21 interface signals, 21 interface, Signals -42 – SATO GT424 User Manual
Page 124
Section 5: Interface Specifications
Page 5-42 GT Series Operator’s Manual
5.20 IEEE 1284 INTERFACE (CONT’D)
Pin Assignment
With Centronics standards, each signal pin placement is as follows:
However, the IEEE 1284-B type connector is compliant when connecting the IEEE1284
standard.
5.21 INTERFACE SIGNALS
With Centronics standards, the content of each signal type is as follows. However, each signal
line used with IEEE1284 standards is compliant with IEEE1284 standards.
Pin no.
Signal Type
Content
Pin no.
Signal Type
Content
1 HOST
CLK
Input
19 SIGNAL
GROUND
2
DATA 1
Input
20
SIGNAL GROUND
3
DATA 2
Input
21
SIGNAL GROUND
4
DATA 3
Input
22
SIGNAL GROUND
5
DATA 4
Input
23
SIGNAL GROUND
6
DATA 5
Input
24
SIGNAL GROUND
7
DATA 6
Input
25
SIGNAL GROUND
8
DATA 7
Input
26
SIGNAL GROUND
9
DATA 8
Input
27
SIGNAL GROUND
10 PERIPH
CLK
Output
28 SIGNAL
GROUND
11 PERIPH
ACK
Output
29 SIGNAL
GROUND
12
nACK REVERSE
Output
30
SIGNAL GROUND
13 XFLAG
Output
31 NREVERSE REQUEST
Input
14 HOST
ACK
Input
32 nPERIPH
REQUEST
Output
15
33
16 LOGIC
GND
34
17 CHASSIS
GND
35
18
PERIPHERAL LOGIC HIGH
Input 36
1284ACTIVE
Input
Pin no.
Signal Type
Direction
Contents
1
HOST CLK
Input
A low active pulse is necessary in synchronized
signals for scanning Data 1 to Data 8.
2 to 9
DATA 1 to DATA 8
Input
When entering 8 bit parallel Data, Data 1 is the LSB
(least significant bit) and Data 8 is the MSB (most
significant bit)
10
PERIPH CLK
Output
This is the LOW active pulse signal that indicates the
completion of received data scanning.
11
PERIPH ACK
Output
HIGH active signal which indicates that the printer
cannot receive data.
12
nACK REVERSE
Output
HIGH active signal which indicates that the media has
run out.
13
XFLAG
Output
HIGH active signal which indicates that data can be
received.
14
HOST ACK
Input
Signal for when using the IEEE1284 standard.
17
CHASSIS GND
Connects to the Frame Ground
18 PERIPHERAL
LOGIC HIGH
Output
The +5V voltage on the printer side.
19 to 30 SIGNAL GROUND
Connects to the ground for each signal
31 nREVERSE
REQUEST
Input
LOW active signal that requests printer initialization.
32 nPERIPH
REQUEST
Output
LOW active pulse signal that indicates a printer error.
36
1284ACTIVE
Input
Signal for when using the IEEE1284 standard.