R8C/20 Group, R8C/21 Group 14. Timers
Rev.2.00 Aug 27, 2008 Page 139 of 458
REJ09B0250-0200
Figure 14.15 Registers TRBIOC and TRBMR
Timer RB I/O Control Registe
Symbol Address After Reset
TRBIOC
010Ah 00h
Bit Symbol Bit Name Function RW
TOPL
Timer RB output level select
bit
Timer RB output sw itch bit
b7 b6 b5 b4 b3 b2
INOSEG
b1 b0
INOSTG
TOCNT
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
One-shot trigger polarity
select bit
—
(b7-b4)
—
Function varies depending on operating mode
RW
RW
RW
RW
One-shot trigger control bit
Timer RB Mode Registe
Symbol Address After Reset
TRBMR
010Bh 00h
Bit Symbol Bit Name Function RW
NOTES:
1.
2.
b3 b2
TWRC
b1 b0
—
(b2)
TMOD0
RW
TMOD1 RW
Timer RB operating mode
select bits
(1)
b1 b0
0 0 : Timer mode
0 1 : Programmable w aveform generation mode
1 0 : Programmable one-shot generation mode
1 1 : Programmable w ait one-shot generation mode
b7 b6 b5 b4
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
Timer RB w rite control bit
(2)
0 : Write to reload register and counter
1 : Write to reload register only
—
The TWRC bit can be set to either 0 or 1 in timer mode. In programmable w aveform generation mode, programmable
one-shot generation mode, or programmable wait one-shot generation mode, the TWRC bit must be set to 1 (w rite to
reload re
ister onl
.
TCK0 RW
Change bits TMOD1 and TMOD0; TCK1 and TCK0; and TCKCUT w hen both the TSTART and TCSTF bits in the TRBCR
register set to 0 (count stops).
RW
Timer RB count source
cutoff bit
(1)
0 : Provides count source
1 : Cuts off count source
RWTCKCUT
—
(b6)
—
Timer RB count source
select bits
(1)
b5 b4
0 0 : f1
0 1 : f8
1 0 : Timer RA underflow
1 1 : f2
TCK1
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
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