A Appendixes
564 Keysight U8903B User’s Guide
Appendix 19: DSI Input and Output Interface
The DSI input and output interface uses the 25-pin female D-SUB connector. The pins
assignment for the connector are shown in Figure A-2 and Table A-46.
Figure A-2 25-pin female D-SUB connector
12345678910111213
14 15 16 17 18 19 20 21 22 23 24 25
Table A-46 25-pin female D-SUB connector pins assignment
Pin no. Label Direction Description
1 Master Clk Out Out Master clock out for digital audio
2 GND – Digital ground
3 DSI Gen Data-Out Out Digital generator DSI data output
4 DSI Gen FS-InOut In/Out DSI generator DSI frame sync
5 DSI Gen CLK-InOut In/Out DSI generator DSI bit clock
6– – Unused
7 +5.0 V – +5.0 V supply with over-current protection
8 +3.3 V – +3.3 V supply with over-current protection
9 DSI Ana Data-In In Digital analyzer DSI data input
10 DSI Ana FS-InOut In/Out Digital analyzer DSI frame sync
11 DSI Ana Clk-InOut In/Out Digital analyzer DSI bit clock
12 GND – Digital ground
13 Sync Clock Out Out Sync clock output for AES3/SPDIF and DSI
14 – 25 GND – Digital ground
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