12. Serial RapidIO Registers > Port Numbering
227
Tsi574 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
12.2
Port Numbering
The following table shows the mapping between port numbers and the physical ports. These port
numbers are used within the destination ID lookup tables for ingress RapidIO ports and in numerous
register configuration fields.
12.3
Conventions
In many instances, there are multiple instances of a register, for example, one instance per RapidIO
port. Two notations are used to refer to these registers.
•
In the first notation, a lower-case letter such as “x” is used as a wildcard character. For example,
Sx_DESTID refers to S0_DESTID, S1_DESTID, S2_DESTID, and so on.
•
In the second notation, the names of the instances are explicitly listed. For example,
S{BC,0..2}_DESTID refers to registers SBC_DESTID, S0_DESTID, S1_DESTID, and
S2_DESTID.
Generally, the instance number refers to a RapidIO port number. The special instance “BC” (broadcast)
refers to a register that when written simultaneously affects all powered-up ports, and that when read
returns a value from port number 0.
The odd ports are unavailable when the even port is in 4x mode.
Table 34: Port Numbering
Port Number
RapidIO Port
Mode
0
Serial Port 0 (SP0)
1x or 4x
1
Serial Port 1 (SP1)
1x
2
Serial Port 2 (SP2)
1x or 4x
3
Serial Port 3 (SP3)
1x
4
Serial Port 4 (SP4)
1x or 4x
5
Serial Port 5 (SP5)
1x
6
Serial Port 6 (SP6)
1x or 4x
7
Serial Port 7 (SP7)
1x
Port 0 should not be powered-down. Refer to
