HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 688
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HD6412373R
Manufacturer Part Number
HD6412373R
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412373R.pdf
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.10.3 Caution on Cycle Setting
When counter clearing by compare match is set, TCNT is cleared in the final state in which it
matches the TGR value (the point at which the count value matched by TCNT is updated).
Consequently, the actual counter frequency is given by the following formula:
Where f: Counter frequency
11.10.4 Contention between TCNT Write and Clear Operations
If the counter clearing signal is generated in the T
takes precedence and the TCNT write is not performed. Figure 11.45 shows the timing in this
case.
Rev.7.00 Mar. 18, 2009 page 620 of 1136
REJ09B0109-0700
f =
φ: Operating frequency
N: TGR set value
φ
Address
Write signal
Counter clearing
signal
TCNT
Figure 11.45 Contention between TCNT Write and Clear Operations
(N + 1)
φ
N
TCNT write cycle
TCNT address
T
1
2
state of a TCNT write cycle, TCNT clearing
T
2
H'0000
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