M306V5ME-XXXSP Datasheet, PDF (29/263 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V5ME-XXXSP
M306V5EESP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
2.5.2 OSD Oscillation Circuit
The OSD clock oscillation circuit can obtain simply a clock for OSD by connecting an LC oscillator or a
ceramic resonator (or a quartz-crystal oscillator) across the pins OSC1 and OSC2. Which of LC oscillator
or a ceramic resonator (or a quartz-crystal oscillator) is selected by setting bits 1 and 2 of the clock control
register (address 020516).
Microcomputer
OSC1 OSC2
L
C1
C2
Figure 2.5.2 OSD clock connection example
2.5.3 Clock Control
Figure 2.5.3 shows the block diagram of the main clock generating circuit.
RESET
Software reset
CM10 “1”
Write signal
SQ
R
Interrupt request
level judgment
output
SQ
WAIT instruction
R
CM0i : Bit i at address 000616
CM1i : Bit i at address 000716
WDCi : Bit i at address 000F16
Sub clock
XIN
XOUT
Main clock
CM02
f1
fAD
f8
f32
bc
a _Divider d
f1SIO2
f8SIO2
f32SIO2
BCLK
b
c
a
1/2
1/2
1/2
1/2
1/2
CM06=1
CM06=0
CM17,CM16=10
CM06=0
CM17,CM16=11
d
CM06=0
CM17,CM16=01
CM06=0
CM17,CM16=00
Details of divider
Figure 2.5.3 Clock generating circuit
28
Rev. 1.0