IDT sRIO Ports
Revision 1.5
Integrated Device Technology, Inc.
CPS-16/12/8 User Manual
2 - 2
July 10, 2012
The CPS supports lane to port assignments which are numbered from lane 0 to lane 15 in ordered fashion
in groups of 4 to ports 0 through 15.
An Enhanced port is capable of either being mapped into 4 device ports (if it is configured as 4 1x types) or
a single device port (if it is configured as one 4x-port or one 1x-port).
The table below is informational and shows examples of configurations with various 1x and 4x device port
complements versus link usage.
2.1.2 Data Rates
Each CPS sRIO Link is capable of full functionality at configurable rates of 1.25 Gbps, 2.5 Gbps, and 3.125
Gbps as defined in the Serial RapidIO Specifications revision 1.3.
2.1.3 Lane Configuration
SRIO lane characteristics is configurable via a set of QUAD_n_CTRL registers. These characteristics
include the following:
-- Data Rate
-- Transmitter Pre-emphasis
-- Drive Strength
For the CPS device, control of each of these parameters are separately configurable, such that the charac-
teristics for lanes 0 and 1 can be different from those for land 2 and 3
12
3
Enhanced
12
4 by 1x
13
Enhanced
13
14
Enhanced
14
15
Enhanced
15
Table 2.2 Port Configuration Examples
4x Ports
1x Ports
Total Lanes Used
Quad Configurations
4
0
16
1 by 4x (4 total)
3
1
16
1 by 4x (3 total)
1 by 1x (1 total)
3
4
16
1 by 4x (3 total)
4 by 1x (1 total)
2
8
16
2 by 4x (2 total)
4 by 1x (2 total)
1
12
16
1 by 4x (1 total)
4 by 1x (3 total)
1
3
16
1 by 4x (1 total)
1 by 1x (3 total)
0
16
16
4 by 1x (4 total)
Table 2.1 Port Numbering
Lane
Quad Number
Quad Mode
Port Number
(1x Capacity)
Reset
Configuration
