ADM-XRC-7V1 User Manual
V1.9 - 23rd Aug 2016
3.11 XRM Interface and Front-Panel I/O
The XRM interface provides a high-performance and flexible front-panel interface through a range of
interchangeable XRM modules. Further details of the XRM modules can be found on the Alpha Data website.
The XRM interface consists of two samtec connectors, CN1 and CN2.
3.11.1 XRM Connector, CN1
Connector CN1 is for general-purpose signals, power and module control. The connector is a 180-way Samtec
connector with 3 fields.
The part fitted to the ADM-XRC-7V1 is Samtec QSH-090-01-F-D-A-K.
Full pinout information for this connector is listed in
to
3.11.2 XRM Connector CN2
Connector CN2 is for the high-speed serial (MGT) links.
The part fitted to the ADM-XRC-7V1 is Samtec QSE-014-01-F-D-DP-A-K.
Full pinout information for this connector is listed in
3.11.3 XRM I/F - GPIO
The general purpose IO (GPIO) signals are connected in 4 groups to the Target FPGA. Each group consists of
16 standard I/O pairs, a Regional Clock Capable pair and either 2 or 4 single-ended signals. There are no
on-board terminations on the pairs and any can be used in single-ended modes.
To allow fast data transfer, all of the GPIO signals within a group are delay matched to within 100ps.
All the XRM GPIO signals and FPGA IO banks share a common voltage, XRM_VIO, that can be either 1.8V,
1.5V or 1.2V. The required voltage is stored within the platform management PROM on the XRM.
Group
FPGA
Bank
Name
Function
Group A
16-17
XRM_DA (15:0)
16 diff. Pairs / 32 single-ended
XRM_DA_CC (16)
Regional Clock / GPIO pair / 2 single-ended
SA (1:0)
2 single-ended GPIO
Group B
15-16
XRM_DB (15:0)
16 diff. Pairs / 32 single-ended
XRM_DB_CC (16)
Regional Clock / GPIO pair / 2 single-ended
SB (1:0)
2 single-ended GPIO
Group C
15
XRM_DC (15:0)
16 diff. Pairs / 32 single-ended
XRM_DC_CC (16)
Regional Clock / GPIO pair / 2 single-ended
SC (1:0)
2 single-ended GPIO
Group D
17
XRM_DD (15:0)
16 diff. Pairs / 32 single-ended
XRM_DD_CC (16)
Regional Clock / GPIO pair / 2 single-ended
SD (3:0)
4 single-ended GPIO
Table 16 : XRM GPIO Groups
Page 20
Functional Description
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