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12. Serial RapidIO Registers > Conventions 234
Tsi576 User Manual
June 6, 2016
Integrated Device Technology
www.idt.com
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.
14 Serial Port 14 (SP14) Unavailable This port is un-initialized and the
port registers must be treated
as reserved.
Writes to port registers can
cause undefined behavior and
is not recommended. The
registers can be read.
15 Serial Port 15 (SP15) Unavailable This port is un-initialized and the
port registers must be treated
as reserved.
Writes to port registers can
cause undefined behavior and
is not recommended. The
registers can be read.
Port 0 should not be powered-down. Refer to “Special Conditions for Port 0 Power Down” on
page 73 for more information
Table 34: Tsi576 Port Numbering
Port Number RapidIO Port Mode Note