Motorola DSP56305 User Manual page 20

12.4.6.7 FCOP Data Input Buffer Empty (FDIBE)-
FCSR Bit 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
12.4.6.8 FCOP Data Output Buffer Full (FDOBF)-
FCSR Bit 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
12.4.6.9 FCOP Reserved Unused Bits-FCSR Bits 1, 3, 9, 13 . 12-13
12.4.6.10 FCOP Reserved Used Bits-FCSR Bits 2, 6, 7 . . . . . . 12-13
12.4.7 Interrupts and DMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14
12.5 OPERATION MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14
12.5.1 Terminology Used in this Section . . . . . . . . . . . . . . . . . . . 12-15
12.5.2 Input DMA Activation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-15
12.5.3 Output DMA Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16
12.5.4 Decimation by 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16
12.5.5 FCOP Mode 0: Real FIR Filter . . . . . . . . . . . . . . . . . . . . . 12-17
12.5.5.1 Mode 0 (Real FIR Filter), No Decimation . . . . . . . . . . . 12-17
12.5.5.2 Mode 0 (Real FIR Filter), Decimation by 2 . . . . . . . . . . 12-19
12.5.5.3 Mode 0 (Complex FIR Filter Generating
Real Outputs Only), Decimation by 2 . . . . . . . . . . . . . . 12-21
12.5.6 FCOP Mode 1: Full Complex FIR Filter . . . . . . . . . . . . . . 12-23
12.5.6.1 Mode 1(Full Complex FIR Filter), No Decimation. . . . . 12-23
12.5.6.2 Mode 1 (Full Complex Correlation Filter),
No Decimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-25
12.5.6.3 Mode 1 (Full Complex FIR Filter), Decimation by 2 . . . 12-27
12.5.7 FCOP Mode 2: Full Complex FIR Filter . . . . . . . . . . . . . . 12-29
12.5.7.1 Mode 2 (Complex FIR Filter Generating Pure Real or Pure
Imaginary Outputs Alternately), No Decimation1 . . . . . . 2-29
12.5.7.2 Mode 2 (Complex FIR Filter Generating Pure Real and Pure
Imaginary Outputs Alternately), Decimation by 2 . . . . . 12-31
12.5.8 FCOP Mode 3: Optimized Complex Correlation Function 12-34
12.5.8.1 Mode 3 (Complex Correlation of Non-Oversampled Data),
No Decimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-34
12.5.8.2 Mode 3 (Complex Correlation of 2¥ Oversampled Data),
No Decimation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-37
12.6 PERFORMANCE ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . 12-40
SECTION 13 VITERBI CO-PROCESSOR . . . . . . . . . . . . . . . . . . . 13-1
13.1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-3
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