Xerox 4215 Installation Planning Manual page 52

Parallel interface timing diagram
XEROX 4219/MRP AND 4215/MRP INSTALLATION PLANNING GUIDE
Figure B-4 illustrates the parallel interface timing. Refer to Table
B-2 for timing requirements.
Figure B-4. Parallel interface timing diagram
Table B-2. Timing requirements
Parameter
1 Data Setup Time before STROBE* True
2 Data Hold Time after STROBE False
3 STROBE* True pulse width
4 STROBE* True to BUSY True
5 BUSY True duration when receiving data
6 ACKNOWLEDGE* False to BUSY False
7 ACKNOWLEDGE* True pulse width
8 BUSY False to start of next cycle
9 BUSY True before:
ERROR* set True
SELECT set False
PAPER ERROR set True
10 ACKNOWLEDGE True after:
ERROR set False
SELECT set True
PAPER ERROR set False
* Signal is active low
INTERFACE SUPPORT
Value
Min Max
1.0 µs
1.0 µs
1.0 µs 500 µs
0 1.5 µs
2.6 µs 5.1 µs
0 10 µs
2.5 µs 5.0 µs
0
1.0 µs
1.0 µs
B-5