FUJITSU DL6600Pro - Manual (Page 177)

Parallel Interface
C-2 User’s Manual
Table C–1 Parallel interface signals
Pin
number Return
pin
number Signal
Compatible mode
Nibble mode
Direction Description
1 19 Data Strobe
(DSTB) Input • Strobe pulse for reading data (Data 1
to Data 8). The printer reads data
when this signals is low.
• The pulse width must be 1 µs or more
at the printer’s receiving terminal.
Host Clock This signal is set high when the host
requests the reverse data transfer phase
(nibble mode).
2
3
4
5
6
7
8
9 20
21
22
23
24
25
26
27 Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7
Data 8 Input
Input
Input
Input
Input
Input
Input
Input • Data 1 to 8 signals correspond to
parallel data bits 1 to 8.
• Data 8 is the most significant bit, but
is not used in the 7-bit ASCII mode.
• All signals must go high at least 1 µs
before the falling edge of the Data
Strobe signal, and must stay high for at
least 1 µs after the rising edge.
10 28 Acknowledge
(ACK) Output • Pulse signal indicating data receiption
completed (or data reception enabled)
status
• Issued when the printer switches from
offline to online
Printer Clock Reverse data transfer phase:
This signal goes high when data being
sent to the host is established.
Reverse idle phase:
This signal is set low then goes high to
interrupt the host, indicating that data is
available.
DL6400/6600 Book Page 2 Thursday, September 21, 2000 7:52 PM