參數(shù)資料
型號(hào)： ADZS-BF537-STAMP
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 2/68頁(yè)
文件大?。?/td> 0K
描述： SYSTEM DEV FOR ADSP-BF537
產(chǎn)品培訓(xùn)模塊： Blackfin® STAMP BSP
Blackfin® Processor Core Architecture Overview
Blackfin® Device Drivers
Blackfin® Optimizations for Performance and Power Consumption
Blackfin® System Services
標(biāo)準(zhǔn)包裝： 1
系列： Blackfin®
類型： DSP
適用于相關(guān)產(chǎn)品： ADSP-BF537
所含物品： ADSP-BF537 STAMP 板和軟件
配用： ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARD
相關(guān)產(chǎn)品： ADSP-BF537KBCZ-6BV-ND - IC DSP CTLR 16BIT 208CSPBGA
ADSP-BF537BBCZ-5BV-ND - IC DSP CTLR 16BIT 208CSPBGA
ADSP-BF537KBCZ-6AV-ND - IC DSP CTLR 16BIT 182CSPBGA
ADSP-BF537BBCZ-5AV-ND - IC DSP CTLR 16BIT 182CSPBGA
ADSP-BF537BBCZ-5B-ND - IC DSP CTLR 16BIT 208CSPBGA
ADSP-BF537BBC-5A-ND - IC DSP CTLR 16BIT 182CSPBGA
其它名稱： ADDS-BF537-STAMP
ADDS-BF537-STAMP-ND
Rev. J
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Page 10 of 68
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February 2014
SERIAL PORTS (SPORTs)
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors
incorporate two dual-channel synchronous serial ports
(SPORT0 and SPORT1) for serial and multiprocessor commu-
nications. The SPORTs support the following features:
I2S capable operation.
Bidirectional operation – Each SPORT has two sets of inde-
pendent transmit and receive pins, enabling eight channels
of I2S stereo audio.
Buffered (8-deep) transmit and receive ports – Each port
has a data register for transferring data words to and from
other processor components and shift registers for shifting
data in and out of the data registers.
Clocking – Each transmit and receive port can either use an
external serial clock or generate its own, in frequencies
ranging from (fSCLK/131,070) Hz to (fSCLK/2) Hz.
Word length – Each SPORT supports serial data words
from 3 bits to 32 bits in length, transferred most significant
bit first or least significant bit first.
Framing – Each transmit and receive port can run with or
without frame sync signals for each data word. Frame sync
signals can be generated internally or externally, active high
or low, and with either of two pulse widths and early or late
frame sync.
Companding in hardware – Each SPORT can perform
A-law or μ-law companding according to ITU recommen-
dation G.711. Companding can be selected on the transmit
and/or receive channel of the SPORT without additional
latencies.
DMA operations with single-cycle overhead – Each SPORT
can automatically receive and transmit multiple buffers of
memory data. The processor can link or chain sequences of
DMA transfers between a SPORT and memory.
Interrupts – Each transmit and receive port generates an
interrupt upon completing the transfer of a data word or
after transferring an entire data buffer, or buffers,
through DMA.
Multichannel capability – Each SPORT supports 128 chan-
nels out of a 1024-channel window and is compatible with
the H.100, H.110, MVIP-90, and HMVIP standards.
SERIAL PERIPHERAL INTERFACE (SPI) PORT
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors have
an SPI-compatible port that enables the processor to communi-
cate with multiple SPI-compatible devices.
The SPI interface uses three pins for transferring data: two data
pins (Master Output-Slave Input, MOSI, and Master Input-
Slave Output, MISO) and a clock pin (serial clock, SCK). An SPI
chip select input pin (SPISS) lets other SPI devices select the
processor, and seven SPI chip select output pins (SPISEL7–1) let
the processor select other SPI devices. The SPI select pins are
reconfigured programmable flag pins. Using these pins, the SPI
port provides a full-duplex, synchronous serial interface, which
supports both master/slave modes and multimaster
environments.
The SPI port’s baud rate and clock phase/polarities are pro-
grammable, and it has an integrated DMA controller,
configurable to support transmit or receive data streams. The
SPI’s DMA controller can only service unidirectional accesses at
any given time.
The SPI port’s clock rate is calculated as:
where the 16-bit SPI_BAUD register contains a value of 2
to 65,535.
During transfers, the SPI port simultaneously transmits and
receives by serially shifting data in and out on its two serial data
lines. The serial clock line synchronizes the shifting and sam-
pling of data on the two serial data lines.
UART PORTS
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors pro-
vide two full-duplex universal asynchronous receiver and
transmitter (UART) ports, which are fully compatible with PC-
standard UARTs. Each UART port provides a simplified UART
interface to other peripherals or hosts, supporting full-duplex,
DMA-supported, asynchronous transfers of serial data. A
UART port includes support for five to eight data bits, one or
two stop bits, and none, even, or odd parity. Each UART port
supports two modes of operation:
PIO (programmed I/O) – The processor sends or receives
data by writing or reading I/O mapped UART registers.
The data is double-buffered on both transmit and receive.
DMA (direct memory access) – The DMA controller trans-
fers both transmit and receive data. This reduces the
number and frequency of interrupts required to transfer
data to and from memory. The UART has two dedicated
DMA channels, one for transmit and one for receive. These
DMA channels have lower default priority than most DMA
channels because of their relatively low service rates.
Each UART port’s baud rate, serial data format, error code gen-
eration and status, and interrupts are programmable:
Supporting bit rates ranging from (fSCLK/1,048,576) to
(fSCLK/16) bits per second.
Supporting data formats from 7 bits to 12 bits per frame.
Both transmit and receive operations can be configured to
generate maskable interrupts to the processor.
The UART port’s clock rate is calculated as:
where the 16-bit UARTx_Divisor comes from the UARTx_DLH
register (most significant 8 bits) and UARTx_DLL register (least
significant 8 bits).
SPI Clock Rate
fSCLK
2
SPI_BAUD
------------------------------------
=
UART Clock Rate
fSCLK
16
UARTx_Divisor
--------------------------------------------------
=
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