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| pin number | purpose
| 1
| mode bit 0
| 2
| ground
| 3
| mode bit 1
| 4
| ground
| 5
| mode bit 2
| 6
| ground
| 7
| mode bit 3
| 8
| ground
| 9
| mode bit 4
| 10
| ground
| 11
| mode bit 5
| 12
| ground
| 13
| level 1 accept
| 14
| ground
| 15
| 9.5MHz clock
| 16
| ground
| 17
| 38 MHz clock (4X clock)
| 18
| ground
| 19
| ground
| 20
| ground
| |