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參數(shù)資料
| 型號： | ADSP-21990BST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | 16-bit fixed point DSP with Flash |
| 中文描述： | 16-BIT, 160 MHz, OTHER DSP, PQFP176 |
| 封裝： | MS-026BGA, LQFP-176 |
| 文件頁數(shù)： | 7/44頁 |
| 文件大小： | 574K |
| 代理商： | ADSP-21990BST |
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REV. 0
ADSP-21990
Finally, the ADSP-21990 contains an integrated power-on-reset
(POR) circuit that can be used to generate the required reset
signal for the device on power-on.
The ADSP-21990 has an external memory interface that is
shared by the DSP core, the DMA controller, and DMA capable
peripherals, which include the ADC, SPORT, and SPI commu-
nication ports. The external port consists of a 16-bit data bus, a
20-bit address bus, and control signals. The data bus is config-
urable to provide an 8- or 16-bit interface to external memory.
Support for word packing lets the DSP access 16- or 24-bit words
from external memory regardless of the external data bus width.
The memory DMA controller lets the ADSP-21990 move data
and instructions from between memory spaces: internal-to-
external, internal-to-internal, and external-to-external. On-chip
peripherals can also use this controller for DMA transfers.
The embedded ADSP-219x core can respond to up to seventeen
interrupts at any given time: three internal (stack, emulator
kernel, and power down), two external (emulator and reset), and
twelve user defined (peripherals) interrupts. Programmers assign
each of the 32 peripheral interrupt requests to one of the 12 user
defined interrupts. These assignments determine the priority of
each peripheral for interrupt service.
The following sections provide a functional overview of the
ADSP-21990 peripherals.
Serial Peripheral Interface (SPI) Port
The Serial Peripheral Interface (SPI) Port provides functionality
for a generic configurable serial port interface based on the SPI
standard, which enables the DSP to communicate with multiple
SPI compatible devices. Key features of the SPI port are:
Interface to host microcontroller or serial EEPROM
Master or slave operation (3-wire interface MISO, MOSI,
SCK)
Data rates to HCLK 4 (16-bit baud rate selector)
8- or 16-bit transfer
Programmable clock phase and polarity
Broadcast Mode – 1 master, multiple slaves
DMA capability and dedicated interrupts
PF0 can be used as Slave Select input line
PF1–PF7 can be used as external Slave Select output
SPI is a 3-wire interface consisting of 2 data pins (MOSI and
MISO), one clock pin (SCK), and a single Slave Select input
(
SPISS
) that is multiplexed with the PF0 Flag IO line and seven
Slave Select outputs (SPISEL1 to SPISEL7) that are multiplexed
with the PF1 to PF7 Flag IO lines. The
SPISS
input is used to
select the ADSP-21990 as a slave to an external master. The
SPISEL1 to SPISEL7 outputs can be used by the ADSP-21990
(acting as a master) to select/enable up to seven external slaves
in a multidevice SPI configuration. In a multimaster or a multi-
device configuration, all MOSI pins are tied together, all MISO
pins are tied together, and all SCK pins are tied together.
During transfers, the SPI port simultaneously transmits and
receives by serially shifting data in and out on the serial data line.
The serial clock line synchronizes the shifting and sampling of
data on the serial data line.
In master mode, the DSP core performs the following sequence
to set up and initiate SPI transfers:
1. Enables and configures the SPI port operation (data size,
and transfer format).
2. Selects the target SPI slave with the SPISELx output pin
(reconfigured Programmable Flag pin).
3. Defines one or more DMA descriptors in Page 0 of I/O
memory space (optional in DMA mode only).
4. Enables the SPI DMA engine and specifies transfer
direction (optional in DMA mode only).
5. In non DMA mode only, reads or writes the SPI port
receive or transmit data buffer.
The SCK line generates the programmed clock pulses for simul-
taneously shifting data out on MOSI and shifting data in on
MISO. In DMA mode only, transfers continue until the SPI
DMA word count transitions from 1 to 0.
In slave mode, the DSP core performs the following sequence to
set up the SPI port to receive data from a master transmitter:
1. Enables and configures the SPI slave port to match the
operation parameters set up on the master (data size and
transfer format) SPI transmitter.
2. Defines and generates a receive DMA descriptor in
Page 0 of memory space to interrupt at the end of the
data transfer (optional in DMA mode only).
3. Enables the SPI DMA engine for a receive access
(optional in DMA mode only).
4. Starts receiving the data on the appropriate SCK edges
after receiving an SPI chip select on the
SPISS
input pin
(reconfigured Programmable Flag pin) from a master.
In DMA mode only, reception continues until the SPI DMA
word count transitions from 1 to 0. The DSP core could
continue, by queuing up the next DMA descriptor.
Slave mode transmit operation is similar, except that the DSP
core specifies the data buffer in memory space from which to
transmit data, generates and relinquishes control of the transmit
DMA descriptor, and begins filling the SPI port data buffer. If
the SPI controller is not ready on time to transmit, it can transmit
a “zero” word.
DSP Serial Port (SPORT)
The ADSP-21990 incorporates a complete synchronous serial
port (SPORT) for serial and multiprocessor communications.
The SPORT supports the following features:
Bidirectional: the SPORT has independent transmit and
receive sections.
Double buffered: the SPORT section (both receive and
transmit) has a data register for transferring data words
to and from other parts of the processor and a register for
shifting data in or out. The double buffering provides
additional time to service the SPORT.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADSP-21990BSTZ | 功能描述:IC DSP CONTROLLER 16BIT 176-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標準包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:1.436MB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:431-BFBGA，F(xiàn)CBGA 供應商設(shè)備封裝:431-FCPBGA（20x20） 包裝:托盤 |
| ADSP-21991BBC | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 150MHz 150MIPS 196-Pin Mini-BGA |
| ADSP-21991BBCZ | 功能描述:IC DSP CTLR 16BIT 196CSPBGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標準包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:1.436MB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:431-BFBGA，F(xiàn)CBGA 供應商設(shè)備封裝:431-FCPBGA（20x20） 包裝:托盤 |
| ADSP-21991BST | 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 160MHz 160MIPS 176-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:HIGH PERFORMANCE MIXED SIGNAL DSP - Bulk |
| ADSP-21991BSTZ | 功能描述:IC DSP CONTROLLER 16BIT 176-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:ADSP-21xx 標準包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:1.436MB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:-40°C ~ 105°C 安裝類型:表面貼裝 封裝/外殼:431-BFBGA，F(xiàn)CBGA 供應商設(shè)備封裝:431-FCPBGA（20x20） 包裝:托盤 |
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