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Texas Instruments TMS320TCI648x User Manual

Page 204

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SRIO Registers

Table 147. Port Error and Status CSR n (SPn_ERR_STAT) Field Descriptions (continued)

Bit

Field

Value

Description

23–21

Reserved

0

These read-only bits return 0s when read.

20

OUTPUT_RETRY_ENC

Output retry condition encountered. Once set, the OUTPUT_RETRY_ENC bit
remains set until software writes a 1 to it.

0

The output port has not encountered a retry condition.

1

The output port has encountered a retry condition. This bit is set when bit 18
is set.

19

OUTPUT_RETRIED

Output retried. OUTPUT_RETRIED is a read-only bit.

0

The output port has not received a packet-retry control symbol.

1

The output port has received a packet-retry control symbol and cannot make
forward progress. This bit is set when bit 18 is set and is cleared when a
packet-accepted or packet-not-accepted control symbol is received.

18

OUTPUT_RETRY_STP

Output retry-stopped state. OUTPUT_RETRY_STP is a read-only bit.

0

The output port has not received a packet-retry control symbol and/or is not
in the "output retry-stopped" state.

1

The output port has received a packet-retry control symbol and is in the
"output retry-stopped" state.

17

OUTPUT_ERROR_ENC

Output transmission error encountered. Once set, the
OUTPUT_ERROR_ENC bit remains set until software writes a 1 to it.

0

The output port has not encountered a transmission error.

1

The output port has encountered (and possibly recovered from) a
transmission error. This bit is set when bit 16 is set.

16

OUTPUT_ERROR_STP

Output error-stopped. OUTPUT_ERROR_STP is a read-only bit.

0

The output port is not in the "output error-stopped" state.

1

The output port is in the "output error-stopped" state.

15–11

Reserved

0

These read-only bits return 0s when read.

10

INPUT_RETRY_STP

Input retry-stopped state. INPUT_RETRY_STP is a read-only bit.

0

The input port is not in the "input retry-stopped" state.

1

The input port is in the "input retry-stopped" state.

9

INPUT_ERROR_ENC

Input port transmission error encountered. Once set, the
INPUT_ERROR_ENC bit remains set until software writes a 1 to it.

0

The input port has not encountered a transmission error.

1

The input port has encountered (and possibly recovered from) a transmission
error. This bit is set when bit 8 is set.

8

INPUT_ERROR_STP

Input error-stopped state. INPUT_ERROR_STP is a read-only bit.

0

The input port is not in the "input error-stopped" state.

1

The input port is in the "input error-stopped" state.

7–5

Reserved

0

These read-only bits return 0s when read.

4

PORT_WRITE_PND

Port-write pending. This bit is only valid if the device is capable of issuing a
maintenance port-write transaction. Once set, the PORT_WRITE_PND bit
remains set until software writes a 1 to it.

0

The port has not encountered a condition which required it to initiate a
Maintenance Port-write operation.

1

The port has encountered a condition which required it to initiate a
Maintenance Port-write operation.

3

Reserved

0

This read-only bit returns 0 when read.

2

PORT_ERROR

Port unrecoverable error. Once set, the PORT_ERROR bit remains set until
software writes a 1 to it.

0

The input or output port has not encountered an error from which hardware
was unable to recover.

1

The input or output port has encountered an error from which hardware was
unable to recover.

204

Serial RapidIO (SRIO)

SPRUE13A – September 2006

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