參數(shù)資料
型號(hào)： ADSP-2186MKSTZ-300
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 34/40頁(yè)
文件大?。?/td> 0K
描述： IC DSP CONTROLLER 16BIT 100LQFP
標(biāo)準(zhǔn)包裝： 1
系列： ADSP-21xx
類(lèi)型： 定點(diǎn)
接口： 主機(jī)接口，串行端口
時(shí)鐘速率： 75MHz
非易失內(nèi)存： 外部
芯片上RAM： 40kB
電壓 - 輸入/輸出： 3.30V
電壓 - 核心： 2.50V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 100-LQFP
供應(yīng)商設(shè)備封裝： 100-LQFP（14x14）
包裝： 托盤(pán)
REV. 0
–4–
ADSP-2186M
ARCHITECTURE OVERVIEW
The ADSP-2186M instruction set provides flexible data moves
and multifunction (one or two data moves with a computation)
instructions. Every instruction can be executed in a single
processor cycle. The ADSP-2186M assembly language uses an
algebraic syntax for ease of coding and readability. A compre-
hensive set of development tools supports program development.
Figure 1 is an overall block diagram of the ADSP-2186M. The
processor contains three independent computational units:
the ALU, the multiplier/accumulator (MAC), and the shifter.
The computational units process 16-bit data directly and have
provisions to support multiprecision computations. The ALU
performs a standard set of arithmetic and logic operations;
division primitives are also supported. The MAC performs
single-cycle multiply, multiply/add, and multiply/subtract opera-
tions with 40 bits of accumulation. The shifter performs logical
and arithmetic shifts, normalization, denormalization, and
derive exponent operations.
The shifter can be used to efficiently implement numeric
format control, including multiword and block floating-point
representations.
The internal result (R) bus connects the computational units so
that the output of any unit may be the input of any unit on the
next cycle.
A powerful program sequencer and two dedicated data address
generators ensure efficient delivery of operands to these computa-
tional units. The sequencer supports conditional jumps, subroutine
calls, and returns in a single cycle. With internal loop counters
and loop stacks, the ADSP-2186M executes looped code with
zero overhead; no explicit jump instructions are required to
maintain loops.
Two data address generators (DAGs) provide addresses for
simultaneous dual operand fetches (from data memory and
program memory). Each DAG maintains and updates four
address pointers. Whenever the pointer is used to access data
(indirect addressing), it is post-modified by the value of one of
four possible modify registers. A length value may be associated
with each pointer to implement automatic modulo addressing
for circular buffers.
Efficient data transfer is achieved with the use of five
internal buses:
Program Memory Address (PMA) Bus
Program Memory Data (PMD) Bus
Data Memory Address (DMA) Bus
Data Memory Data (DMD) Bus
Result (R) Bus
The two address buses (PMA and DMA) share a single external
address bus, allowing memory to be expanded off-chip, and the
two data buses (PMD and DMD) share a single external data
bus. Byte memory space and I/O memory space also share the
external buses.
Program memory can store both instructions and data, permit-
ting the ADSP-2186M to fetch two operands in a single cycle,
one from program memory and one from data memory. The
ADSP-2186M can fetch an operand from program memory and
the next instruction in the same cycle.
In lieu of the address and data bus for external memory connec-
tion, the ADSP-2186M may be configured for 16-bit Internal
DMA port (IDMA port) connection to external systems. The
IDMA port is made up of 16 data/address pins and five control
pins. The IDMA port provides transparent, direct access to the
DSPs on-chip program and data RAM.
An interface to low-cost byte-wide memory is provided by the
Byte DMA port (BDMA port). The BDMA port is bidirectional
and can directly address up to four megabytes of external RAM
or ROM for off-chip storage of program overlays or data tables.
The byte memory and I/O memory space interface supports slow
memories and I/O memory-mapped peripherals with program-
mable wait state generation. External devices can gain control of
ARITHMETIC UNITS
SHIFTER
MAC
ALU
PROGRAM MEMORY ADDRESS
DATA MEMORY ADDRESS
PROGRAM MEMORY DATA
DATA MEMORY DATA
POWER-DOWN
CONTROL
MEMORY
PROGRAM
MEMORY
8K
24 BIT
DATA
MEMORY
8K
16 BIT
EXTERNAL
ADDRESS
BUS
EXTERNAL
DATA
BUS
BYTE DMA
CONTROLLER
FULL MEMORY MODE
SPORT0
SERIAL PORTS
SPORT1
PROGRAMMABLE
I/O
AND
FLAGS
TIMER
HOST MODE
OR
EXTERNAL
DATA
BUS
INTERNAL
DMA
PORT
DAG1
DATA ADDRESS
GENERATORS
DAG2
PROGRAM
SEQUENCER
ADSP-2100 BASE
ARCHITECTURE
Figure 1. Functional Block Diagram
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