GC1115_06 Datasheet, PDF (59/82 Pages) Texas Instruments – Crest Factor Reduction Processor

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GC1115
SLWS144C – FEBRUARY 2005 – REVISED JUNE 2006
SNAP_B_ADDRESS 0x72 (114) Type: Read only
Value at RESET: 0x0000
BITS
[10:0]
[15:11]
DESCRIPTION
Snapshot RAM A address: 0 to 2047
In capture mode:
Snap_RAM_A[0] = sample_I(0) [16 MSBs of 18-bit I sample]
Snap_RAM_A[1] = sample_Q(0) [16 MSBs of 18-bit Q samp]
...
Snap_RAM_A[2046] = sample_I(1023) [16 MSBs of I sample]
Snap_RAM_A[2047] = sample_Q(1023) [16 MSBs of Q sample]
In histogram mode:
Snap_RAM_A[0] = hist_hi_word(0)
Snap_RAM_A[1] = hist_lo_word(0)
...
Snap_RAM_A[2046] = hist_hi_word(1023)
Snap_RAM_A[2047] = hist_lo_word(1023)
Reserved
SNAP_B_DATA
0x73 (115) Type:
Read/Write
Value at RESET: 0x0000
The SNAP_B_DATA register allows access to the Snapshot RAM A memory location addressed by
SNAP_B_ADDRESS. Snapshot RAM A contains 2048 × 16-bit values, whose organization is described in the
discussion of SNAP_B_ADDRESS. After SNAP_B_DATA is read or written, the value in SNAP_B_ADDRESS is
auto-incremented.
BITS
[15:0]
Snapshot RAM A data
DESCRIPTION
SNAP_B_MINVAL 0x74 (116) Type: Read/Write
Value at RESET: 0x0000
The SNAP_B_MINVAL register is used only during Snapshot RAM A histogram mode. In histogram mode, the
microprocessor or DSP can specify a desired range of values to be histogrammed. The minimum value of
interest is SNAP_B_MINVAL, while the maximum value of interest is SNAP_B_MAXVAL. Input values ≤
SNAP_B_MINVAL will be counted in Snapshot RAM A’s histogram bin 0. Input values ≥ SNAP_B_MAXVAL will
be counted in Snapshot RAM A’s histogram bin 1023.
BITS
[15:0]
DESCRIPTION
Snapshot RAM A (in histogram mode): minimum allowable value
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