Interface Connector Pin Assignments - Epson TM U200D - B/W Dot-matrix Printer Technical Manual

Interface Connector Pin Assignments

TM-U200PD printer status and signals
Pin number Source
1 Host
2 Host/Ptr
3 Host/Ptr
4 Host/Ptr
5 Host/Ptr
6 Host/Ptr
7 Host/Ptr
8 Host/Ptr
9 Host/Ptr
10 Printer
11 Printer
12 printer
13 Printer
14 Hostr
15
16
17
18 Printer
19-30
31 Host
32 Printer
33
34 Printer
35 Printer
36 Host
NOTES:
A prefix "n" to signal names refers to "L" active signals. To the host provided with none of the signal lines listed
above, both-way communication fails.
For interfacing, signal lines shall use twisted pair cables with the return sides connected to signal ground level.
Interfacing conditions shall be all based on the TTL level to meet the characteristics described below. In addition,
both rise time and fall time of each signal shall be 0.5Js or less.
Data transmission shall not ignore the signal nAck or Busy. An attempt to transmit data with either signal, nAck or
Busy, ignored can cause lost data. (Data transmissions to the printer shall be made after verifying the nAck signal
or while the Busy signal is at the "L" level.)
Interface cables shall be as minimum required short in length as possible.
NC: No Connect
ND: No Defined
1-20 Features and General Specifications
Compatibility Mode
nStrobe HostClk
Data0(LSB) Data0(LSB)
Data1 Data1
Data2 Data2
Data3 Data3
Data4 Data4
Data5 Data5
Data6 Data6
Data7(MSB) Data7(MSB)
nAck PtrClk
Busy PtrBusy/Data3,7
AckDataReq/
PError
Data2,6
Select Xflag/Data1,5
nAutoFd HostBusy
NC ND
GND GND
FG FG
Logic-H Logic-H
GND GND
nInit nInit
nFault nDataAvail/Data0,4
GND ND
DK_STATUS ND
+5V ND
nSelectIn 1284-Active
Nibble Mode Byte Mode
HostClk
Data0(LSB)
Data1
Data2
Data3
Data4
Data5
Data6
Data7(MSB)
PtrClk
PtrBusy
AckDataReq
Xflag
HostBusy
ND
GND
FG
Logic-H
GND
nInit
nDataAvail
ND
ND
ND
1284-Active
Rev.B