Errors and Status

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13.1.2Unexpected Frame Length: F

The F bit is set to 1 if the programmed frame length is strictly smaller than 40 or is strictly greater than 20730 for standalone mode.

The F bit is set to 1 if the programmed frame length has the following values for shared processing mode:

1.Frame length < 256 or frame length > 20480 or (frame length)%256 != 0 if opmode = 1 or 2.

2.Frame length < 128 or frame length > 20480 if opmode = 3.

13.1.3Unexpected Prolog Length: P

The P bit is set to 1 if the specified prolog length is strictly greater than 48. Values smaller than 4 are ignored by the hardware and 24 is used.

13.1.4Unexpected Subframe Length: SF

The SF bit is set to 1 if the specified subframe length is strictly greater than 20480 in shared processing mode.

13.1.5Unexpected Reliability Length: R

The R bit is set to 1 if the specified reliability length minus 1 is strictly smaller than 40 or greater than 128 in SA mode.

The R bit is set to 1 if the specified reliability length is not equal to 128 in SP mode if opmode = 1 or 2.

The R bit is set to 1 if the specified reliability length is less than 65 in SP mode if opmode = 3.

13.1.6Unexpected Signal to Noise Ratio: SNR

The SNR bit is set to 1 if the signal to noise ratio threshold is greater than 100.

13.1.7Unexpected Interleaver Table Load: INT

The INT bit is set to 1 if loading an interleaver table has been requested in SP mode.

13.1.8Unexpected Output Parameters Load: OP

The OP bit is set to 1 if loading the output parameters has been requested in SP mode.

13.1.9Unexpected Memory Access: ACC

The ACC bit is set to 1 when an unexpected memory access occurs. This can be used to spot any EDMA3 programming issues. This can occur when:

TCP2 is waiting for input configuration parameters state and memory access to any TCP2 memory but the interleaver memory is performed

TCP2 is waiting for systematics and parities state and memory access to any TCP2 memory other than the TCPINTER memory

TCP2 is waiting for a prioris state and memory access to any TCP2 memory other than the TCPAP memory

TCP2 is waiting for extrinsics state and memory access to any TCP2 memory other than the TCPEXT memory

TCP2 is waiting for hard decisions state and memory access to any TCP2 memory other than the TCPHD memory

TCP2 is waiting for output parameters state and memory access to any TCP2 memory

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TMS320C6457 Turbo-Decoder Coprocessor 2

SPRUGK1–March 2009

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Texas Instruments TMS320C6457 DSP Unexpected Frame Length F, Unexpected Prolog Length P, Unexpected Subframe Length SF