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Multi-purpose I/O
VL-EPU-3311 Reference Manual
38
The table below provides the pinout of the user I/O connector.
Table 8: User I/O Connector Pinout and Pin Orientation
Pin
Signal
Pin
Signal
1
+5 V
(Note 1)
2
GND
3
USB1_P
4
USB2_P
5
USB1_N
6
USB2_N
7
+5V
(Note 2)
8
GND
9
USB3_P
10
USB4_P
11
USB3_N
12
USB4_N
13
+3.3 V
(Note 3)
14
GND
15
SPKR#
16
PLED#
17
PWR_BTN#
18
RST_BTN#
19
GND
20
GND
21
I2C Clock
22
V_BATT
23
I2C Data
24
RETURN_BATT
25
GND
26
GND
27
GPIO1
28
GPIO2
29
GPIO3
30
GPIO4
31
GND
32
GND
33
GPIO5
34
GPIO6
35
GPIO7
36
GPIO8
37
+3.3 V
(Note 4)
38
GND
39
ETH0 LED
40
ETH1 LED
Notes:
1. This is the +5V VBUS power for USB Port 1 and 2.
2. This is the +5V VBUS power for USB Port 3 and 4.
3. This 3.3 V power goes off in sleep modes. The SPKR# uses this power as should the
PLED# (there is no requirement for PLED# to use this power, but the VL-CBR-4005B
paddleboard does).
4. This 3.3 V power can be turned on or off similar to the 3.3V power to the Mini Card via
the FPGA (can go off in sleep modes or always stay on; by default it goes off in sleep
modes). It is used for the 10
kΩ
pullup resistor power on the 8x GPIOs and usually for the
2x Ethernet LEDs, however, the Ethernet LEDs can be powered by a 3.3 V power source.
Cabling
An adapter cable, part number VL-CBR-4005A, is available for connecting the CBR-4005B
paddleboard to the VL-EPU-3311. This is a 12-inch, Pico-Clasp 40-pin to 40-pin cable.
If your application requires a custom cable, the following information will be useful:
EPU-3311 Board Connector
Mating Connector
Molex 501571-4007
Molex 501189-4010