C
URTISS
-W
RIGHT
C
ONTROLS
E
MBEDDED
C
OMPUTING
814256 V
ERSION
2 F
EBRUARY
2006
A-3
Note:
V(I/O) can be 3.3 or 5v to allow this to go into any slot (3.3v, 5v, universal)
E
LECTRICAL
C
HARACTERISTICS
OF
J1 S
IGNALS
Table A.2 provides the electrical characteristics of the basecard J1 signals.
Note:
Signal details are for the basecard signals only. PMC I/O lines depend on the PMC
modules installed, and are beyond the scope of this document.
T
ABLE
A.1:
J1 Connector Pin Assignments
Pin No.
Row E
Row D
Row C
Row B
Row A
25
5V
3.3V
NC
NC
5V
24
NC
NC
V(I/O)
5V
NC
23
NC
EP5V
NC
NC
3.3V
22
NC
NC
EP3.3V
GND
NC
21
NC
NC
NC
NC
3.3V
20
NC
NC
V(I/O)
GND
NC
19
NC
GND
NC
NC
3.3V
18
NC
NC
3.3V
GND
NC
17
NC
GND
NC
NC
3.3V
16
NC
NC
V(I/O)
GND
NC
15
NC
BD_SEL#
NC
NC
3.3V
14
13
Key Area
12
11
NC
GND
NC
NC
NC
10
NC
NC
3.3V
GND
NC
9
NC
GND
NC
NC
NC
8
NC
NC
V(I/O)
GND
NC
7
NC
GND
NC
NC
NC
6
NC
NC
EP3.3V
PCI_PRES#
NC
5
NC
GND
CPCI_RST
RSV
NC
4
NC
NC
V(I/O)
HEALTHY#
NC
3
NC
EP5V
NC
NC
NC
2
NC
NC
NC
5V
NC
1
5V
+12V
NC
-12V
5V
T
ABLE
A.2:
J1 Connector Description
Signal
Name
Direction Basecard Signal Description
Electrical
Characteristics
PCI_PRES#
Input
Pull up on PWB, tied low or left floating on backplane. When low indicates
that the backplane supports a Compact PCI bus. Signal is not currently
used on the Compact CHAMP-AV IV.
GND or floating on
backplane.
HEALTHY#
Output
Active low signal indicates that on-board power is up and within
specification.
open-drain
BD_SEL#
Input
Active low signal indicates that cPCI board is fully inserted into chassis,
and that on-board power up may begin.
3.3v pull-up on board.
Signal is either grounded
on backplane or actively
driven low by an open-
drain driver.
CPCI_RST#
Input
Active low signal resets boards.
Open drain input. 3.3v
pull-up on board.
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