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参数资料
| 型号： | M38C80E4-XXXFP |
| 厂商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 单芯片8位CMOS微机 |
| 文件页数： | 23/51页 |
| 文件大小： | 874K |
| 代理商： | M38C80E4-XXXFP |
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23
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C8 Group
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
Timer 1, Timer 2, Timer 3
Timer 1, timer 2, and timer 3 are 8-bit timers. The count source for
each timer can be selected by the timer 123 mode register. The timer
latch value is not affected by a change of the count source. However,
because changing the count source may cause an inadvertent count
down of the timer. Therefore, rewrite the value of timer whenever the
count source is changed.
G
Timer 2 write control
If the timer 2 write control bit is
“
0
”
, when the value is written in the
address of timer 2, the value is loaded in the timer 2 and the latch at
the same time.
If the timer 2 write control bit is
“
1
”
, when the value is written in the
address of timer 2, the value is loaded only in the latch. The value in
the latch is loaded in timer 2 after timer 2 underflows.
I
Notes on timer 1 to timer 3
When the count source of timer 1 to 3 is changed, the timer counting
value may be changed large because a thin pulse is generated in
count input of timer. If timer 1 output is selected as the count source
of timer 2 or timer 3, when timer 1 is written, the counting value of
timer 2 or timer 3 may be changed large because a thin pulse is
generated in timer 1 output.
Therefore, set the value of timer in the order of timer 1, timer 2 and
timer 3 after the count source selection of timer 1 to 3.
Fig. 19 Structure of timer 123 mode register
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