
33
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C3 Group
φ output control bit
0 : Port function
1 : φ clock output
φ output control register
(CKOUT : address 002B
16)
b7 b0
Not used (return “0” when read)
φ CLOCK OUTPUT FUNCTION
The internal system clock φ can be output from port P43 by setting
the φ output control register. Set “1” to bit 3 of the port P4 direction
register when outputting φ clock.
Fig. 33 Structure of φ output control register
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