R01UH0823EJ0100 Rev.1.00
Page 1016 of 1823
Jul 31, 2019
RX23W Group
33. Serial Communications Interface (SCIg, SCIh)
33.2.36
Timer Control Register (TCR)
33.2.37
Timer Mode Register (TMR)
Note 1. Rewrite the TOMS[1:0] and TCSS[2:0] bits only when the timer is stopped (TCST = 0).
TWRC Bit (Counter Write Control)
This bit determines whether a value written to TPRE or TCNT is written to the reload register only or is written to both
the reload register and the counter.
Address(es): SCI12.TCR 0008 B330h
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
—
TCST
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b0
Timer Count Start
0: Stops the timer counting
1: Starts the timer counting
R/W
b7 to b1
—
Reserved
These bits are read as 0. The write value should be 0.
R/W
Address(es): SCI12.TMR 0008 B331h
b7
b6
b5
b4
b3
b2
b1
b0
—
TCSS[2:0]
TWRC
—
TOMS[1:0]
Value after reset:
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Description
R/W
b1, b0
Timer Operating Mode Select*
b1 b0
0 0: Timer mode
0 1: Break Field low width determination mode
1 0: Break Field low width output mode
1 1: Setting prohibited
R/W
b2
—
Reserved
This bit is read as 0. The write value should be 0.
R/W
b3
Counter Write Control
0: Data is written to the reload register and counter
1: Data is written to the reload register only
R/W
b6 to b4
Timer Count Clock Source Select*
b6
b4
0 0 0: PCLK
0 0 1: PCLK/2
0 1 0: PCLK/4
0 1 1: PCLK/8
1 0 0: PCLK/16
1 0 1: PCLK/32
1 1 0: PCLK/64
1 1 1: PCLK/128
R/W
b7
—
Reserved
This bit is read as 0. The write value should be 0.
R/W