Star SP298 SERIES User Manual page 138

135
Function for compatibility mode
Pin
Signal Name
No.
1 nStorobe
2-9 Data0-7
10 nAck
11 Busy
12 PError
13 Select
14 nAutoFd
15 N/C
16 GND
17 Flame GND
18 Logic High
19-30 GND
31 nInit
32 nFault
33 EXT GND
IN/OUT
Signals when data is ready to be read. Signal goes from HIGH to LOW
IN
(for at least 0.5 microsec.) when the data is available.
These signals provide the information of the first to eighth bits of
IN parallel data. Each signal is at HIGH level for a logical 1 and at a LOW
level for a logical 0.
OUT A 9 microsecond LOW pulse acknowledges receipt of the data.
When this signal goes to LOW, the printer is ready to accept data. When
the printer is in one of the conditions below, "HIGH" is set.
OUT 1. Data is being entered
2. Off line
3. Error condition
This signal indicates the status of the paper sensor.
[In Star mode]
This signal goes to HIGH when either the TOF or the BOF sensor
detects that there is no paper. The signal will go to LOW when both the
OUT
TOF and BOF sensor detect that there is paper installed.
[In the ESC/POS mode]
This signal outputs the status of the sensor selected using the <ESC>
"c3" command.
OUT This signal is HIGH when the printer is online.
IN Unused
Unused
Signal ground
Chassis ground, isolated from logic ground
3.9 kΩ pull-up
Twisted pair return the signal to ground level.
This becomes a reset signal when DIP switch 1 is set to ON. (See page 128
IN for details.) When this signal goes to LOW (for at least 0.5 microsec.), the
printer is reset to its power-on condition.
This signal is normally HIGH. This signal goes to LOW to signal that
OUT
the printer cannot print due to an error condition.
External ground
Function