Sony DPP-MS300 Marketing, Service Manual

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5-59
5-24. IC PIN FUNCTION DESCRIPTION
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DK-40 BOARD IC407 F432301PGF (A/D, D/A CONVERTER, MEMORY BUS CONTROL)
Pin No. Pin Name I/O Description
1 MDT15 I/O
Two-way data bus with the D-RAM (IC403) (upper 8 bit)
2 DGND —
Ground terminal (logic system)
3 DVCC —
Power supply terminal (+5V) (logic system)
4, 5 MAD11, MAD10 O
Address signal output terminal Not used (open)
6 to11 MAD9 to MAD4 O
Address signal output to the D-RAM (IC403)
12 DGND —
Ground terminal (logic system)
13 to16 MAD3 to MAD0 O
Address signal output to the D-RAM (IC403)
17
DGND —
Ground terminal (logic system)
18
DVCC —
Power supply terminal (+5V) (logic system)
19
SC O
Sub carrier output to the CXA1229AM (IC103)
20
SYCX O
Composite sync signal output to the CXA1229AM (IC103)
21
DVCC —
Power supply terminal (+5V) (logic system)
22
DGND —
Ground terminal (logic system)
23
AGND —
Ground terminal (D/A converter, analog system)
24
BIAS1 I/O
Bias control terminal of the D/A converter
25
COMP1 I/O
Comparator in/out terminal of the D/A converter
26 VREF1 I
Reference voltage (+3V) input terminal
Used for the D/A output level adjustment of luminance signal (Y signal)
27 IREF1 I/O
Reference current control terminal
28 AVCC —
Power supply terminal (+5V) (D/A converter, analog system)
29 Y OUT O
Analog Y signal output terminal (luminance signal output terminal)
30 AGND —
Ground terminal (D/A converter, analog system)
31 BIAS2 I/O
Bias control terminal of the D/A converter
32 COMP2 I/O
Comparator in/out terminal of the D/A converter
33 VREF2 I
Reference voltage (+3V) input terminal
Used for the D/A output level adjustment of chroma signal
34 IREF2 I/O
Reference current control terminal
35 AVCC —
Power supply terminal (+5V) (D/A converter, analog system)
36 U OUT O
Analog U signal output terminal (B-Y color difference signal output terminal)
37 AGND —
Ground terminal (D/A converter, analog system)
38 BIAS3 I/O
Bias control terminal of the D/A converter
39 COMP3 I/O
Comparator in/out terminal of the D/A converter
40 VREF3 I
Reference voltage (+3V) input terminal
Used for the D/A output level adjustment of chroma signal
41 IREF3 I/O
Reference current control terminal
42 AVCC —
Power supply terminal (+5V) (D/A converter, analog system)
43 V OUT O
Analog V signal output terminal (R-Y color difference signal output terminal)
44 DGND —
Ground terminal (logic, digital system)
45 TI CHK I
Test input terminal (normally: fixed at “L”)
46 LDX I
Test input terminal (normally: fixed at “L”)
47 RESV I
Reset signal input for the internal SG V “H”: reset Not used (fixed at “L”)
48 SYET O
Sync selection signal output at external reading Not used (open)
49 EXET O
Internal/external selection signal output terminal Not used (open)
50 CGEEX O
EE, WR/READ select signal output to the video input circuit (IC101, 102) and Y/C separator
(IC105)
51 RESX I
System reset signal input from the reset signal generator (IC501) “L”: reset
For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”