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參數(shù)資料
| 型號： | M38C89MF-XXXFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP144 |
| 封裝： | 20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144 |
| 文件頁數(shù)： | 17/55頁 |
| 文件大?。?/td> | 981K |
| 代理商： | M38C89MF-XXXFP |
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23
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C8 Group
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.
qTimer 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.
sNotes 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
Timer 123 mode register
(T123M :address 002916)
* Internal clock
φ is XCIN/2 in the low-speed mode.
b7
b0
Timer 1 count source selection bit
0 : f(XIN)/16
(or f(XCIN)/16 in low-speed mode*)
1 : f(XCIN)/32
Not used
Timer 2 write control bit
0 : Write data in latch and counter
1 : Write data in latch only
Timer 2 count source selection bit
0 : Timer 1 output
1 : f(XIN)/16
(or f(XCIN)/16 in low-speed mode*)
Timer 3 count source selection bit
0 : Timer 1 output
1 : f(XCIN)/32
Not used (return “0” when read)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38D20F1XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D20F1XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D20F2XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D20F2XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38D20F3XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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