Renesas RX Series User Manual

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:
00000000
Bit Symbol Bit Name Description R/W
b0 TCST 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:
00000000
Bit Symbol Bit Name Description R/W
b1, b0 TOMS[1:0] Timer Operating Mode Select*
1
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 TWRC 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 TCSS[2:0] Timer Count Clock Source Select*
1
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

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English