
Digital input/output connector and pin out
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 | Table 23. Digital I/O connector specifications | |||
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| Connector type | 
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| Connector compatibility | 
 | Translates to standard  | |||
| Compatible cable | 
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| Compatible accessory products | 
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 | Table 24. Digital I/O connector pin out | |||
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| Pin | Signal name | 
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 | Pin | Signal name | 
| 1 | NC | 
 | 2 | PC +5 V | |
| 3 | NC | 
 | 4 | DIG GND | |
| 5 | FIRSTPORTB Bit 7 | 
 | 6 | FIRSTPORTC Bit 7 | |
| 7 | FIRSTPORTB Bit 6 | 
 | 8 | FIRSTPORTC Bit 6 | |
| 9 | FIRSTPORTB Bit 5 | 
 | 10 | FIRSTPORTC Bit 5 | |
| 11 | FIRSTPORTB Bit 4 | 
 | 12 | FIRSTPORTC Bit 4 | |
| 13 | FIRSTPORTB Bit 3 | 
 | 14 | FIRSTPORTC Bit 3 | |
| 15 | FIRSTPORTB Bit 2 | 
 | 16 | FIRSTPORTC Bit 2 | |
| 17 | FIRSTPORTB Bit 1 | 
 | 18 | FIRSTPORTC Bit 1 | |
| 19 | FIRSTPORTB Bit 0 | 
 | 20 | FIRSTPORTC Bit 0 | |
| 21 | DIG GND | 
 | 22 | FIRSTPORTA Bit 7 | |
| 23 | NC | 
 | 24 | FIRSTPORTA Bit 6 | |
| 25 | DIG GND | 
 | 26 | FIRSTPORTA Bit 5 | |
| 27 | NC | 
 | 28 | FIRSTPORTA Bit 4 | |
| 29 | DIG GND | 
 | 30 | FIRSTPORTA Bit 3 | |
| 31 | NC | 
 | 32 | FIRSTPORTA Bit 2 | |
| 33 | DIG GND | 
 | 34 | FIRSTPORTA Bit 1 | |
| 35 | PC +5 V | 
 | 36 | FIRSTPORTA Bit 0 | |
| 37 | DIG GND | 
 | 38 | NC | |
| 39 | NC | 
 | 40 | NC | |