Centronics 306 Technical Manual page 213

Data Input Causing Busy
The diagram in Figure B-2 shows the interface timing involved in
transferring any data which causes a busy condition in the printer.
DATA
-l1.0J,lSL --!1.o/-lsL
=-=-=-=----:::-==_::_=_::
I
(M IN)
I . I
(M IN)
I -
DATA STROBE
I 11--------------------
-l 1-1.0
J,lS (MIN)
I
I
500
J,lS
(MAX)
BUSy ____________
t0M~~~~~~1
,
-I
BUSY DELAY
I . . . .
- - - - B U S Y - - - - - t . \
r~~~AY
ACKNOWLEDGE _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ....... ,
r
101/10IA/IOIS*
10lAL 102A 102AL
BUSY DELAY
0 0-1.5 usee 0
0-1. 5 usee
ACK DELAY 0 0-10.0 usee 0 0-10.0 usee
ACK 4 usee 2.5-5.0 usee 4 usee 2.5-5.0 usee
BUSY
Line Feed 75-105 msec . 75-105 msec 75-105 msec 16 msec (single
LF)
75-105 msec
(multiple LF)
Vertical Tab (I-inch) 300-310 msec 300-310 msec 300-310 msec 300-310 msec
Fonn Feed (II-inches) 3-3.5 sec 3-3.5 sec 3-3.5 sec 3-3.5 sec
De 1 ete 3 msec 100-400 usec 3 msec 100-400 usee
Bell 2 sec 0 2 sec 0
Se I ect 3 msec 100-400 usee" 3 msec 100-400 usec**
Deselect Untl1 printer Unt il pri nter Untl1 printer Until printer
is selected
is selected
is selected is selected
Pri nt Corrmand 6 msec/char 6 msec/char 470-500 msec 410-415 msec
plus 75-105 plus 75-105 (total)
(total)
msec LF msec LF
(Return time-no busy) (240 msec max)
(240 msec max) (0) (0)
*Vertical Tab and Form Feed durations for the lOIS apply to 6 line/inch operation.
**No busy if inhibit prime on select option is used.
301
306
0-1. 5 usee 0-1.5 usee
0-10.0 usee
0-10.0 usee
2.5-5.0 usee
2.5-5.0 usee
70-100 msec 75-105 msec
160-200 msec 300-310 msec
1.5-2.0 sec 3-3.5 sec
100-400 usee 100-400 usee
0 0
100-400 usee" 100-400 usec**
Until printer Untl1 pri nter
is selected is selected
6 msec/char
8.4 msec/char
plus 70-100
plus 75-105
msec LF msec LF
(270 msec max) (270 msec max)
Rev. E
Figure B-2.
BUSY CONDITION TIMING
B-2
I-ACK-j
500 SOl
0-1.5 usee 0-1. 5 usee
0-10.0 usee
0-10.0 usee
2.<;-5.0 usee 2.5-5.0 usee
75-105 mSlc 70-100 msec
300-310 ms~c 160-200 msec
3-3.5 sec 1.5-2.0 sec
100~400 usee 100-400 usee
0 0
100-400 usee" 100-400 usee"
Until printer Until pri nter
is selected is selected
8.4 msec/char 6 msec/char
plus 75-105 pI us 70-100
msec LF msec LF
(400 msec max) (400 msec max)