ADSP-BF537BBCZ-5AV Просмотр технического описания (PDF) - Analog Devices
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ADSP-BF537BBCZ-5AV Datasheet PDF : 68 Pages
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ADSP-BF534/ADSP-BF536/ADSP-BF537
BLACKFIN PROCESSOR CORE
As shown in Figure 2, the Blackfin processor core contains two
16-bit multipliers, two 40-bit accumulators, two 40-bit ALUs,
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.
Each MAC can perform a 16-bit by 16-bit multiply in each
cycle, accumulating the results into the 40-bit accumulators.
Signed and unsigned formats, rounding, and saturation
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, modulo 232 multiply, 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/absolute 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 the 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.
The program sequencer controls the flow of instruction execu-
tion, including instruction alignment and decoding. For
program flow control, the sequencer supports PC relative and
indirect conditional jumps (with static branch prediction), and
subroutine calls. Hardware is provided to support zero-over-
head looping. The architecture is fully interlocked, meaning that
the programmer need not manage the pipeline when executing
instructions with data dependencies.
ADDRESS ARITHMETIC UNIT
DA1 32
DA0 32
I3 L3 B3
M3
I2 L2 B2
M2
I1 L1 B1
M1
I0 L0 B0
M0
DAG1
32
RAB
DAG0
SP
FP
P5
P4
P3
P2
P1
P0
32
PREG
SD 32
LD1 32
LD0 32
32
32
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
16
8
8
BARREL
SHIFTER
40
16
8
40
A0
40 40
A1
32
32
DATA ARITHMETIC UNIT
Figure 2. Blackfin Processor Core
ASTAT
8
SEQUENCER
ALIGN
DECODE
LOOP BUFFER
CONTROL
UNIT
Rev. J | Page 4 of 68 | February 2014
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