SATO GT424 manual Interface Signals, IEEE 1284 INTERFACE CONT’D, Pin Assignment

Section 5: Interface Specifications

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.

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

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		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		Output	The +5V voltage on the printer side.
	LOGIC HIGH
19 to 30	SIGNAL GROUND			Connects to the ground for each signal
31	nREVERSE		Input	LOW active signal that requests printer initialization.
	REQUEST
32	nPERIPH		Output	LOW active pulse signal that indicates a printer error.
	REQUEST
36	1284ACTIVE		Input	Signal for when using the IEEE1284 standard.

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