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(9) Connector Pin Diagram (IEEE1284-B Connector):
Pin Signal Name
No. Compatibility Mode Nibble mode ECP mode
1
nStrobe HostClk HostClk
2
Data 1 Data 1 Data 1
3
Data 2 Data 2 Data 2
4
Data 3 Data 3 Data 3
5
Data 4 Data 4 Data 4
6
Data 5 Data 5 Data 5
7
Data 6 Data 6 Data 6
8
Data 7 Data 7 Data 7
9
Data 8 Data 8 Data 8
10
nAck PtrClk PeriphClk
11
Busy PtrBusy PeriphAck
12
PError AckDataReq nAckReverse
13
Select Xflag XFlag
14
nAutoFd HostBusy HostAck
15
NC NC NC
16
0V 0V 0V
17
CHASSIS GND CHASSIS GND CHASSIS GND
18
+5V (for detection) +5V (for detection) +5V (for detection)
19
TWISTED PAIR GND (PIN1) TWISTED PAIR GND (PIN1) TWISTED PAIR GND (PIN1)
20
TWISTED PAIR GND (PIN2) TWISTED PAIR GND (PIN2) TWISTED PAIR GND (PIN2)
21
TWISTED PAIR GND (PIN3) TWISTED PAIR GND (PIN3) TWISTED PAIR GND (PIN3)
22
TWISTED PAIR GND (PIN4) TWISTED PAIR GND (PIN4) TWISTED PAIR GND (PIN4)
23
TWISTED PAIR GND (PIN5) TWISTED PAIR GND (PIN5) TWISTED PAIR GND (PIN5)
24
TWISTED PAIR GND (PIN6) TWISTED PAIR GND (PIN6) TWISTED PAIR GND (PIN6)
25
TWISTED PAIR GND (PIN7) TWISTED PAIR GND (PIN7) TWISTED PAIR GND (PIN7)
26
TWISTED PAIR GND (PIN8) TWISTED PAIR GND (PIN8) TWISTED PAIR GND (PIN8)
27
TWISTED PAIR GND (PIN9) TWISTED PAIR GND (PIN9) TWISTED PAIR GND (PIN9)
28
TWISTED PAIR GND (PIN10) TWISTED PAIR GND (PIN10) TWISTED PAIR GND (PIN10)
29
TWISTED PAIR GND (PIN11) TWISTED PAIR GND (PIN11) TWISTED PAIR GND (PIN11)
30
TWISTED PAIR GND (PIN31) TWISTED PAIR GND (PIN31) TWISTED PAIR GND (PIN31)
31
nInit nInit nReverseRequest
32
nFault nDataAvail nPeriphRequest
33
0V 0V 0V
34
NC NC NC
35
NC NC NC
36
nSelectIn IEEE1284Active IEEE1284Active
NOTE: The signal name starting with a lower case “n” indicates that it is a low active signal.
18 1
36
19