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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)

31-30

29-28

27-26

25-24

23-16

 

OUTPORTID

PRIORITY

XAMBS

ID_SIZE

DESTID

 

RW-0x00

RW-0x00

RW-0x00

RW-0x00

RW-0x00

 

LEGEND: R = Read only; -n= value after reset

 

 

 

 

15-8

 

 

7-1

0

 

DESTID

 

 

Reserved

INTER

 

 

 

 

 

RUPT

 

 

 

 

 

_REQ

 

RW-0x00

 

R-0x00

RW-

 

 

 

 

 

0x00

LEGEND: R = Read only; -n= value after reset

Table 75. LSUn Control Register 4 (LSUn_REG4) Field Descriptions

Bit

Field

Value

Description

31-30

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.

29-28

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.

27-26

XAMBS

 

RapidIO xambs field specifying extended address MSB

25-24

ID_SIZE

 

RapidIO tt field specifying 8 or 16bit DeviceIDs

 

 

00b

8 bit device Ids

 

 

01b

16 bit device Ids

23-8

DESTID

 

RapidIO destinationID field specifying target device

7-1

Reserved

 

Reserved

0

INTERRUPT_RE

 

CPU controlled request bit used for interrupt generation. Typically used in conjunction with

 

Q

 

Non-posted commands to alert the CPU when the requested data/status is present.

 

 

0b

Interrupt is not requested upon completion of command

 

 

1b

Interrupt is requested upon completion of command

146

Serial RapidIO (SRIO)

SPRU976 –March 2006

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Texas Instruments TMS320C645x manual LSUn Control Register 4 LSUnREG4 Field Descriptions