參數(shù)資料
型號(hào)： M38C29MC-XXXHP
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(jī)
文件頁(yè)數(shù)： 45/63頁(yè)
文件大小： 1000K
代理商： M38C29MC-XXXHP
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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