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參數資料
| 型號： | M38C2XMX |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機 |
| 文件頁數： | 45/63頁 |
| 文件大?。?/td> | 1000K |
| 代理商： | M38C2XMX |
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45
38C2 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
Some parametric limits are subject to change.
CLOCK OUTPUT FUNCTION
A system clock
φ
can be output from I/O port P3
6
.The triple function
of I/O port, timer 2 output function and system clock
φ
output function
is performed by the clock output control register (address 0018
16
)
and the timer 2 output selection bit of the timer 12 mode register
(address 0025
16
).
In order to output a system clock
φ
from I/O port P3
6
, set the timer 2
output selection bit and bit 0 of the clock output control register to
“
1
”
.
When the clock output function is selected, a clock is output while
the direction register of port P3
6
is set to the output mode.
P3
6
is switched to the port output or the output (timer 2 output and
the clock output) except port at the cycle after the timer 2 output
control bit is switched.
Fig. 46 Block diagram of Clock output function
Fig. 45 Structure of clock output control register
b0
Not used (returns
“
0
”
when read)
P3
clock output control bit
0: Timer 2 output
1: System clock
φ
output
Clock output control register
(CKOUT : address 0018
16
)
b7
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r
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(
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)
T
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:
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“
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“
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”
“
1
”
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