7
Multimedia ICs BU1425AK / BU1425AKV
Equivalent circuits
Pin No. Pin name Equivalent circuitI / O Function
2 ~ 8
10
GD (7: 0)
G data input pin for 24-bit RGB input
Y data input pin for 16-bit YUV input
11 ~ 14
17 ~ 20
BD (0: 7)
B data input pin for 24-bit RGB input
U, V data input pins for 16-bit YUV
input
Control pins used to select RGB (24-
bit), YUV (16-bit) or DAC Through as
the input mode.
16 CDGSWB
Switches the mode between Video-
CD (HIGH) and CD-G (LOW).
54 ~ 56
58 ~ 60
62.63
RD (0: 7)
R data input pin for 24-bit RGB input
1
57
64
15
ROSD
GOSD
BOSD
OSDSW
OSD data input pin when using the
OSD function.
When the OSDSW pin is HIGH, input
to the ROSD, GOSD, and BOSD pins
takes precedence over RGB, and the
data is converted.
23
24
IM0
IM1
22 NTB
Switches the mode between NTSC
(LOW) and PAL (HIGH).
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8
Multimedia ICs BU1425AK / BU1425AKV
Pin No. Pin name Equivalent circuitI / O Function
27 VSY I / O
Vertical synchronization signals (Vsync)
are input (when SLABEB = LOW) or
output (when SLABEB = HIGH) here.
35 VREF-C I
This is the reference voltage generator
circuit monitoring pin which deter-
mines the output amplitude (output cur-
rent for 1 LSB) of the DAC. A 0.01µF
capacitor should be attached between
this and pin 43 (AV
DD).
29 PIXCLK O
The internal processing clock is divid-
ed in half and output. Data is read at
the point at which the edge of this
clock changes. This can also be used
as the clock for the OSD IC.
32 INT I
This pin switches between interlace
(when HIGH) and non-interlace (when
LOW) modes. This pin is effective in
both the VIDEO-CD and CD-G
modes.
33
34
SLABEB
ADDH
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This pin switches between the Master
(when HIGH) and Slave (when LOW)
modes. It is effective in the non-
interlace mode, and it switches bet-
ween – 0.5 lines (when LOW) and + 0.5
lines (when HIGH) for the number of
lines in an interlace field.
28 HSY I / O
This is the horizontal synchronization
signal pin. Negative polarity Hsync
signals are input (when SLABEB =
LOW) or output (when SLABEB =
HIGH) here. This is also used as the
synchronization signal for fixing the
PIXCLK output phase.
37 COUT O
This is the chrominance output pin for
the S pin.
9
Multimedia ICs BU1425AK / BU1425AKV
Pin No. Pin name Equivalent circuitI / O Function
39 VOUT O
Composite output pin
45 YOUT O
Luminance output pin for the S pin
42 IR I
The output amplitude (output current
for 1 LSB) of the DAC is specified
using an external resistor, and this pin
controls the value of the current flow-
ing per bit.
48 YCOFF I
When there is HIGH input at the signal
input pin which switches to and from
the low power consumption mode, this
turns off the output from the YOUT
and COUT pins.
51
49
VCLK
Input pin for the reference clock in the
Video-CD mode
52 RSTB
Reset input pin which initializes the
system. The system is reset when
this goes LOW.
YFILON1B
YFILON2B
Selects the F characteristic of the
Y-FILTER.
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BU1425AKV

Mfr. #:
Manufacturer:
Description:
IC ENCODER NTSC/PAL DGTL VQFP64
Lifecycle:
New from this manufacturer.
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