Hitachi H8/3637 Hardware Manual page 167

Bit 7: TMA7 Bit 6: TMA6
0 0
1
1 0
1
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:
TMA3 TMA2
0 0
1
1 0
1
162
Bit 5: TMA5
0
1
0
1
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
Clock Output
ø/32
ø/16
ø/8
ø/4
ø /32
W
ø /16
W
ø /8
W
ø /4
W
Prescaler and Divider Ratio
or Overflow Period
PSS, ø/8192 (initial value)
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
PSW, 0.25 s
PSW, 0.03125 s
PSW and TCA are reset
(initial value)
Description
Function
Interval timer
Clock time base