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| 型号： | EVAL-ADUC7039QSPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 43/92页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADUC7039 |
| 设计资源： | ADuC7039QSPZ Gerber Files EVAL-ADuC7039 Schematic & Brd Outline |
| 标准包装： | 1 |
| 系列： | QuickStart™ PLUS 套件 |
| 类型： | MCU |
| 适用于相关产品： | ADuC7039 |
| 所含物品： | 板 |
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ADuC7039
Data Sheet
Rev. D | Page 48 of 92
POWER SUPPLY SUPPORT CIRCUITS
The ADuC7039 integrates two on-chip, low dropout (LDO)
regulators that are driven directly from the battery voltage to
generate a 2.6 V internal supply. This 2.6 V supply is then used
as the supply voltage for the ARM7 MCU and peripherals
including the precision analog circuits on-chip.
The digital LDO functions with two external capacitors in
parallel, on REG_DVDD, whereas, the analog LDO functions
with an external capacitor (0.47 μF) on REG_AVDD.
The ESR of the output capacitor affects stability of the LDO
control loop. An ESR of 5 Ω or less for frequencies above 32 kHz
is recommended to ensure the stability of the regulators.
Power-on-reset (POR), and low voltage flag (LVF) functions are
also integrated to ensure safe operation of the MCU as well as
continuous monitoring of the battery power supply. The POR
circuit is designed to operate with a VDD power-on time (0 V
to 12 V), of greater than 100 μs. It is, therefore, recommended
to carefully select external power supply decoupling compo-
nents to ensure that the VDD supply, power-on time, can
always be guaranteed to be greater than 100 μs. The series
resistor and decoupling capacitor combination on VDD should
be chosen to ensure an RC time constant of at least 100 μs, for
example 10 Ω and 10 μF as shown in Figure 33.
As shown in Figure 19, once the supply voltage (on VDD),
reaches a minimum operating voltage of 3 V, a POR signal
keeps the ARM core in reset for 20 ms. This ensures that the
regulated power supply voltage (REG_DVDD) supplied to the
ARM core and associated peripherals, is above the minimum
operational voltage to guarantee full functionality. A POR flag
is set in the RSTSTA MMR to indicate a POR reset event has
occurred.
At voltages below the POR level, an additional low voltage flag
can be enabled (HVCFG[2]). It can be used to indicate that the
contents of the SRAM remain valid after a reset event. The
operation of the low voltage flag is shown in Figure 19. When
enabled, the status of this bit can be monitored via HVSTA[2].
If this bit is set, then the SRAM contents are valid. If this bit is
cleared, then the SRAM contents can be corrupted.
Figure 19. Typical Power-On Cycle
VDD
3V TYP
12V
2.6V
POR TRIP 3.0V TYP
LVF TRIP 2.1V TYP
REG_DVDD
POR_TRIP
RESET (INTERNAL
ACTIVE LOW RESET
SIGNAL)
ENABLE_LVF
20ms TYP
08
46
3-
0
18
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| EVAL-ADUC7060QSPZ | 功能描述:KIT DEV QUICK START ADUC7060 RoHS:是 类别:编程器，开发系统 >> 通用嵌入式开发板和套件（MCU、DSP、FPGA、CPLD等） 系列:QuickStart™ PLUS 套件 产品培训模块:Blackfin® Processor Core Architecture Overview Blackfin® Device Drivers Blackfin® Optimizations for Performance and Power Consumption Blackfin® System Services 特色产品:Blackfin? BF50x Series Processors 标准包装:1 系列:Blackfin® 类型:DSP 适用于相关产品:ADSP-BF548 所含物品:板，软件，4x4 键盘，光学拨轮，QVGA 触摸屏 LCD 和 40G 硬盘 配用:ADZS-BFBLUET-EZEXT-ND - EZ-EXTENDER DAUGHTERBOARDADZS-BFLLCD-EZEXT-ND - BOARD EXT LANDSCAP LCD INTERFACE 相关产品:ADSP-BF542BBCZ-4A-ND - IC DSP 16BIT 400MHZ 400CSBGAADSP-BF544MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF542KBCZ-6A-ND - IC DSP 16BIT 600MHZ 400CSBGAADSP-BF547MBBCZ-5M-ND - IC DSP 16BIT 533MHZ MDDR 400CBGAADSP-BF548BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF547BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF544BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGAADSP-BF542BBCZ-5A-ND - IC DSP 16BIT 533MHZ 400CSBGA |
| EVAL-ADUC7060QSPZU1 | 制造商:Analog Devices 功能描述: |
| EVALADUC7060QSPZU2 | 制造商:Analog Devices 功能描述:QUICK START DEVELOPMENT SYSTEM - Boxed Product (Development Kits) |
| EVAL-ADUC7061MKZ | 功能描述:开发板和工具包 - ARM Quick Start Development System RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| EVAL-ADUC7061MKZ | 制造商:Analog Devices 功能描述:ADUC7061MKZ EvaluationBoard |
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