TCM8002_08 Datasheet, PDF (21/25 Pages) Texas Instruments – DATA PROCESSOR FOR CELLULAR TELEPHONE

TCM8002
DATA PROCESSOR FOR CELLULAR TELEPHONE
SLWS008C − SEPTEMBER 1994 − REVISED JUNE 1996
PRINCIPLES OF OPERATION
address 13 − RX data word 3
This register contains the corrected received data bits 3−0 and the error-correction status detailed in Table 17.
Table 18. Received Data Word 3
BIT
FUNCTION
7 RX data bit 3
6 RX data bit 2
5 RX data bit 1
4 RX data bit 0
3 −0 Received-data decode status
Table 19. Error-Correction Status
RECEIVED DATA WORD 3
BIT 3 BIT 2 BIT 1 BIT 0
DECODE STATUS
0
0
0
0 No errors detected
0
0
0
1 One error detected in parity bits
0
0
1
0 Two errors detected in parity bits
0
0
1
1 Not used
0
1
0
0 One error corrected in data
0
1
0
1 One error corrected in data, one error detected in parity bits
0
1
1
0 Not used
0
1
1
1 Not used
1
0
0
0 Two errors corrected in data
1
0
0
1 Not used
1
0
1
0 Not used
1
0
1
1 Not used
1
1
0
0
More than two erasures occurred (see Note 2). Up to two data bits
are corrected.
1
1
0
1
More than two erasures occurred (see Note 2). One error detected
in parity bits. Up to one data bit are corrected.
1
1
1
0
More than two erasures occurred (see Note 2). Two errors in parity
bits are detected.
1
1
1
1 More than two errors detected. Data is not corrected.
NOTE 2: A bit erasure occurs when the bit is detected an equal number of times as a 1 and as a 0 over the
valid repeats.
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