M30218 Datasheet, PDF (20/179 Pages) Mitsubishi Electric Semiconductor – M30218 Group

Clock Generating Circuit
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Clock Control
Figure WA-3 shows the block diagram of the clock generating circuit.
XCIN
CM04
XCOUT
RESET
Software reset
CM10 “1”
Write signal
SQ
R
Interrupt request
level judgment output
SQ
WAIT instruction
R
Sub clock
XIN
XOUT
Main clock
CM05
CM02
1/32 ^fC32
fC
f1
f1SIO2
fAD
f8SIO2
f8
f32
bc
a _Divider d ^CM07=0
fC
CM07=1
BCLK
b
c
a
1/2
1/2
1/2
1/2
1/2
CM0i : Bit i at address 000616
CM1i : Bit i at address 000716
WDCi : Bit i at address 000F16
CM06=1
CM06=0
CM17,CM16=10
CM06=0
CM17,CM16=01
CM06=0
CM17,CM16=00
CM06=0
CM17,CM16=11
d
Details of divider
Figure WA-3. Clock generating circuit
19