Renesas H8/3847R Series Hardware Manual page 300

Section 9 Timers
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
TMA3 TMA2 TMA1
0 0 0
1
1 0
1
1 0 0
1
1 0
1
Rev. 6.00 Aug 04, 2006 page 262 of 680
REJ09B0145-0600
Description
Bit 0 Prescaler and Divider Ratio
TMA0 or Overflow Period
PSS, φ/8192
0
PSS, φ/4096
1
PSS, φ/2048
0
PSS, φ/512
1
PSS, φ/256
0
PSS, φ/128
1
PSS, φ/32
0
PSS, φ/8
1
0 PSW, 1 s
1 PSW, 0.5 s
0 PSW, 0.25 s
1 PSW, 0.03125 s
0 PSW and TCA are reset
1
0
1
Function
(initial value) Interval timer
Clock time base
(when using
32.768 kHz)