Common Connectors
http://www.motorola.com/computer/literature 4-7
4
Floppy/LED Connector (J3)
A 50-pin high-density connector (J3 on the MVME2700 base board)
supplies the interface between the base board and an optional external
floppy disk drive. In addition to the disk drive control signals, a set of 16
lines is available to drive an external LED array. The pin assignments are
listed in the following table.
Table 4-3. Floppy/LED Connector J3
1 +5VF +5VF 2
3 LEDDISP0 LEDDISP1 4
5 LEDDISP2 LEDDISP3 6
7 LEDDISP4 LEDDISP5 8
9 LEDDISP6 LEDDISP7 10
11 LEDDISP8 LEDDISP9 12
13 LEDDISP10 LEDDISP11 14
15 LEDDISP12 LEDDISP13 16
17 LEDDISP14 LEDDISP15 18
19 LEDBLNK F_DENSEL 20
21 GND F_MSEN0 22
23 GND F_INDEX
∗ 24
25 GND F_MTR0
∗ 26
27 GND F_DR1
∗ 28
29 GND F_DR0
∗ 30
31 GND F_MTR1
∗ 32
33 GND F_DIR
∗ 34
35 GND F_STEP
∗ 36
37 GND F_WDATA
∗ 38
39 GND F_WGATE
∗ 40
41 GND F_TRK0
∗ 42
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