Diskette Drive Interface Pin Assignments; Ide Interface Connectors - NEC POWERMATE VE - SERVICE MANUAL 05-1996 Service Manual

DISKETTE DRIVE INTERFACE PIN ASSIGNMENTS

Table A-9 provides the pin assignments for the diskette drive interface.
Ground Pin Signal Pin
1 2
3 4
5* 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
*Pin 5 is reserved for connector polarization.

IDE INTERFACE CONNECTORS

All signal levels in the IDE interface are TTL compatible. A logic 1 is a signal whose
voltage level is between 2.0 and 5.0 V. A logic 0 is a signal measuring between 0.00 V and
0.70 V.
The two system board IDE connectors are physically identical. Electrically the primary
IDE/PCI bus IDE connector is faster and the secondary IDE/PCI connector is slower. Table
A-10 provides the IDE pin assignments. All signals on the Host interface have the prefix
HOST. All negatively active signals are further prefixed with a "-" designation. All
positively active signals are prefixed with a "+" designation.
A-9 Diskette Drive Connector Pin Assignments
I/O
O
O
O
O
O
O
O
O
I
I
I
O
I
Connector Pin Assignments
Signal Name
FDHDIN
Not used
FDEDIN
INDEX
MOTEN1
DS2
DS1
MOTEN2
DIR
STEP
WRT DATA
WRT EN GATE
TRK0
WRT PROT
READ DATA
HS SEL
DSKT CHG
A-9