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21
Pin No.
Return
pin No.
Signal
From/To
Function
119
HostClk
PC/DP
High
Unknown
Sends data in “Low” when HostBusy is “Low”. After HostBusy
turns “High”, this signal becomes “High”.
High: DP is on BUSY status.
Low: DP can send data.
Earth
PeripheralLogicHigh
Clears sending data to this unit. (Low) Incoming pulse width
should be 100µs minimum.
Data1(LSB), Data5
Unused
Becomes “High” when DP requests each mode of IEEE1284.
PC/DP
PC/DP
PC/DP
PC/DP
PC/DP
PC/DP
PC/DP
PC/DP
PC/DP
2 - 9 20 - 27 Unknown
10
28
PrtClk
11 29
PtrBusy
12
Xflag
13
14
16•17
18
Earth
19 - 30
31
32
15•
33 - 35
36
HostBusy
GND
High
Init
GND
DataAvail
NC
1284 Active
16
Data4, Data8(MSB)
AckDataReq Data3, Data7
Data2, Data6
• Parallel input connector port
Signal allocation (Signal : Nibble)