
| Installing the  | 
Pin out – auxiliary DIO connector
The auxiliary digital connector can be accessed using a variety of cabling schemes. To bring the 
Table 2-4.  Auxiliary digital connector pin out
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 | NC | 1 | • • | 
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 | NC | 3 | • • | 
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 | FIRSTPORTB Bit 7 | 5 | • • | 
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 | FIRSTPORTB Bit 6 | 7 | • • | 
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 | FIRSTPORTB Bit 5 | 9 | • • | 
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 | FIRSTPORTB Bit 4 | 11 | • • | 
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 | FIRSTPORTB Bit 3 | 13 | • • | 
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 | FIRSTPORTB Bit 2 | 15 | • • | 
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 | FIRSTPORTB Bit 1 | 17 | • • | 
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 | FIRSTPORTB Bit 0 | 19 | • • | 
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 | DIG GND | 21 | • • | 
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 | NC | 23 | • • | 
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 | DIG GND | 25 | • • | 
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 | NC | 27 | • • | 
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 | DIG GND | 29 | • • | 
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 | NC | 31 | • • | 
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 | DIG GND | 33 | • • | 
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 | PC +5V | 35 | • • | 
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 | DIG GND | 37 | • • | 
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 | NC | 39 | • • | 
| 2 | 
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 | 1 | 
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2PC +5V
4 DIG GND
6 FIRSTPORTC Bit 7
8 FIRSTPORTC Bit 6
10 FIRSTPORTC Bit 5
12 FIRSTPORTC Bit 4
14 FIRSTPORTC Bit 3
16 FIRSTPORTC Bit 2
18 FIRSTPORTC Bit 1
20 FIRSTPORTC Bit 0
22 FIRSTPORTA Bit 7
24 FIRSTPORTA Bit 6
26 FIRSTPORTA Bit 5
28 FIRSTPORTA Bit 4
30 FIRSTPORTA Bit 3
32 FIRSTPORTA Bit 2
34 FIRSTPORTA Bit 1
36 FIRSTPORTA Bit 0
38 NC
40 NC
| The red stripe | 
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| identifies pin # 1 | 2 | 1 | 
4039
39
| IDC Connector | IDC Connector | 
Figure 2-3.  C40FF-x  cable
| 2 | 
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 | 1 | The red stripe | 1 | 
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 | identifies pin # 1 | 
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| 40 | 
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 | 39 | 19 | 
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20
37
| IDC Connector | Dsub Connector |