M38203M4 Datasheet, PDF (55/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

φ CLOCK OUTPUT FUNCTION
The internal system clock φ can be output from port P41 by setting
the φ output control register. Set bit 1 of the port P4 direction reg-
ister to when outputting φ clock.
MITSUBISHI MICROCOMPUTERS
3820 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7
Fig. 38 Structure of φ output control register
0
φ output control register
(CKOUT : address 002A16)
φ output control bit
0 : Port function
1 : φ clock output
Not used (return “0” when read)
3820 GROUP USER’S MANUAL
1-39