Specifications, Parallel interfacing – Panasonic KX-P3626 User Manual
Page 62
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Parallel Interfacing
A method of transferring data from a computer to a printer through a parallel interface based on the
Centronics standard.
Specifications:
• data transfer speed: 1000 cps minimum
• synchronization: external STROBE pulse
• logic levels: TTL (Transistor-Transistor-Logic) levels
• handshaking: BUSY and ACK signals
• connector type: 57-30360 (AMPHENOL) or equivalent
• cable: use a shielded cable (6"571.95 meters) or less in length.
When the printer is processing data, the BUSY signal is high. The printer will not accept new data from
the computer. After the processing is completed, the BUSY signal goes low. (The BUSY signal is also
high when the printer is OFF LINE). When the busy signal occurs, the ACK signal goes low indicating
to the computer that the data has been processed and the printer is ready to accept more data. This
handshaking routine occurs each time a character is sent to the printer.
BUSY
SLOT
PO
ERROR
ON LINE
LOVy
HIGH
LOW
HIGH
OFF LINE
HIGH
LOW
LOW
LOW
PAPER OUT
HIGH
LOW
HIGH
LOW
Printer status signals
18
1
oooooooooooooooooo
oooooooooooooooooo
l
36
19,
Parallel interface connector (printer side)
Signal
pin
Return
side
pin
Signal
Direc
tion
1
19
STB
2
20
D A T A I
3
2 1
DATA 2
4
22
D A T A 3
Input
5
23
DATA 4
6
24
D A T A S
7
2 5
DATA 6
8
26
DATA 7
9
27
DATA 8
10
28
ACK
11
29
BUSY
Output
12
PO
Singal
pin
Return
side
pin
Signal
Direc
tion
13
SLOT
Output
14
AUTO FEED XT
Input
15
16
SG
17
FG
18
+5V
Output
31
30
PRIME
Input
32
ERROR
Output
33
SG
34
35
36
SLCT IN
Input
Pin configuration (Parallel)
62