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M306V2EEFS датащи(PDF) 38 Page - Renesas Technology Corp

номер детали M306V2EEFS
подробное описание детали  SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
PDF  271 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M306V2EEFS датащи(HTML) 38 Page - Renesas Technology Corp

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Rev.1.40
Oct 06, 2004 page 38 of 269
M306V2ME-XXXFP, M306V2EEFP
2.5.3 Clock Control
Figure 2.5.4 shows the block diagram of the clock generating circuit.
Sub clock
CM04
fC32
CM0i : Bit i at address 000616
CM1i : Bit i at address 000716
WDCi : Bit i at address 000F16
XCIN
CM10 “1”
Write signal
1/32
XCOUT
Q
S
R
WAIT instruction
XOUT
Main clock
CM05
fC
CM02
f1
Q
S
R
Interrupt request
level judgment
output
RESET
Software reset
fC
CM07=0
CM07=1
fAD
Divider
a
d
1/2
1/2
1/2
1/2
CM06=0
CM17,CM16=00
CM06=0
CM17,CM16=01
CM06=0
CM17,CM16=10
CM06=1
CM06=0
CM17,CM16=11
d
a
Details of divider
XIN
f8
f32
c
b
b
1/2
c
f32SIO2
f8SIO2
f1SIO2
BCLK
Figure 2.5.4 Clock generating circuit
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).
Figure 2.5.3 OSD clock connection example
OSC2
OSC1
L
C1
C2
Microcomputer



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