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| 型號： | ADSP-BF537BBC-5A |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 6/68頁 |
| 文件大小： | 0K |
| 描述： | IC DSP CTLR 16BIT 182CSPBGA |
| 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 |
| 標準包裝： | 1 |
| 系列： | Blackfin® |
| 類型： | 定點 |
| 接口： | CAN，SPI，SSP，TWI，UART |
| 時鐘速率： | 500MHz |
| 非易失內(nèi)存： | 外部 |
| 芯片上RAM： | 132kB |
| 電壓 - 輸入/輸出： | 2.50V，3.30V |
| 電壓 - 核心： | 1.26V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 182-LFBGA，CSPBGA |
| 供應(yīng)商設(shè)備封裝： | 182-CSPBGA（12x12） |
| 包裝： | 托盤 |
| 配用： | ADZS-BF537-ASKIT-ND - BOARD EVAL SKIT ADSP-BF537 ADZS-BFAUDIO-EZEXT-ND - BOARD EVAL AUDIO BLACKFIN ADZS-BF537-EZLITE-ND - BOARD EVAL ADSP-BF537 ADZS-BFAV-EZEXT-ND - BOARD DAUGHT ADSP-BF533,37,61KIT ADZS-BF537-STAMP-ND - SYSTEM DEV FOR ADSP-BF537 |
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Rev. J
|
Page 14 of 68
|
February 2014
Hibernate State—Maximum Static Power Savings
The hibernate state maximizes static power savings by disabling
the voltage and clocks to the processor core (CCLK) and to all of
the synchronous peripherals (SCLK). The internal voltage regu-
lator for the processor can be shut off by writing b#00 to the
FREQ bits of the VR_CTL register. This disables both CCLK
and SCLK. Furthermore, it sets the internal power supply volt-
age (VDDINT) to 0 V to provide the greatest power savings. To
preserve the processor state, prior to removing power, any criti-
cal information stored internally (memory contents, register
contents, etc.) must be written to a nonvolatile storage device.
Since VDDEXT is still supplied in this state, all of the external pins
three-state, unless otherwise specified. This allows other devices
that are connected to the processor to still have power applied
without drawing unwanted current.
The Ethernet or CAN modules can wake up the internal supply
regulator. If the PH6 pin does not connect as the PHYINT sig-
nal to an external PHY device, it can be pulled low by any other
device to wake the processor up. The regulator can also be
woken up by a real-time clock wake-up event or by asserting the
RESET pin. All hibernate wake-up events initiate the hardware
reset sequence. Individual sources are enabled by the VR_CTL
register.
With the exception of the VR_CTL and the RTC registers, all
internal registers and memories lose their content in the hiber-
nate state. State variables can be held in external SRAM or
SDRAM. The SCKELOW bit in the VR_CTL register provides a
means of waking from hibernate state without disrupting a self-
refreshing SDRAM, provided that there is also an external pull-
down on the SCKE pin.
Power Savings
As shown in Table 5, the processors support three different
power domains which maximizes flexibility, while maintaining
compliance with industry standards and conventions. By isolat-
ing the internal logic of the processor into its own power
domain, separate from the RTC and other I/O, the processor
can take advantage of dynamic power management, without
affecting the RTC or other I/O devices. There are no sequencing
requirements for the various power domains.
The dynamic power management feature allows both the pro-
cessor’s input voltage (VDDINT) and clock frequency (fCCLK) to be
dynamically controlled.
The power dissipated by a processor is largely a function of its
clock frequency and the square of the operating voltage. For
example, reducing the clock frequency by 25% results in a 25%
reduction in power dissipation, while reducing the voltage by
25% reduces power dissipation by more than 40%. Further,
these power savings are additive, in that if the clock frequency
and supply voltage are both reduced, the power savings can be
dramatic, as shown in the following equations.
The power savings factor (PSF) is calculated as:
where:
fCCLKNOM is the nominal core clock frequency
fCCLKRED is the reduced core clock frequency
VDDINTNOM is the nominal internal supply voltage
VDDINTRED is the reduced internal supply voltage
tNOM is the duration running at fCCLKNOM
tRED is the duration running at fCCLKRED
The percent power savings is calculated as
VOLTAGE REGULATION
The ADSP-BF534/ADSP-BF536/ADSP-BF537 processors pro-
vide an on-chip voltage regulator that can generate appropriate
Conditions on Page 23 for regulator tolerances and acceptable
VDDEXT ranges for specific models.
Figure 5 shows the typical external components required to
complete the power management system. The regulator con-
trols the internal logic voltage levels and is programmable with
the voltage regulator control register (VR_CTL) in increments
of 50 mV. To reduce standby power consumption, the internal
voltage regulator can be programmed to remove power to the
processor core while keeping I/O power supplied. While in
Table 5. Power Domains
Power Domain
VDD Range
All internal logic, except RTC
VDDINT
RTC internal logic and crystal I/O
VDDRTC
All other I/O
VDDEXT
Figure 5. Voltage Regulator Circuit
PSF
fCCLKRED
fCCLKNOM
---------------------
VDDINTRED
VDDINTNOM
--------------------------
2
tRED
tNOM
-----------
=
% power savings
1
PSF
–
100%
=
VDDEXT
(LOW-INDUCTANCE)
VDDINT
VROUT
100μF
VROUT
GND
SHORT AND LOW-
INDUCTANCE WIRE
VDDEXT
+
100μF
10μF
LOW ESR
100nF
SET OF DECOUPLING
CAPACITORS
FDS9431A
ZHCS1000
NOTE: DESIGNER SHOULD MINIMIZE
TRACE LENGTH TO FDS9431A.
10μH
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADSP-BF537BBC-5AV | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADSP-BF537BBCZ-5A | 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC Blackfin processor 500MHz 132KB SRAM RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT |
| ADSP-BF537BBCZ-5A | 制造商:Analog Devices 功能描述:Digital Signal Processor IC |
| ADSP-BF537BBCZ-5AV | 功能描述:IC DSP CTLR 16BIT 182CSPBGA RoHS:是 類別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號處理器） 系列:Blackfin® 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(yīng)商設(shè)備封裝:431-FCPBGA（20x20） 包裝:托盤 |
| ADSP-BF537BBCZ-5AV | 制造商:Analog Devices 功能描述:Digital Signal Processor IC |
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