HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 605
HD6412332
Manufacturer Part Number
HD6412332
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412332.pdf
(1244 pages)
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12.6.4
If compare match events A and B occur at the same time, the 8-bit timer operates in accordance
with the priorities for the output statuses set for compare match A and compare match B, as shown
in table 12.4.
Table 12.4 Timer Output Priorities
Output Setting
Toggle output
1 output
0 output
No change
12.6.5
TCNT may increment erroneously when the internal clock is switched over. Table 12.5 shows the
relationship between the timing at which the internal clock is switched (by writing to the CKS1
and CKS0 bits) and the TCNT operation.
When the TCNT clock is generated from an internal clock, the falling edge of the internal clock
pulse is detected. If clock switching causes a change from high to low level, as shown in case 3 in
table 12.5, a TCNT clock pulse is generated on the assumption that the switchover is a falling
edge. This increments TCNT.
The erroneous incrementation can also happen when switching between internal and external
clocks.
Contention between Compare Matches A and B
Switching of Internal Clocks and TCNT Operation
Priority
High
Low
Rev.4.00 Sep. 07, 2007 Page 575 of 1210
REJ09B0245-0400
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