HD6433937 Datasheet, PDF (196/521 Pages) Hitachi Semiconductor – Hardware Manual

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
TMA3
0
1
Bit 2
TMA2
0
1
0
1
Bit 1 Bit 0
TMA1 TMA0
0
0
1
1
0
1
0
0
1
1
0
1
0
0
1
1
0
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, ø_w/32768
PSW, ø_w/16384
PSW, ø_w/8192
PSW, ø_w/1024
PSW and TCA are reset
Time base
(overflow period)
184