SH7751 Datasheet, PDF (417/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

12. Timer Unit (TMU)
Bit 0—Timer Clock Pin Control (TCOE): Specifies whether timer clock pin TCLK is used as
the external clock or input capture control input pin, or as the on-chip RTC output clock output
pin.
Bit 0: TCOE
Description
0
Timer clock pin (TCLK) is used as external clock input or input capture
control input pin
(Initial value)
1
Timer clock pin (TCLK) is used as on-chip RTC output clock output pin*
Note: * Low-level output in standby mode; high-impedance output in hardware standby mode.
12.2.2 Timer Start Register (TSTR)
TSTR is an 8-bit readable/writable register that specifies whether the channel 0–2 timer counters
(TCNT) are operated or stopped.
TSTR is initialized to H'00 by a power-on or manual reset. In module standby mode, TSTR is not
initialized when the input clock selected by each channel is the on-chip RTC output clock
(RTCCLK), and is initialized only when the input clock is the external clock (TCLK) or internal
clock (Pck).
Bit:
7
6
5
4
3
2
1
0
—
—
—
—
—
STR2 STR1 STR0
Initial value:
0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R/W
R/W
R/W
Bits 7 to 3—Reserved: These bits are always read as 0. A write to these bits is invalid, but the
write value should always be 0.
Bit 2—Counter Start 2 (STR2): Specifies whether timer counter 2 (TCNT2) is operated or
stopped.
Bit 2: STR2
0
1
Description
TCNT2 count operation is stopped
TCNT2 performs count operation
(Initial value)
Rev.4.00 Oct. 10, 2008 Page 319 of 1122
REJ09B0370-0400