1.3.2 Interface Specifications
This printerprovides a bidirectional8-bit parallel interfaceand a TypeB optionalinterface slot, standard.
1.3.2.1 Parallel Interface (Forward Channel)
Transmission mode 8-bit parallel,IEEE-P1284, compatibility mode
Adaptable connector 57-30360 (Amphenol) or equivalent
Synchronization STROBE pulse
Handshaking BUSY and ACKNLG signals
Signallev el TTL compatible (IEEE-P1284 level 1device)
Table 1-31 Pin Assignments for Forward Channel
Pin
No. Signal
Name Return
GND pin In /Out Function Description
1STROBE 19 In Strobe pulse. Input data is latched at falling edge ofthe signal
2 DATA1 20 In Parallelinput data to the printer bit 0: LSB
3 DATA2 21 In bit 1
4 DATA3 22 In bit 2
5 DATA4 23 In bit 3
6 DATA5 24 In bit 4
7 DATA6 25 In bit 5
8 DATA7 26 In bit 6
9 DATA8 27 In bit 7: MSB
10 ACKNLG 28 Out This signal (negative pulse)indicates the printer has received
data and is readyto accept more data.
11 BUSY 29 Out This signal’s HIGH level means the printeris not ready to
accept data.
12 PE 28 Out This signal’s HIGHlevel means the printer has a paper-out
error.
13 SLCT 28 Out Always HIGH whenthe printer is powered on.
14 AFXT 30 In Not used.
31 INIT 30 In This signal’s negative pulse initializes printer.
32 ERROR 29 Out This signal’s LOW level means the printer is in anerror state.
36 SLIN 30 In Not used.
18 Logic H —— Out This line ispulled up to + 5 V through 3.3KΩresistor.
35 +5V —— Out This line ispulled up to +5 V through 3.3KΩresistor.
17 Chassis —— —— Chassis GND.
16, 33,
19-30 GND —— —— Signal GND.
15, 34 NC —— —— Not connected.
FX-2170 Service Manual Product Description
Rev.A 1-21