Parallel Interface (J10: Computer Printer Board) - Sharp AR-P13 Service Manual

1.1 Parallel Interface (J10: Computer
Pin No.
Compatible
1 nStrobe
2 Signal Ground (nStrobe)
3 Data 1 (LSB)
4 Signal Ground (Data 1)
5 Data 2
6 Signal Ground (Data 2)
7 Data3
8 Signal Ground (Data 3)
9 Data 4
10 Signal Ground (Data 4)
11 Data 5
12 Signal Ground (Data 5)
13 Data 6
14 Signal Ground (Data 6)
15 Data 7
16 Signal Ground (Data 7)
17 Data 8
18 Signal Ground (Data 8)
19 nAck
20 Signal Ground (nAck)
21 Busy
22 Signal Ground (Busy)
23 PError
24 Signal Ground (Paper)
25 Select
26 nInit
Signal Name
Nibble ECP
HostClk HostClk
PtrClk PeriphClk
PtrBusy PeriphAck
AckDataReq nAckReverse
Xflag Xflag
nInit nReverse
Request
↔ ↔ ↔ ↔ ↔
Printer Board)
Direction
C → P
Data Strobe signal (Compatible)
Host clock signal (Nibble)
Host clock signal (ECP)
- Data 1 to 8
C ↔ P
Parallel data signal (Compatible)
- Not used (Nibble)
C ↔ P
Parallel data signal (ECP)
-
C ↔ P
-
C ↔ P
-
C ↔ P
-
C ↔ P
-
C ↔ P
-
C ↔ P
-
C ← P
Acknowledge signal (Compatible)
Peripheral clock signal (Nibble)
Peripheral clock signal (ECP)
C ← P
Busy signal (Compatible)
Busy-Data bit 1-Data bit 5 (Nibble)
Acknowledge/Commnad signal (ECP)
-
C ← P
Paper error signal (Compatible)
Data request-Data bit 2-Data bit 6 (Nibble)
Reverse transfer acknowledge signal (ECP)
-
C ← P
Online signal (Compatible)
Data bit 1-Data bit 5 (Nibble)
ECP mode signal (ECP)
C → P
Initialize signal (Compatible)
Always high (Nibble)
Reverse transfer request signal (ECP)
5-2
Note