Fmc Hpc Connectors - Xilinx SP623 User Manual

Chapter 1: SP623 Board Features and Operation
The CP2103 supports an IO voltage range of 1.8V to 2.5V on the SP623 board. The
connections between the FPGA and CP2103 should use the LVCMOS25 IO standard.
UART IP (for example, Xilinx® XPS UART Lite) must be implemented in the FPGA fabric.
The FPGA supports the USB to UART bridge using four signal pins:
•
•
•
•
Connections of these signals between the FPGA and the CP2103 at U26 are listed in
Table
Table 1-15: FPGA to U26 (CP2103 USB to UART Bridge) Connections
The bridge device also provides as many as 4 GPIO signals that can be defined by the user
for status and control information
Table 1-16: CP2103 USB to UART Bridge User GPIO
A royalty-free software driver named Virtual COM Port (VCP) is available from Silicon
Laboratories. This driver permits the CP2103 USB to UART bridge to appear as a COM
port to the host computer communications application software (for example,
HyperTermimal or TeraTerm). The VCP driver must be installed on the host computer
prior to establishing communications with the SP623 board.

FMC HPC Connectors

[Figure
The SP623 board features two high pin count (HPC) connectors as defined by the VITA
57.1.1 FMC specification. Each FMC HPC connector is a 10 x 40 position socket that is fully
populated with 400 pins. See
cross-reference of signal names to pin coordinates.
The FMC1 HPC connector at J112 on the SP623 board provides connectivity for:
•
24
Transmit (TX)
Receive (RX)
Request to Send (RTS)
Clear to Send (CTS).
1-15.
FPGA Pin FPGA Function
L23 RTS, output
L23 CTS, input
N20 TX, data out
N19 RX, data in
FPGA Pin Net Name
P22 USB_GPIO0
P21 USB_GPIO1
N22 USB_GPIO2
N21 USB_GPIO3
1-2, callouts 20a, and 20b]
58 differential user-defined pairs:
• 34 LA pairs
• 24 HA pairs
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Net Name U26 Pin
USB_CTS
USB_RTS
USB_RX
USB_TX
(Table 1-16).
U26 Pin
19
18
17
16
Appendix B, VITA 57.1 FMC HPC Connector Pinout
U26 Function
22 CTS, input
23 RTS, output
24 RXD, data in
25 TXD, data out
SP623 Board User Guide
UG751 (v1.0) May 22, 2010
for a