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Interfaces7-2
Data Strobe - A high true pulse from the host to indicate that data is ready. The data strobe
must
remain high at least until the Data R
equest line goes false.
Data Lines - Eight standard or inverted levels from the host that specify character data, plot
data,
or a control code. Sensing Data Line 8 is controlled by printer configuration.
Paper Instruction (PI) - Optional standard or inverted level VFU signal from the host with
the
same timing and polarity as the data lines. PI line sensing is controlled by printer configura
Ć
tion.
NOTE: The PI Line must be disabled (configuration option selected from the front
panel) if the host computer does not drive or control the PI Line. If the line is not conĆ
trolled
by the host and sensing is enabled, rapid paper slewing will occur
.
Interface Verification - Two pins on the interface connector jumpered together allow you to
verify
proper installation of the interface connector.
NOTE
: The +5 volt test is only connectable with a jumper
.
Table 7-1. Connector Pin Assignments for
Dataproducts Interface with AMP Connector
SIGNAL PIN SIGNAL PIN
Data Line 1
Data Line 2
Data Line 3
Data Line 4
Data Line 5
Data Line 6
Data Line 7
Data Line 8
Paper Instr.
Data Strobe
Return
Return
Return
Return
Return
Return
Return
Return
Return
Return
Ready
On Line
I/F Verif.
Return
Data Request
19
3
20
4
1
2
41
40
34
18
43
42
36
35
28
44
30
14
38
37
22
6
21
23
45, 46
Return 5
Return 7
OUTPUT INPUT
Return 39
Pins not listed are not connected.