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CHAPTER 8 TIMER RJ
Page 231 of 920
8.4
Timer RJ Operation
8.4.1
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 8 - 7 shows the Timing of Rewrite Operation with TSTART Bit Value.
Figure 8 - 7 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
1234H
5678H
FFFFH
1234H
5678H
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
5678H
FFFFH
1232H
5677H5676H 5675H 5674H5673H 5672H5671H 5670H566FH1234H 1233H
1231H 1230H
Write 1 to TSTART bit in TRJCR0 register by a program
Register write clock
Содержание RL78/G1H
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