VersaLogic VL-EBX-18, Hardware Reference Manual, Page: 50 / 63

Interfaces and Connectors
EBX-18 Hardware Reference manual
43
Digital I/O Interface
The EBX-18 includes a 32-channel digital I/O interface. The digital lines are grouped as four 8-
bit bi-directional ports. Data direction and output driver type are configurable by software.
Input data can be inverted through register settings. Any I/O pin(s) can generate an interrupt on
change of state. All I/O pins use 3.3V signaling. As outputs, the I/O pins can source or sink an
absolute maximum of 25 mA each.
CAUTION:
Damage will occur if the I/O pins are connected to 5V logic.
EBX-18 digital I/O ports are accessed through the FPGA SPI interface.
E
XTERNAL
C
ONNECTIONS
Digital I/O channels 1-16 are accessed via connector J5 on the EBX-18. Table 29 lists the pinout
of these channels to a CBR-4004B paddleboard connected to J5.
Digital I/O channels 17-32 are accessed via connector J10 on the EBX-18. Table 30 lists the
pinout of these channels to the CBR-4004B paddleboard connected to J10.
Table 29: Digital I/O Connections – Channels 1-16
EBX-18 Board
J5 Pin
Signal CBR-4004 Connector
11 Digital I/O 1
J3
Digital IO
(See Figure 22 on page
53)
12 Digital I/O 2
13 Digital I/O 3
14 Digital I/O 4
15 GND
16 Digital I/O 5
J4
Digital IO
(See Figure 22 on page
53)
17 Digital I/O 6
18 Digital I/O 7
19 Digital I/O 8
20 GND
21 Digital I/O 9
J6
Digital IO
(See Figure 22 on page
53)
22 Digital I/O 10
23 Digital I/O 11
24 Digital I/O 12
25 Pushbutton reset
26 Digital I/O 13
J7
Digital IO
(See Figure 22 on page
53)
27 Digital I/O 14
28 Digital I/O 15
29 Digital I/O 16
30 GND