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参数资料
| 型号： | M38748EAF-XXXFS |
| 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： | 33/92页 |
| 文件大小： | 1292K |
| 代理商： | M38748EAF-XXXFS |
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33
3874 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
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 timer 123 mode register.
G
Timer 2 write control
When the timer 2 write control bit is “1”, and 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.
When the timer 2 write control bit is “0”, and 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.
G
Timer 2 output control
An inversion signal from T
OUT
pin is output each time timer 2
underflows.
In this case, set the port P5
0
direction register to the output mode.
I
Note
G
Timer 1 to timer 3
When the count source of timer 1 to 3 is changed, the timer count-
ing 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. 25 Structure of timer 123 mode register
T
OUT
output active edge switch bit
0 : Start at “H” output
1 : Start at “L” output
T
OUT
output control bit
0 : T
OUT
output disabled
1 : T
OUT
output enabled
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(X
IN
)/16
(or f(X
CIN
)/16 in low-speed mode)
Timer 3 count source selection bit
0 : Timer 1 output
1 : f(X
IN
)/16
(or f(X
CIN
)/16 in low-speed mode)
Timer 1 count source selection bit
0 : f(X
IN
)/16
(or f(X
CIN
)/16 in low-speed mode)
1 : f(X
CIN
)
Not used (return “0” when read)
Timer 123 mode register
(T123M :address 0029
16
)
Note :
Internal clock
φ
is f(X
CIN
)/2 in the low-speed mode.
b7
b0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M38748EAF-XXXGP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EAT-XXXFS | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EAT-XXXGP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EBD-XXXFS | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38748EBD-XXXGP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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