Epson FX-870/1170 - Manual (Page 26)

Printer Features
BUSY
I
ACKNLG
D A T A . . . . . . . . . . . . . . . .
STROBE
Signal Return
Pin Pin Signal
No. No. Name Dir. Description
1 19 S T R O B E I n STROBE pulse to read data in. Pulse
width must be more than 0.5 us at
receiving terminal.
2 20 DATA 1 In These signals represent the 1st to 8th
3 21 DATA2 In bits of parallel data, respectively. Each
4 22 DATA3 In signal is HIGH when data is a logical 1
5 23 DATA4 In and LOW when a logical 0.
6 24 DATA5 In
7 25 DATA6 In
8 26 DATA7 In
9 27 DATA8 In
10 28 ACKNLG out Approx. 12 us pulse. LOW indicates that
data has been received and that the
printer is ready to accept more data.
11 29 BUSY out A HIGH signal indicates that the printer
cannot receive more data. The signal
becomes HIGH in the following cases:
1. During data entry
2. During input buffer full
3. During printer error status
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