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<strong>STR</strong>-<strong>DB870</strong>/<strong>DB1070</strong><br />
• VIDEO BOARD IC307 MB90089F-G-238-BND (OSD DRIVER)<br />
Pin No. Pin Name I/O Description<br />
1 YIN I Y (luminance) signal input from the Y switch (IC752)<br />
2 CIN I C (color) signal input from the C switch (IC750)<br />
3 VIN I Composite video signal input from the video select (IC308)<br />
4 AVCC — Power supply terminal (+5V) (for analog)<br />
5 FSCO O Internal color burst phase display signal output terminal Not used (open)<br />
6 VBLK O Vertical blanking timing signal output terminal Not used (open)<br />
7 VCC — Power supply terminal (+5V)<br />
54<br />
8 EXS I<br />
External clock generator circuit for color burst<br />
(NTSC: 14.31818MHz, PAL: 17.734475MHz)<br />
9 XS O Clock signal output terminal for color burst Not used (open)<br />
10 HSYNC O Horizontal synchronizing signal output terminal (for test)<br />
11 VSYNC O Vertical synchronizing signal output terminal (for test)<br />
12 EXHSYN I External horizontal synchronizing signal input terminal Not used (open)<br />
13 EXVSYN I External vertical synchronizing signal input terminal Not used (open)<br />
14 VSS — Ground terminal<br />
15 EXD I Dot clock generator connecting terminal for display<br />
16 XD O Dot clock generator connecting terminal for display<br />
17 VOB O Blanking signal output terminal Not used (open)<br />
18 VOC2 O color signal output terminal Not used (open)<br />
19 VOC1 O color signal output terminal Not used (open)<br />
20 VOC0 O color signal output terminal Not used (open)<br />
21 TEST I Test signal input terminal “L”: test (normally: fixed at “H”)<br />
22 SCLK I Serial data transfer shift clock signal input terminal<br />
23 SIN I Serial data input terminal<br />
24 CS I Chip select signal input terminal “L”: active<br />
25 VOUT O Composite video signal output to the video buffer (IC305)<br />
26 COUT O C (color) signal output to the video buffer (IC305)<br />
27 YOUT O Y (luminance) signal output to the video buffer (IC305)<br />
28 AVSS — Ground terminal (for analog)
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