Interface Signal - SNBC BTP-M300 Service Manual

3.3.3 Interface signal

Pin Signal source
1 H
2 H
3 H
4 H
5 H
6 H
7 H
8 H
9 H
10 P
11 P
12 P
13 P
14 H
15
16
17
18 P
Caution:
H stands for host end, P stands for printer end.
Parallel interface signal adopting TTL level. Please make sure that both ascending and descending
time of the host end are less than 0.5μs when using the printer to print.
During data transmitting, the host end should not neglect the Busy signal, otherwise the printing data
will be lost.
The parallel interface signal cable should be as short as possible.
Signal
tSetup
tReady
tStb
tBusy
tHold
Time Request of Parallel Interface
Signal definition
nStrobe
Data 0 (Least Significant Bit)
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7 (Most Significant Bit)
Ack
Busy
PError
Select
nAutoLF
Not defined
Logic Gnd
Chassis Gnd
Peripheral Logic High
Parallel interface signal definition
Min. value (ns)
750
0
750
0
750
Pin
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
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BTP-M300 Service Manual
Max. value (ns)
-
-
-
500
-
Signal source Signal definition
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
Signal Ground
H
P nFault
Signal Ground
Not defined
Not defined
H nSelectIn
nInit