M37536M4 Datasheet, PDF (34/45 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
7536 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
XIN
XOUT
Rd
Rf
Main clock division ratio selection bit
Middle-speed, High-speed, double -speed mode
1/2
1/4
1/2
Prescaler 12
Ring oscillator
mode
Timer 1
Main clock division
ratio selection bit
Middle-speed mode
High-speed mode
Ring oscillator
(Note)
QS
Double-speed mode
1/8
Ring oscillator mode
SQ
R
STP instruction
WIT _R
instruction
QS
R
Timing φ
(Internal clock)
STP instruction
Reset
Interrupt disable flag l
Interrupt request
Note:Ring oscillator is used only for starting.
Fig. 43 Block diagram of system clock generating circuit (for ceramic resonator)
34