Renesas RL78/F14 User Manual

RL78/F13, F14 CHAPTER 7 TIMER RJ
R01UH0368EJ0210 Rev.2.10 556
Dec 10, 2015
7.4 Operation
7.4.1 Reload Register and Counter Rewrite Operation
Regardless of the operating mode, the timing of the rewrite operation to the reload register and the counter differs
depending on the value in the TSTART bit in the TRJCR0 register. When the TSTART bit is 0 (count stops), the count value
is directly written to the reload register and the counter. When the TSTART bit is 1 (count starts), the value is written to the
reload register in synchronization with the count source, and then to the counter in synchronization with the next count
source.
Figure 7-11 shows the Timing of Rewrite Operation with TSTART Bit Value.
Figure 7-11. Timing of Rewrite Operation with TSTART Bit Value
Write 5678H to TRJ0 register by a program
Write 1234H to TRJ0 register by a program
FFFFH 1234H5678H
FFFFH 1234H5678H
Count source
TSTART bit in TRJCR0
register
TRJ0 register
Reload register load signal
Reload register load clock
Counter load signal
Counter load clock
Reload register
Timer RJ0 counter
5678HFFFFH
1232H5677H5676H 5675H5674H5673H5672H 5671H5670H566FH 1234H1233H 1231H1230H
Write 1 to TSTART bit in TRJCR0 register by a program
Register write clock

Renesas RL78/F14 Specifications

General

Brand	Renesas
Model	RL78/F14
Category	Computer Hardware
Language	English