Figure 1-6. Data Transmission Timing; Table 1-13. Connector Pin Assignments And Signal Functions - Epson FX-870 Service Manual

Printer Features
BUSY
ACKNLG
D A T A p
STROBE
Signal Return
Pin Pin Signal
No. No. Name
1 19 S T R O B E I n
2 DATA
20
3 21 DATA2
4 22 DATA3
5 23 DATA4
6 24 DATA5
7
25 DATA6
8 26 DATA7
9 27 DATA8
10 28 ACKNLG
11 BUSY
29
1-14
I
Dir.
STROBE pulse to read data in. Pulse
width must be more than 0.5 us at
receiving terminal.
1 In These signals represent the 1st to 8th
In bits of parallel data, respectively. Each
In signal is HIGH when data is a logical 1
In and LOW when a logical 0.
In
In
In
In
out Approx. 12 us pulse. LOW indicates that
data has been received and that the
printer is ready to accept more data.
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
. . . . . . . . . . . . . . . . -.-
Description
Epson FX-870/1170