Epson TM-U950 Technical Manual page 35

CONFIDENTIAL
TM-U950P printer status and signals
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19 to 30
31
32
33
34
35
36
NC: Not connected, ND: Not defined
Notes:
A prefix "n" to signal names refers to low active signals.
If the host does not have any one of the signal lines listed above, two-way communication
fails.
For interfacing, signal lines should use twisted pair cables with the return sides connected to
the signal ground level.
1-24 Features and General Specifications
Source Compatibility mode
Host nStrobe
Host/Printer Data0 (LSB)
Host/Printer Data1
Host/Printer Data2
Host/Printer Data3
Host/Printer Data4
Host/Printer Data5
Host/Printer Data6
Host/Printer Data7 (MSB)
Printer nAck
Printer Busy
Printer PError
Printer Select
Host nAutoFd
NC
GND
FG
Printer Logic-H
GND
Host nInit
Printer nFault
GND
Printer DK_STATUS
Printer +5V
Host nSelectIn
Nibble mode Byte mode
HostClk HostClk
Data0 (LSB) Data0 (LSB)
Data1 Data1
Data2 Data2
Data3 Data3
Data4 Data4
Data5 Data5
Data6 Data6
Data7 (MSB) Data7 (MSB)
PtrClk PtrClk
PtrBusy/Data3, 7 PtrBusy
AckDataReq/
AckDataReq
Data2, 6
Xflag/Data1, 5 Xflag
HostBusy HostBusy
ND ND
GND GND
FG FG
Logic-H Logic-H
GND GND
nInit nInit
nDataAvail/Data0, 4 nDataAvail
ND ND
ND ND
ND ND
1284-Active 1284-Active
Rev. A