General Description
Laser 1000/1500 Service Manual
1.3 INTERFACE SPECIFICATIONS
and
1500 are equipped with the following external interfaces:
parallel interface
❑
interface
■
Optional Type B interface (except for
The
1000 is equipped with the following external interfaces:
❑
1.3.1
Type:
parallel interface
Optional Type B host interface (including
Parallel Interface
System:
STROBE synchronization, 8-bit parallel data transfer
Handshaking:
BUSY and ACKNOWLEDGE signals
Note:
While the
setting for BUSY delay is “MlN,” the handshaking signal is BUSY
only.
Comector type:
receptacle
Applicable plug:
57-30360
or equivalent)
Transfer speed:
About
75,000
bytes/second (max.)
About 125,000 bytes/second (max.)
1500)
timing:
See Figure 1-3.
Signal description:
See Table 1-12.
(2)
‘r
DATA 1-8
VALID
,
,
STOROBE
/
(4)
—
(7)
BUSY
\
(6)
Figure 1-3. Signal Timing
Table 1-12. Signal Timing
No.
Description
Time
Data set up
0.5 (min.)
(2)
DATA hold
0.5 (min.)
(3)
STROBE (pulse width)
0.5 (min.)
(4)
BUSY delay
4.0 (max.)
to BUSY –5
o
o
5
(5)
+5
10
No
pulse
—
(6)
pulse width
10
(7)
to STROBE
O (min.)
1-14
Rev.
