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SRIO Registers
5.45LSUn Control Register 4 (LSUn_REG4)
There are four of these registers, one for each LSU.
Figure 101. LSUn Control Register 4 (LSUn_REG4)
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OUTPORTID  | PRIORITY  | XAMBS  | ID_SIZE  | DESTID  | 
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LEGEND: R = Read only;   | 
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  | 0  | ||
  | DESTID  | 
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  | Reserved  | INTER  | 
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  | RUPT  | 
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  | _REQ  | 
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  | RW-  | |||
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  | 0x00  | 
LEGEND: R = Read only; 
Table 75. LSUn Control Register 4 (LSUn_REG4) Field Descriptions
Bit | Field | Value  | Description | 
OUTPORTID | 
  | Not applicable for Rapid IO header. Indicates the output port number for the packet to be  | |
  | 
  | 
  | transmitted from. Specified by the CPU along with NodeID.  | 
PRIORITY  | 
  | RapidIO prio field specifying packet priority. Request packets should not be sent at a priority level of  | |
  | 
  | 
  | 3 in order to avoid system deadlock. It is the responsibility of the software to assign the appropriate  | 
  | 
  | 
  | outgoing priority.  | 
XAMBS  | 
  | RapidIO xambs field specifying extended address MSB  | |
ID_SIZE  | 
  | RapidIO tt field specifying 8 or 16bit DeviceIDs  | |
  | 
  | 00b  | 8 bit device Ids  | 
  | 
  | 01b  | 16 bit device Ids  | 
DESTID  | 
  | RapidIO destinationID field specifying target device  | |
Reserved  | 
  | Reserved  | |
0  | INTERRUPT_RE | 
  | CPU controlled request bit used for interrupt generation. Typically used in conjunction with  | 
  | Q  | 
  | |
  | 
  | 0b  | Interrupt is not requested upon completion of command  | 
  | 
  | 1b  | Interrupt is requested upon completion of command  | 
146  | Serial RapidIO (SRIO)  | SPRU976   |