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C8051F930低压MCU方案

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SiLab C8051F930 低压MCU方案

关键词:低压MCU,工业控制,医疗仪器,消费类电子,无线传感器,

摘要:Silicon Lab公司的C8051F9xx是业界首个能工作到低于 0.9V的MCU系列,可采用单电

池工作,从而大大延长了双电池工作的寿命. C8051F9xx是全集成的混合信号片上系统MCU,

它集成DC/DC转换器,能提供快速叫醒时间,低工作模式和超低睡眠模式的电流消耗.广泛应

用在手提个人医疗设备,遥控,手提音频和消费类电子产品,无线传感器和安全,工业监视和控

制等. 本文介绍了C8051F9xx 系列的主要特性和几种系列的方框图, 以及包括基于

C8051F931-based ToolStick 女儿板和Capacitive Touch Sense 女儿板在内的开发套件的

主要特性别和开发板的电路图.

Silicon Lab公司的C8051F9xx是业界首个能工作到低于 0.9V的MCU系列,可采用单电池工

作,从而大大延长了双电池工作的寿命. C8051F9xx是全集成的混合信号片上系统MCU,它集

成DC/DC转换器,能提供快速叫醒时间,低工作模式和超低睡眠模式的电流消耗.广泛应用在

手提个人医疗设备,遥控,手提音频和消费类电子产品,无线传感器和安全,工业监视和控制等.

本文介绍了C8051F9xx 系列的主要特性和几种系列的方框图, 以及包括基于

C8051F931-based ToolStick 女儿板和Capacitive Touch Sense 女儿板在内的开发套件的

主要特性别和开发板的电路图.

The C8051F9xx is the industry’s first MCU family capable of full-spec operation 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.

C8051F93x-C8051F92x devices are fully integrated mixed-signal System-on-a-Chip

MCUs. Highlighted features are listed below.

•Single/Dual Battery operation with on-chip dc-dc boost converter.

•High-speed pipelined 8051-compatible microcontroller core (up to 25 MIPS)

•In-system, full-speed, non-intrusive debug interface (on-chip)

•True 10-bit 300 ksps 23-channel single-ended ADC with analog multiplexer

•6-Bit Programmable Current Reference

•Precision programmable 24.5 MHz internal oscillator with spread spectrum

technology.

•64 kB or 32 kB of on-chip Flash memory

•4352 bytes of on-chip RAM

•SMBus/I2C, Enhanced UART, and two Enhanced SPI serial interfaces implemented

in hardware

•Four general-purpose 16-bit timers

•Programmable Counter/Timer Array (PCA) with three capture/compare modules and

Watchdog Timer function

•On-chip Power-On Reset, VDD Monitor, and Temperature Sensor

•Two On-chip Voltage Comparators with 23 Touch Sense inputs.

•24 or 16 Port I/O (5 V tolerant)

With on-chip Power-On Reset, VDD monitor, Watchdog Timer, and clock oscillator, the

C8051F93x-C8051F92x devices are truly stand-alone System-on-a-Chip solutions. The

Flash memory can be reprogrammed even in-circuit, providing non-volatile data storage,

and also allowing field upgrades of the 8051 firmware. User software has complete control

of all peripherals, and may individually shut down any or all peripherals for power savings.

The on-chip Silicon Labs 2-Wire (C2) Development Interface allows non-intrusive (uses

no on-chip resources), full speed, in-circuit debugging using the production MCU installed

in the final application. This debug logic supports inspection and modification of memory

and registers, setting breakpoints, single stepping, run and halt commands. All analog and

digital peripherals are fully functional while debugging using C2. The two C2 interface pins

can be shared with user functions, allowing in-system debugging without occupying

package pins.

Each device is specified for 0.9 to 1.8 V or 1.8 to 3.6 V operation over the industrial

temperature range (–40 to +85 °C). The Port I/O and

RST pins are tolerant of input signals

up to 5 V. The C8051F930/20 are available in 32-pin QFN or LQFP packages and the

C8051F931/21 are available in a 24-pin QFN package. Both package options are

lead-free and RoHS compliant.

Supply Voltage 0.9 to 3.6 V

-One-Cell Mode supports 0.9 to 1.8 V operation

-Two-Cell Mode supports 1.8 to 3.6 V operation

-Built-in dc-dc converter with 1.8 to 3.3 V output for use in one-cell mode

-Built-in LDO regulator allows a high analog supply voltage and low digital core

voltage

-2 built in brownout detectors

10-Bit Analog to Digital Converter

-±1 LSB INL; no missing codes

-Programmable throughput up to 300 ksps

-Up to 23 external inputs

-On-Chip 1.65 V ±TBD Voltage Reference

-On-Chip PGA allows measuring voltages up to twice the reference voltage.

-16-bit Auto-Averaging Accumulator with Burst Mode provides increased ADC

resolution.

-Data dependent windowed interrupt generator

-Built-in temperature sensor (±3 °C)

Two Comparators

-Programmable hysteresis and response time

-Configurable as wake-up or reset source

-Up to 23 Capacitive Touch Sense Inputs

6-Bit Programmable Current Reference

-Up to ±500 μA. Can be used as a bias or for generating a custom reference voltage.

On-Chip Debug

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