M306V5EESP Mitsubishi, M306V5EESP Datasheet - Page 155

• Manufacturer Part Number: M306V5EESP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
• Manufacturer: Mitsubishi

Rev. 1.0
2.14 Data Slicer
Figure 2.14.1 Data slicer block diagram
This microcomputer includes the data slicer function for the closed caption decoder (referred to as the
CCD). This function takes out the caption data superimposed in the vertical blanking interval of a composite
video signal. A composite video signal which makes the sync chip’s polarity negative is input to the CV
pin.
When the data slicer function is not used, the data slicer circuit and the timing signal generating circuit can
be cut off by setting bit 0 of the data slicer control register 1 (address 0260
realize the low-power dissipation.
Note: When using the data slicer, set bit 7 of the peripheral mode register (address 027D
the main clock frequency.
Composite
video
signal
Note : Make the length of wiring which is connected
to V
possible so that a leakage current may not
be generated when mounting a resistor or a
capacitor on each pin.
External circuit
HOLD
, HLF, and CV
1000 pF
V
HOLD
Data bus
Reference
voltage
generating
circuit
IN
pin as short as
Low-pass
filter
1 M
Caption data register 1
(addresses 0263
Caption data register 2
(addresses 0265
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
0.1 F
470
Comparator
Clamping
circuit
16
16
CV
, 0262
, 0264
Sync slice
circuit
+
–
IN
560 pF
16
16
)
)
H
1 F
SYNC
Synchronizing
separation
circuit
16-bit shift register
Synchronizing
signal counter
Start bit detecting
circuit
Data clock
generating circuit
Data slice line
specification
circuit
200 pF
1 k
Timing signal
generating
circuit
Clock run-in
determination
circuit
HLF
and ON-SCREEN DISPLAY CONTROLLER
Interrupt request
generating circuit
MITSUBISHI MICROCOMPUTERS
16
Data clock position register
(address 026A
M306V5ME-XXXSP
Data slicer control register 2
(address 0261
Data slicer control register 1
(address 0260
) to “0.” These settings can
Caption position register
(address 0266
Clock run-in detect
register
(address 0269
Data slicer ON/OFF
Data slicer
interrupt
request
M306V5EESP
16
16
16
)
)
)
16
16
16
)
)
) according to
IN
155