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Wednesday, 24 August 2011

Table Name of the pin and pregister of Parallel Port connector DB 25

Table1. Table Name of the pin and register of Parallel Port connector DB 25 :
Name of the pin from parallel Port connector DB 25


No. Pin Signal Name Direction Register Complement?
1 Strobe Out Control bit 0 Yes
2 Data 0 In/Out Data bit 0 No
3 Data 1 In/Out Data bit 1 No
4 Data 2 In/Out Data bit 2 No
5 Data 3 In/Out Data bit 3 No
6 Data 4 In/Out Data bit 4 No
7 Data 5 In/Out Data bit 5 No
8 Data 6 In/Out Data bit 6 No
9 Data 7 In/Out Data bit 7 No
10 Ack In Status bit 6 No
11 Busy In Status bit 7 Yes
12 Paper Out/Paper End In Status bit 5 No
13 Select In Status bit 4 No
14 Auto-Linefeed Out Control bit 1 Yes
15 Error/Fault In Status bit 3 No
16 Initialize Out Control bit 2 No
17 Select-Printer/Select-in Out Control bit 3 Yes
18-25 Ground Gnd - -


The address for each register address in parallel port LPT is as follows:

Table 2. Table Name of the pin and pregister of Parallel Port connector DB 25 : Parallel Port register address

Register LPT1
data register(baseaddress + 0) $378
status register(baseaddress + 1) $379
control register(baseaddress + 2) $37A


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