Interfaces and Connectors
EBX-11 Reference manual
55
SPX
™ Expansion Bus
Up to four serial peripheral expansion (SPX) devices can be attached to the EBX-11 at connector
J17 using the CBR-1401 or CBR-1402 cable. The SPX interface provides the standard SPI
signals: SCLK, MISO, and MOSI, as well as four chip selects, SS0# to SS3#, and an interrupt
input, SINT#.
Table 29: SPI Expansion Bus Connections
J17 Pin
Signal
Name
Function
1
V5_0
+5.0V
2
SCLK
Serial Clock
3
GND
Ground
4
MISO
Serial Data In
5
GND
Ground
6
MOSI
Serial Data Out
7
GND
Ground
8
SS0#
Chip Select 0
9
SS1#
Chip Select 1
10
SS2#
Chip Select 2
11
SS3#
Chip Select 3
12
GND
Ground
13
SINT#
Interrupt Input
14
V5_0
+5.0V
V
ERSA
L
OGIC
SPX
E
XPANSION
M
ODULES
VersaLogic offers a number of SPX modules that provide a variety of standard functions, such as
analog input, digital I/O, CANbus controller, and others. These are small boards (1.2” x 3.775”)
that can mount on the PC/104 and PC/104-
Plus
stack, using standard PC/104 stand-offs, or up to
two feet away from the base board. For more information, contact VersaLogic at
StockCheck.com