| Silicon Lab C8051F9xx低压MCU方案 |
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| 作者：Silicon 来源：中电网 点击数：174 更新时间：2008-4-8 |
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Silicon Lab公司的C8051F9xx低电压低功耗系列是业界首个能工作在0.9 V 到 3.6 V的MCU，直接用单节电池就能工作，大大地增长了两节电池的寿命。C8051F9xx还集成了64kB的闪存和4kB的RAM，10位300-ksps ADC以及快速叫醒的基准电压，smaRTClock定时模块以及多个内部振荡器选择，真正提供片上系统解决方案。C8051F9xx广泛用在手提个人医疗产品，遥控，手提音频设备，消费类电子，无线传感器，无线读表以及工业监视和控制。本文介绍了C8051F9xx的主要性能，方框图以及开发板的主要性能和详细的电路图。
The C8051F9xx product family is the industry’s first MCU family capable of operating down to 0.9 V and up to 3.6 V, enabling single-cell battery operation as well as dramatically increasing battery life for dual-cell applications. With an integrated dc-dc converter, the C8051F9xx has been designed to provide a fast wake-up time, low active-mode, and ultra-low sleep mode current consumptions. The C8051F9xx family not only provides high performance while saving power but also unprecedented functional density in a small footprint. The C8051F9xx is the first line of MCUs to integrate 64 kB of Flash and 4 kB of RAM into a 4 x 4 mm package while also integrating a 10-bit, 300-ksps analog-to-digital converter (ADC) with an internal fast wake-up voltage reference, a smaRTClock timing module, and multiple internal oscillator options to provide a true system-on-chip solution.
Lowest Voltage Operation
With an integrated dc-dc converter, the C8051F9xx family is the industry’s first MCU capable of operating down to 0.9 V, enabling single-cell battery operation and
dramatically increasing battery life for dual-cell applications, ultimately shrinking the form factor and cost of battery-powered products.
Greatest Power Efficiency
The C8051F9xx family is optimized in all operating modes to enable customers to
either move to a single-cell design or increase the system’s battery life by up to 2x in parallel dual-cell designs.
Highest Functional Density
With 64 kB of Flash and 4 kB of RAM in a 4 x 4 mm package, the C8051F9xx provides customers with increased memory for data-intensive applications.
The small form factor makes these devices ideal for applications where end-product
size is critical.
Maximize Battery Life
The C8051F9xx family is optimized to maximize power efficiency by enabling an ultra-low current sleep mode, a fast wake-up time, a fast settling time to support analog measurements, and a low active current mode, resulting in maximum battery life.
C8051F9xx 主要特性：
Single cell/dual-cell operation
One-cell mode supports 0.9 to 1.8 V operation
Dual-cell mode supports 1.8 to 3.6 V operation
Integrated high-efficiency dc-dc boost converter
Integrated low drop out (LDO) voltage regulator
Multiple internal oscillators
smaRTClock oscillator
Low power 20 MHz oscillator
Precision 24.5 MHz oscillator with spread spectrum mode
Ultra-low current sleep mode and fast wake
25 MHz, single-cycle 8051 compatible CPU with low active-mode current
Unprecedented functional density
64 kB Flash memory
4 kB of RAM
4 x 4 mm package
Burst mode 10-bit ADC with internal fast start-up VREF
Capacitive touch sense support
Two on-chip voltage comparators
Up to 23 capacitive touch sense inputs
主要应用：
Portable personal medical products
Remote controls
Portable audio
Consumer electronics
Wireless sensors and security
Wireless meter reading
Industrial monitoring and control
图1. C8051F9xx方框图
The C8051F930 Development Kit is intended as a development platform for the microcontrollers in the C8051F93x-C8051F92x MCU family. The members of this MCU family are C8051F930, C8051F931, C8051F920, and C8051F921.
开发套件所包含内容：
The C8051F930 Development Kit contains the following items:
C8051F930 Target Board
C8051Fxxx Development Kit Quick-Start Guide
Silicon Laboratories IDE and Product Information CD-ROM. CD content includes the following:
Silicon Laboratories Integrated Development Environment (IDE)
Keil 8051 Development Tools (macro assembler, linker, evaluation C compiler)
Source code examples and register definition files
Documentation
C8051F930 Development Kit User’s Guide (this document)
AC to DC Power Adapter
USB Debug Adapter (USB to Debug Interface)
2 USB Cables
2 AAA Batteries
图2. C8051F930 目标板外形图
图3. C8051F9xx开发板电路图（1）
图4. C8051F9xx开发板电路图（2）
图5. C8051F9xx开发板电路图（3）[1]
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