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基于EFM8LB/Si5040的小型低成本10G XFP光模块解决方案

2018-01-12
类别:工业控制
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文章创建人 拍明

概述

光模块光纤通信中的重要器件,主要由光接收功能、光发射功能、数字诊断功能三部分组成,实现了光信号转电信号和电信号转光信号的功能,在数据通信、传输网络、存储网、云计算等领域都有广泛的应用。本方案推荐的器件主要为高集成度的MCU、CDR等产品,因而体积更加小型化,有效的控制了成本。


    优势

  • 可实现数字诊断功能的EFM8LB系列8位MCU,主频可以达到72MHz,集成有14位精度的ADC,4路12位精度的DAC及硬件高速I2C外设(最高速度可达3.4Mbps),内部FLASH可以实现EEPROM功能,可节省外部的EEPROM,进一步缩小产品的体积,小封装(QFN24 3*3mm);

【EFM8LB】

EFM8 Laser Bee 8 位微控制器 (MCU)

Laser Bee EFM8 微控制器 (MCU) 系列由一系列可在高达 72 MHz 条件下运行的模拟密集型 MCU 组成。这些 MCU 可在 3 × 3 mm 的极小封装内提供包括 14 位 ADC、12 位 DAC、±3°C 温度传感器和高速通信外围设备等在内的高性能模拟,因而成为需要高性能模拟的应用的理想选择。

特点

流水线式 8 位 C8051 核心,最大工作频率达 72 MHz

一个多达 20 个通道的 14 位 900 ksps 模数转换器 (ADC)

多达四个 12 位 200 ksps 数模转换器 (DAC)

±3°C(-20°C 至 85°C)精度的集成式温度传感器

两个带内置 6 位 DAC 的低电流模拟比较器

最多 24 个一体机、5 V 容差 I/O 引脚

UART、SPI、SMBus 和高速 I²C 从机

优先级交叉开关和可配置的逻辑单元可实现灵活引脚功能

16 位通用计时器

EFM8LB系列

EFM8LB10F16E-QFN24

EFM8LB10F16E-QFN32

EFM8LB10F16E-QFP32

EFM8LB10F16E-QSOP24

EFM8LB11F16E-QFN24

EFM8LB11F16E-QFN32

EFM8LB11F16E-QFP32

EFM8LB11F16E-QSOP24

EFM8LB11F32E-QFN24

EFM8LB11F32E-QFN32

EFM8LB11F32E-QFP32

EFM8LB11F32E-QSOP24

EFM8LB12F32E-QFN24

EFM8LB12F32E-QFN32

EFM8LB12F32E-QFP32

EFM8LB12F32E-QSOP24

EFM8LB12F64E-QFN24

EFM8LB12F64E-QFN32

EFM8LB12F64E-QFP32

EFM8LB12F64E-QSOP24

EFM8 Laser Bee Family EFM8LB1 Data Sheet

The EFM8LB1, part of the Laser Bee family of MCUs, is a performanceline of 8-bit microcontrollers with a comprehensive analogand digital feature set in small packages.

These devices offer state-of-the-art performance by integrating 14-bit ADC, internalcalibrated temperature sensor (±3 °C), and up to four 12-bit DACs into small packages,making them ideal for the most stringent analog requirement applications. With an efficient,pipelined 8051 core with maximum operating frequency at 72 MHz, various communicationinterfaces, and four channels of configurable logic, the EFM8LB1 faly isoptimal for many embedded applications.

EFM8LB1 .png

EFM8LB1 applications include the following:

• Optical network modules

• Precision instrumentation

• Industrial control and automation

• Smart sensors

KEY FEATURES

• Pipelined 8-bit 8051 MCU Core with72 MHz operating frequency

• Up to 29 multifunction I/O pins

• One 14-bit, 900 ksps ADC

• Up to four 12-bit DACs withsynchronization and PWM capabilities

• Two low-current analog comparators withbuilt-in reference DACs

• Internal calibrated temperature sensor(±3 °C)

• Internal 72 MHz and 24.5 MHz oscillatorsaccurate to ±2%

• Four channels of Configurable Logic

• 6-channel PWM / PCA

• Six 16-bit general-purpose timers

Feature List

The EFM8LB1 device family are fully integrated, mixed-signal system-on-a-chip MCUs. Highlighted features are listed below.

• Core:

• Pipelined CIP-51 Core

• Fully compatible with standard 8051 instruction set

• 70% of instructions execute in 1-2 clock cycles

• 72 MHz maximum operating frequency

• Memory:

• Up to 64 kB flash memory (63 kB user-accessible), in-systemre-programmable from firmware in 512-byte sectors

• Up to 4352 bytes RAM (including 256 bytes standard 8051RAM and 4096 bytes on-chip XRAM)

• Power:

• Internal LDO regulator for CPU core voltage

• Power-on reset circuit and brownout detectors

• I/O: Up to 29 total multifunction I/O pins:

• Up to 25 pins 5 V tolerant under bias

• Selectable state retention through reset events

• Flexible peripheral crossbar for peripheral routing

• 5 mA source, 12.5 mA sink allows direct drive of LEDs

• Clock Sources:

• Internal 72 MHz oscillator with accuracy of ±2%

• Internal 24.5 MHz oscillator with ±2% accuracy

• Internal 80 kHz low-frequency oscillator

• External CMOS clock option

• External crystal/RC oscillator (up to 25 MHz)

• Analog:

• 14/12/10-Bit Analog-to-Digital Converter (ADC)

• Internal calibrated temperature sensor (±3 °C)

• 4 x 12-Bit Digital-to-Analog Converters (DAC)

• 2 x Low-current analog comparators with adjustable reference

• Communications and Digital Peripherals:

• 2 x UART, up to 3 Mbaud

• SPI™ Master / Slave, up to 12 Mbps

• SMBus™/I2C™ Master / Slave, up to 400 kbps

• I2C High-Speed Slave, up to 3.4 Mbps

• 16-bit CRC unit, supporting automatic CRC of flash at 256-byte boundaries

• 4 Configurable Logic Units

• Timers/Counters and PWM:

• 6-channel Programmable Counter Array (PCA) supportingPWM, capture/compare, and frequency output modes

• 6 x 16-bit general-purpose timers

• Independent watchdog timer, clocked from the low frequencyoscillator

• On-Chip, Non-Intrusive Debugging

• Full memory and register inspection

• Four hardware breakpoints, single-stepping

• Pre-programmed UART or SMBus bootloader

With on-chip power-on reset, voltage supply monitor, watchdog timer, and clock oscillator, the EFM8LB1 devices are truly standalonesystem-on-a-chip solutions. The flash memory is reprogrammable in-circuit, providing nonvolatile data storage and allowing field upgradesof the firmware. The on-chip debugging interface (C2) allows non-intrusive (uses no on-chip resources), full speed, in-circuitdebugging using the production MCU installed in the final application. This debug logic supports inspection and modification of memoryand registers, setting breakpoints, single stepping, and run and halt commands. All analog and digital peripherals are fully functionalwhile debugging. Device operation is specified from 2.2 V up to a 3.6 V supply. Devices are available in 4x4 mm 32-pin QFN, 3x3 mm24-pin QFN, 32-pin QFP, or 24-pin QSOP packages. All package options are lead-free and RoHS compliant.

  • 采用Si5040实现CDR功能,芯片内部集成有LA(限幅放大器),低功耗(功耗只有575mW),小封装(封装大小为5*5mm LGA)。

Si5040.png

Si5040.png


【Si5040】

Features

Complete, high-performance, low-power, 10 Gbps XFP transceiver featuringindependent CDRs, DSPLL®-based jitter-attenuating CMUs, and data retimers in bothtransmit and receive directions

> DSPLL-based, jitter-attenuating CMUsin both transmit and receive directions

> Frequency-agile jitter filtering from 9.8 to11.35 Gbps (continuous)

> Compliant to XFP specifications andjitter specifications for telecom(SONET/SDH, OTU-2) and datacom(10 GbE/10 GbE+FEC and10 GFC/10 GFC+FEC) applications

> Supports referenceless operation

> Integrated limiting amplifier providesbetter than 8 mV receiver sensitivity

> User-programmable receiver loss-ofsignal(LOS) detector

> Transmitter jitter generation 2.5 mUIrms(typical)

> Automatic slicing level adjustment withoptional programmable override

> Programmable sample phaseadjustment

> Line loopback, XFI loopback, patterngeneration, and pattern check testcapabilities

> 1.8/3.3 V or single 1.8 V supply

> 575 mW (typ) power dissipation

> 5x5 mm LGA package

> Serial microcontroller interface control

Applications

> XFP telecom modules

> XFP datacom modules

> Optical test equipment

> Jitter-attenuation and signal regeneration of 10 Gbps serial signalon line cards

Description

The Si5040 is a complete, low-power, high-performance XFP transceiver suitable formultiple XFP module types, from short-reach datacom to long-reach telecomapplications. The Si5040 integrates a rate-agile, programmable-bandwidth, jitterattenuatingCMU in the transmit direction, which significantly attenuates jitter present atthe XFI interface and on the applied reference clock, removing the need for an externaljitter cleanup circuit. The device supports referenceless operation or operation with asynchronous or asynchronous reference clock. The device can be completely configuredthrough a serial microcontroller interface. The Si5040 is compliant with all XFPrequirements in both datacom and telecom applications. The Si5040 is packaged in a5x5 mm LGA package and dissipates 575 mW (typ).

Functional Block Diagram

Si5040.png



  

小型低成本10G XFP光模块优选器件方案.png

  【光模块】

  光模块(optical module)由光电子器件、功能电路和光接口等组成,光电子器件包括发射和接收两部分。

  简单的说,光模块的作用就是光电转换,发送端把电信号转换成光信号,通过光纤传送后,接收端再把光信号转换成电信号。

  发射部分是:输入一定码率的电信号经内部的驱动芯片处理后驱动半导体激光器(LD)或发光二极管(LED)发射出相应速率的调制光信号,其内部带有光功率自动控制电路,使输出的光信号功率保持稳定。接收部分是:一定码率的光信号输入模块后由光探测二极管转换为电信号。经前置放大器后输出相应码率的电信号。




责任编辑:Davia

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标签: XFP 光模块 8位MCU

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