Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 740 of 1823
Jul 31, 2019
RX23W Group 26. 8-Bit Timer (TMR)
26.3.2 External Counter Reset Input
Figure 26.4 shows an example of the 8-bit timer being used to generate a pulse which is output after a desired delay time
from a TMRIn input.
1. Set the TCR.CCLR[1:0] bits to 11b (cleared by external counter reset signal) and set the TMRIS bit in TCCR to 1
(cleared when the external counter reset signal is high) so that TCNT is cleared at the high level input of the TMRIn
signal.
2. Set the TCSR.OSA[1:0] bits to 10b (high output) and the TCSR.OSB[1:0] bits to 01b (low output), causing the
output to change to high at a compare match of TCORA and to low at a compare match of TCORB.
With these settings, the 8-bit timer provides pulses output at a desired delay time from a TMRIn input determined by
TCORA and with a pulse width determined by TCORB and TCORA.
Figure 26.4 Example of External Counter Reset Signal Input (n = 0 to 2)
TCORA
TCORB
00h
TMRIn
TMOn
TCNT

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English