12.2.3 Timer Start Register 2 (TSTR2) (SH7750R Only)
TSTR2 is an 8-bit readable/writable register that specifies whether the channels 3–4 timer counters
(TSTR2) run or are stopped.
TSTR2 is initialized to H'00 by a power-on reset and retains its value in standby mode. If standby
mode is entered when the STR3 or STR4 bit is set to 1, counting is halted at the same time as the
peripheral module clock is stopped. Counting is restarted on resumption of the clock-signal
supply.
Bit:
7
—
0
6
—
0
5
—
0
4
—
0
3
—
0
2
—
0
1
STR4
0
0
STR3
0
Initial value:
R/W:
R
R
R
R
R
R
R/W
R/W
Bits 7 to 2—Reserved: These bits are always read as 0. Writing to these bits is invalid. If a value
is written to these bits, it should always be 0.
Bit 1—Counter Start 4 (STR4): Specifies whether timer counter 4 (TCNT4) runs or is stopped.
Bit 1: STR4
Description
0
1
Counting by TCNT4 is stopped
Counting by TCNT4 proceeds
(Initial value)
Bit 0—Counter Start 3 (STR3): Specifies whether timer counter 3 (TCNT3) runs or is stopped.
Bit 0: STR3
Description
0
1
Counting by TCNT3 is stopped
Counting by TCNT3 proceeds
(Initial value)
Rev. 6.0, 07/02, page 297 of 986
RENESAS [ RENESAS TECHNOLOGY CORP ]
