RD-EK32 Series User Development manual
6
2.2 Parallel Interface
The RD-EK system thermal parallel interface printer uses 26P double-row needle socket
as the
communication interface, and the spacing between the needles is
2.54mm
.
Figure 3-3 is the parallel
interface figure.
2.2.1 Data interface
26Cores
double line
Signal Direction
illustration
PC DB25 Parallel
port
1
STB/
IN
Strobe pulse to latch data, reading
occurs at falling edge.
1
3
DATA1
IN
8 data pins, the logic „0‟ indicates low, „1‟
indicates high
2
5
DATA2
IN
3
7
DATA3
IN
4
9
DATA4
IN
5
11
DATA5
IN
6
13
DATA6
IN
7
15
DATA7
IN
8
17
DATA8
IN
9
19
ACK/
Out
answer pulse, and "Low" level indicates
that the data has been accepted
10
21
BUSY
Out
"High" level indicates that the printer is
busy an
d can‟t receive data
11
23
PE
— —
Grounding (
PERROR
)
— —
25
SEL
Out
"High" level indicates that the printer is
On line
13
4
ERR/
Out
Printer error signal ,HIGH level signal
indicates that printer no error.
15
图
3-3
