HD64F38024HV Datasheet, PDF (290/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 9 Timers
Timer Control Register F (TCRF)
Bit:
Initial value:
Read/Write:
7
TOLH
0
W
6
CKSH2
0
W
5
CKSH1
0
W
4
CKSH0
0
W
3
TOLL
0
W
2
CKSL2
0
W
1
CKSL1
0
W
0
CKSL0
0
W
TCRF is an 8-bit write-only register that switches between 16-bit mode and 8-bit mode, selects the
input clock from among four internal clock sources or external event input, and sets the output
level of the TMOFH and TMOFL pins.
TCRF is initialized to H'00 upon reset.
Bit 7—Toggle Output Level H (TOLH)
Bit 7 sets the TMOFH pin output level. The output level is effective immediately after this bit is
written.
Bit 7
TOLH
0
1
Description
Low level
High level
(initial value)
Bits 6 to 4—Clock Select H (CKSH2 to CKSH0)
Bits 6 to 4 select the clock input to TCFH from among four internal clock sources or TCFL
overflow.
Bit 6
CKSH2
0
0
0
0
1
1
1
1
Bit 5
CKSH1
0
0
1
1
0
0
1
1
Bit 4
CKSH0
0
1
0
1
0
1
0
1
Description
16-bit mode, counting on TCFL overflow signal
Use prohibited
Internal clock: counting on φ/32
Internal clock: counting on φ/16
Internal clock: counting on φ/4
Internal clock: counting on φw/4
(initial value)
Rev. 8.00 Mar. 09, 2010 Page 268 of 658
REJ09B0042-0800