參數(shù)資料
型號(hào)： ADSP-BF536BBCZ-4B
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 68/68頁(yè)
文件大?。?/td> 0K
描述： IC DSP CTLR 16BIT 208CSPBGA
產(chǎn)品培訓(xùn)模塊： 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： 定點(diǎn)
接口： CAN，SPI，SSP，TWI，UART
時(shí)鐘速率： 400MHz
非易失內(nèi)存： 外部
芯片上RAM： 100kB
電壓 - 輸入/輸出： 2.50V，3.30V
電壓 - 核心： 1.20V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 208-LFBGA，CSPBGA
供應(yīng)商設(shè)備封裝： 208-CSPBGA
包裝： 托盤(pán)
Rev. J
|
Page 9 of 68
|
February 2014
In addition to the dedicated peripheral DMA channels, there are
two memory DMA channels provided for transfers between the
various memories of the processor system. This enables trans-
fers of blocks of data between any of the memories—including
external SDRAM, ROM, SRAM, and flash memory—with mini-
mal processor intervention. Memory DMA transfers can be
controlled by a very flexible descriptor-based methodology or
by a standard register-based autobuffer mechanism.
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors also
have an external DMA controller capability via dual external
DMA request pins when used in conjunction with the external
bus interface unit (EBIU). This functionality can be used when a
high speed interface is required for external FIFOs and high
bandwidth communications peripherals such as USB 2.0. It
allows control of the number of data transfers for memDMA.
The number of transfers per edge is programmable. This feature
can be programmed to allow memDMA to have an increased
priority on the external bus relative to the core.
REAL-TIME CLOCK
The real-time clock (RTC) provides a robust set of digital watch
features, including current time, stopwatch, and alarm. The
RTC is clocked by a 32.768 kHz crystal external to the
processor. The RTC peripheral has dedicated power supply pins
so that it can remain powered up and clocked even when the
rest of the processor is in a low power state. The RTC provides
several programmable interrupt options, including interrupt
per second, minute, hour, or day clock ticks, interrupt on pro-
grammable stopwatch countdown, or interrupt at a
programmed alarm time.
The 32.768 kHz input clock frequency is divided down to a 1 Hz
signal by a prescaler. The counter function of the timer consists
of four counters: a 60-second counter, a 60-minute counter, a
24-hour counter, and an 32,768-day counter.
When enabled, the alarm function generates an interrupt when
the output of the timer matches the programmed value in the
alarm control register. There are two alarms: The first alarm is
for a time of day, while the second alarm is for a day and time of
that day.
The stopwatch function counts down from a programmed
value, with one-second resolution. When the stopwatch is
enabled and the counter underflows, an interrupt is generated.
Like the other peripherals, the RTC can wake up the processor
from sleep mode upon generation of any RTC wake-up event.
Additionally, an RTC wake-up event can wake up the processor
from deep sleep mode, and wake up the on-chip internal voltage
regulator from the hibernate operating mode.
Connect RTC pins RTXI and RTXO with external components
as shown in Figure 4.
WATCHDOG TIMER
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors
include a 32-bit timer that can be used to implement a software
watchdog function. A software watchdog can improve system
availability by forcing the processor to a known state through
generation of a system reset, nonmaskable interrupt (NMI), or
general-purpose interrupt, if the timer expires before being reset
by software. The programmer initializes the count value of the
timer, enables the appropriate interrupt, then enables the timer.
Thereafter, the software must reload the counter before it
counts to zero from the programmed value. This protects the
system from remaining in an unknown state where software,
which would normally reset the timer, has stopped running due
to an external noise condition or software error.
If configured to generate a hardware reset, the watchdog timer
resets both the core and the processor peripherals. After a reset,
software can determine if the watchdog was the source of the
hardware reset by interrogating a status bit in the watchdog
timer control register.
The timer is clocked by the system clock (SCLK), at a maximum
frequency of fSCLK.
TIMERS
There are nine general-purpose programmable timer units in
the processor. Eight timers have an external pin that can be con-
figured either as a pulse-width modulator (PWM) or timer
output, as an input to clock the timer, or as a mechanism for
measuring pulse widths and periods of external events. These
timers can be synchronized to an external clock input to the sev-
eral other associated PF pins, to an external clock input to the
PPI_CLK input pin, or to the internal SCLK.
The timer units can be used in conjunction with the two UARTs
and the CAN controller to measure the width of the pulses in
the data stream to provide a software auto-baud detect function
for the respective serial channels.
The timers can generate interrupts to the processor core provid-
ing periodic events for synchronization, either to the system
clock or to a count of external signals.
In addition to the eight general-purpose programmable timers,
a ninth timer is also provided. This extra timer is clocked by the
internal processor clock and is typically used as a system tick
clock for generating periodic interrupts in an operating system.
Figure 4. External Components for RTC
RTXO
C1
C2
X1
SUGGESTED COMPONENTS:
X1 = ECLIPTEK EC38J (THROUGH-HOLE PACKAGE) OR
EPSON MC405 12 pF LOAD (SURFACE-MOUNT PACKAGE)
C1 = 22 pF
C2 = 22 pF
R1 = 10 M
NOTE: C1 AND C2 ARE SPECIFIC TO CRYSTAL SPECIFIED FOR X1.
CONTACT CRYSTAL MANUFACTURER FOR DETAILS. C1 AND C2
SPECIFICATIONS ASSUME BOARD TRACE CAPACITANCE OF 3 pF.
RTXI
R1
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參數(shù)描述
ADSP-BF536BBCZ4BRL 功能描述:IC DSP CTLR 16BIT 208CSBGA 制造商:analog devices inc. 系列:Blackfin? 包裝:帶卷（TR） 零件狀態(tài):有效 類型:定點(diǎn) 接口:CAN，SPI，SSP，TWI，UART 時(shí)鐘速率:400MHz 非易失性存儲(chǔ)器:外部 片載 RAM:100kB 電壓 - I/O:2.50V，3.30V 電壓 - 內(nèi)核:1.20V 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:208-FBGA，CSPBGA 供應(yīng)商器件封裝:208-CSPBGA（17x17） 標(biāo)準(zhǔn)包裝:1,000
ADSP-BF536SBBC2Z300 制造商:Analog Devices 功能描述:
ADSP-BF536SBBC2Z400 制造商:Analog Devices 功能描述:
ADSP-BF537BBC-5A 功能描述:IC DSP CTLR 16BIT 182CSPBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號(hào)處理器） 系列:Blackfin® 標(biāo)準(zhǔn)包裝:2 系列:StarCore 類型:SC140 內(nèi)核 接口:DSI，以太網(wǎng)，RS-232 時(shí)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(yīng)商設(shè)備封裝:431-FCPBGA（20x20） 包裝:托盤(pán)
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