ø/8
PSW, 1 s
PSW, 0.5 s
Clock time
base
PSW, 0.25 s
PSW, 0.03125 s
PSW and TCA are reset
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