Signal Line And Pin Assignment; Parallel Port Status Signals When An Error Occurs - Citizen CL-S400DT Technical Manual

(2) Signal line and pin assignment

Pin No. Signal name
1 STROBE
2-9 DATA0-7
10 ACKNLG
11 BUSY
12 PERROR
13 SELECT
14 AUTOFD
15 NC
16 SGND
17 FGND
18 P.L.H
19-30 GND
31 PRIME
32 FAULT
33 GND
34 NC
35 FUSE
36 SELECTIN

(3) Parallel port status signals when an error occurs

The following table shows the status signal change when an error occurs.
Error
Paper end
Error other than paper end
• Head open
• Other
Conditions for Busy
I/O
Input Strobe signal to read in 8-bit data
Input 8-bit parallel signal
Output 8-bit data request signal
Output Signal specifying printer busy
Output Signal specifying media end
Output Signal specifying if the printer is on-line (printing enabled)
or off-line
Input Invalid (ignored)
--- Not used
--- Signal ground
--- Frame ground
Output Peripheral logic high (pulled up to +5V at 10KΩ)
--- Ground for twisted pair return
Input Printer reset
Output Signal specifying printer error
--- Signal ground
--- Not used
--- Not used
Input Invalid (ignored)
L → H
Busy:
L → H
PError:
H → L
Select:
H → L
Fault:
L → H
Busy:
L → unchanged
PError:
H → L
Select:
H → L
Fault:
• Receive buffer full
• Data being read
• Error
2-49
Chapter 2 Operating Principles
Function in Compatible Mode
Compatible mode
2-4. Interface
CL-S400DT