Fungsi pin konektor DB-25 adalah sebagai berikut :
| Pin |
In / Out |
Nama Sinyal |
Register |
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| 1 |
Out |
nSTROBE |
C0 |
| 2 |
Out |
Data 0 |
D0 |
| 3 |
Out |
Data 1 |
D1 |
| 4 |
Out |
Data 2 |
D2 |
| 5 |
Out |
Data 3 |
D3 |
| 6 |
Out |
Data 4 |
D4 |
| 7 |
Out |
Data 5 |
D5 |
| 8 |
Out |
Data 6 |
D6 |
| 9 |
Out |
Data 7 |
D7 |
| 10 |
In |
nACK |
S 6 + |
| 11 |
In |
Busy |
S 7 - |
| 12 |
In |
PaperEnd |
S 5 + |
| 13 |
In |
Select |
S 4 + |
| 14 |
Out |
nAutoFeed |
C 1 - |
| 15 |
In |
nError |
S 3 + |
| 16 |
Out |
nInit |
C 2 + |
| 17 |
Out |
nSelectIn |
C 3 - |
| 18 - 25 |
<- -> |
Ground |
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