Filter
Top Products
Parallel Interface
C-4 User’s Manual
14 — Auto Feed XT Input Not used
Host Busy Reverse data transfer phase:
This signal is set low when the host can
receive data, and goes high when the
host has received data. Following a
reverse data transfer, the interface enters
the reverse idle phase when the Host
Busy signal goes low and the printer has
no data.
Reverse idle phase:
This signal goes high when the Printer
Clock signal goes low so that the
interface re-enters the reverse data
transfer phase. If it goes high with the
1284 Active signal low, the idle phase is
aborted and the interface returns to the
compatibility mode.
15 —— — No connection
16 — Signal Ground
(SG)
— Logic ground level (0 V)
17 — Frame Ground
(FG)
— Printer chassis ground line. FG and SG
are connected.
18 — +5V Output +5V source (up to 300 mA)
19–30 — Signal Ground
(SG)
— Twisted-pair return lines
31 — I
nput Prime
(INPRM)
Input If this signal is low for more than 50 µs,
the printer is reset to initial status and
placed online.
Table C–1 Parallel interface signals (Continued)
Pin
number
Return
pin
number
Signal
Compatible mode
Nibble mode
Direction Description
DL6400/6600 Book Page 4 Thursday, September 21, 2000 7:52 PM