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ADSP-BF703KBCZ-4 Datasheet(PDF) 4 Page - Analog Devices |
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ADSP-BF703KBCZ-4 Datasheet(HTML) 4 Page - Analog Devices |
4 / 116 page Rev. A | Page 4 of 116 | September 2015 ADSP-BF700/701/702/703/704/705/706/707 BLACKFIN+ PROCESSOR CORE As shown in Figure 1, the processor integrates a Blackfin+ processor core. The core, shown in Figure 2, contains two 16-bit multipliers, one 32-bit multiplier, two 40-bit accumulators (which may be used together as a 72-bit accumulator), two 40-bit ALUs, one 72-bit ALU, four video ALUs, and a 40-bit shifter. The computation units process 8-, 16-, or 32-bit data from the register file. The compute register file contains eight 32-bit registers. When performing compute operations on 16-bit operand data, the register file operates as 16 independent 16-bit registers. All operands for compute operations come from the multiported register file and instruction constant fields. The core can perform two 16-bit by 16-bit multiply-accumu- lates or one 32-bit multiply-accumulate in each cycle. Signed and unsigned formats, rounding, saturation, and complex mul- tiplies are supported. The ALUs perform a traditional set of arithmetic and logical operations on 16-bit or 32-bit data. In addition, many special instructions are included to accelerate various signal processing tasks. These include bit operations such as field extract and pop- ulation count, divide primitives, saturation and rounding, and sign/exponent detection. The set of video instructions include byte alignment and packing operations, 16-bit and 8-bit adds with clipping, 8-bit average operations, and 8-bit subtract/abso- lute value/accumulate (SAA) operations. Also provided are the compare/select and vector search instructions. For certain instructions, two 16-bit ALU operations can be per- formed simultaneously on register pairs (a 16-bit high half and 16-bit low half of a compute register). If a second ALU is used, quad 16-bit operations are possible. The 40-bit shifter can perform shifts and rotates and is used to support normalization, field extract, and field deposit instructions. Figure 2. Blackfin+ Processor Core SEQUENCER ALIGN DECODE LOOP BUFFER A0 A1 8 8 8 8 40 40 DATA ARITHMETIC UNIT CONTROL UNIT R7.H R6.H R5.H R4.H R3.H R2.H R1.H R0.H R7.L R6.L R5.L R4.L R3.L R2.L R1.L R0.L ASTAT 40 40 32 32 32 32 32 32 32 LD0 LD1 SD DAG0 DAG1 ADDRESS ARITHMETIC UNIT I3 I2 I1 I0 L3 L2 L1 L0 B3 B2 B1 B0 M3 M2 M1 M0 SP FP P5 P4 P3 P2 P1 P0 DA1 DA0 32 32 32 PREG RAB 32 BARREL SHIFTER 16 32 16 72 |
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