Interface Connector Pin Assignments
IEEE 1284 interface connector pin assignments and functions
NOTES:
❏
❏
❏
❏
❏
❏
Overscored signal names are LOW active signals.
If a host does not provide for the signal lines listed above, two-way communication fails.
For interfacing, signal lines must use twisted pair cables with the return sides connected to signal
ground level.
Interfacing conditions must all be based on the TTL level to meet the characteristics described below.
In addition, both the rise and fall time of each signal must be 0.5
µ
s or less.
Data transmission must not ignore the ACK or BUSY signal. An attempt to transmit data with either
the ACK or BUSY signal ignored can cause lost data. (Data transmissions to the printer must be made
after verifying the ACK signal or while the BUSY signal is at a LOW level.)
Interface cables should be as short in length as possible.
NC: Not Connected
ND: Not Defined
— 17 —
Pin number Source Compatibility Mode
Nibble Mode
Byte Mode
1
Host
Strobe
Host Clk
Host Clk
2
Host/Ptr
Data0 (LSB)
Data0 (LSB)
Data0 (LSB)
3
Host/Ptr
Data1
Data1
Data1
4
Host/Ptr
Data2
Data2
Data2
5
Host/Ptr
Data3
Data3
Data3
6
Host/Ptr
Data4
Data4
Data4
7
Host/Ptr
Data5
Data5
Data5
8
Host/Ptr
Data6
Data6
Data6
9
Host/Ptr
Data7 (MSB)
Data7 (MSB)
Data7 (MSB)
10
Printer
Ack
PtrClk
PtrClk
11
Printer
Busy
PtrBusy/Data3,7
PtrBusy
12
Printer
PError
AckDataReq/
Data2,6
AckDataReq
13
Printer
Select
Xflag/Data1,5
Xflag
14
Hostr
AutoFd
HostBusy
HostBusy
15
NC
ND
ND
16
GND
GND
GND
17
FG
FG
FG
18
Printer
Logic-H
Logic-H
Logic-H
19-30
GND
GND
GND
31
Host
Init
Init
Init
32
Printer
Fault
DataAvail /Data0, 4
DataAvail
33
GND
ND
ND
34
Printer
DK_STATUS
ND
ND
35
Printer
+5V
ND
ND
36
Host
SelectIn
1284-Active
1284-Active
Summary of Contents for UP-250
Page 1: ...EXTERNAL PRINTER FEB 2000 MODEL UP 250 without price TECHNICAL MANUAL ...
Page 95: ... 86 END END Yes No Action 4 Replace main PCB Replace printer OK Action 4 mechanism assembly ...
Page 136: ... 127 ...
Page 149: ... 140 Main Circuit Board Parts Layout ...
Page 150: ... 141 RS 232 Serial Interface Circuit Board Parts Layout ...
Page 151: ... 142 IEEE 1284 Parallel Interface Circuit Board Parts Layout ...
Page 152: ...RS 485 Serial Interface Circuit Board Parts Layout 143 ...
Page 160: ... 151 Case Unit Lubrication Points Diagram 4 G 31 4 G 31 3 G 31 3 G 31 ...
Page 163: ... 154 EXPLODED DIAGRAM FOR TM U200B U210B NO 1 ...
Page 164: ... 155 EXPLODED DIAGRAM FOR TM U200B U200PB U210B U210PB NO 2 ...