Download Motorola MVME712-12 Technical data

Connector Pin Assignments
Floppy/LED Connector J4
A 50-pin high-density connector (J4 on the base board) supplies the
interface between the base board and an optional external floppy
disk drive. In addition to the 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
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
43
GND
F_WP∗
44
45
GND
F_RDATA∗
46
47
GND
F_HDSEL∗
48
49
GND
F_DSKCHG∗
50
4-7
4