原标题：Lattice L-ASC10和Platform Manager 2硬件管理设计方案

　　lattice公司的Platform Manager 2和L-ASC10是系统可编程的硬件管理(电源,热和控制台)扩展器,能无缝地对电源电压和电流监测,温度监测,时序和裕度控制通路.器件包括支持监视信号状态和输出控制信号的专用接口和中央硬件管理控制器,主要用在通信和网络设备,工业控制,测试测量,医疗电子,存储设备和服务器.本文介绍了L-ASC10主要特性,ASC框图和硬件管理应用框图以及平台管理2评估板框图,电路图和材料清单.

　　The L-ASC10 (Analog Sense and Control - 10 rail) is a Hardware Management (Power, Thermal, and Control Plane Management) Expander designed to be used with Platform Manager 2 or MachXO2 FPGAs to implement the Hardware Management Control function in a circuit board. The L-ASC10 (referred to as ASC) enables seamless scaling of power supply voltage and current monitoring, temperature monitoring, sequence and margin control channels. The ASC includes dedicated interfaces supporting the exchange of monitor signal status and output control signals with these centralized hardware management controllers. Up to eight ASC devices can be used to implement a hardware management system. The ASC provides three types of analog sense channels: voltage (nine standard channels and one high voltage channel), current (one standard voltage and one high voltage), and temperature (two external and one internal)。

　　Each of the analog sense channels is monitored through two independently programmable comparators to support both high/low and in-bounds/out-of-bounds (window-com-pare) monitor functions. The current sense channels feature a programmable gain amplifier and a fast fault detect (<1 μs response time) for detecting short circuit events. The temperature sense channels can be configured to work with different external transistor or diode configurations. Nine general purpose 5 V tolerant open-drain digital input/ output pins are provided that can be used in a system for controlling DC-DC converters, low-drop-out regulators (LDOs) and optocouplers, as well as for supervisory and general purpose logic interface functions. Four high-voltage charge pumped outputs (HVOUT1-HVOUT4) may be con-figured as high-voltage MOSFET drivers to control high-side MOSFET switches. These HVOUT outputs can also be programmed as static output signals or as switched outputs (to support external charge pump implementation) operating at a dedicated duty cycle and frequency. The ASC device incorporates four TRIM outputs for control-ling the output voltages of DC-DC converters. Each power supply output voltage can be maintained typically within 0.5% tolerance across various load conditions using the Digital Closed Loop Control mode. The internal 10-bit A/D converter can be used to monitor the voltage and current through the I2C bus. The ADC is also used in the digital closed loop control mode of the trimming block.

　　The ASC also provides the capability of logging up to 16 status records into the on-chip nonvolatile EEPROM memory. Each record includes voltage, current and temperature monitor signals along with digital input and output levels. The dedicated ASC Interface (ASC-I/F) is a reliable serial channel used to communicate with a Platform Manager 2 or a MachXO2 FPGA in a scalable star topology. The centralized control algorithm in the FPGA monitors signal status and controls output behavior via this ASC-I/F. The ASC I2C interface is used by the FPGA or an external microcontroller for ASC background programming, interface configuration, and additional data transfer such as parameter measurement or I/O control or status. For example, voltage trim tar-gets can be set over the I2C bus and measured voltage, current, or temperature values can be read over the I2C bus. The ASC also includes an on-chip output control block (OCB) which allows certain alarms and control signals a direct connection to the GPIOs or HVOUTs, bypassing the ASC-I/F for a faster response. The OCB is used to connect the fast current fault detect signal to an FPGA input directly. It also supports functions like Hot Swap with a programmable hysteretic controller.

　　L-ASC10主要特性:

　　Ten Rail Voltage Monitoring and Measurement

　　• UV/OV Fault Detection Accuracy - 0.2% Typ.

　　• Fault Detection Speed <100 μs

　　• High Voltage, Single Ended and Differential Sensing 

　　Two Channel Wide-Range Current Monitoring and Measurement

　　• High-side current Measurement up to 12 V

　　• Programmable OC/UC Fault Detect

　　• Detects Current faults in < 1 μs 

　　Three Temperature Monitoring and Measurement Channels

　　• Programmable OT/UT Faults Threshold

　　• Two channels of Temperature Monitoring using external diodes

　　•One On-Chip Temperature Monitor

　　 Four High-Side MOSFET Drivers

　　• Programmable Charge Pump

　　 Four Precision Trim and Margin Channels

　　• Closed Loop Operation

　　• Voltage Scaling and VID Support

　　 Nine General Purpose Input / Output

　　• 5 V tolerant I/O

　　 Non-Volatile Fault Logging

　　 In-system Programmable Through I2C

　　• Non-Volatile Configuration

　　• Background Programming Support 

　　System Level Support

　　• 3.3 V Operation, wide input supply range 2.8 V to 3.6 V

　　• Industrial temperature range

　　• 48-pin QFN

　　•RoHS compliant and halogen-free

　　•High Reliability Systems 

　　L-ASC10应用:

　　• Telecommunication and Networking

　　• Industrial, Test & Measurement

　　• Medical Systems

　　• Servers and Storage Systems

　　图1.ASC框图

　　图2.硬件管理应用框图

　　平台管理2开发套件

　　The Platform Manager 2 Development Kit is a versatile, ready-to-use hardware platform for evaluating and designing with Platform Manager 2 and L-ASC10 devices. This kit includes a board, programming cable, and assorted example designs and documentation available for download. You can implement and debug your hardware management functions (power, thermal and control plane management) and test them out with this kit.

　　The Board - The core of the Platform Manager 2 Development Kit is the main board, featuring a combination of the LPTM21 and the L-ASC10 devices. Provisions are included on the board to emulate Power management functions (such as power supply monitoring, temperature monitoring, supply fault logging, margining & trimming, voltage scaling using VID), thermal management functions such as (temperature monitoring and measurement, fan speed control, power dissipation control and fault logging) and control plane functions (such as reset sequencing, I2C GPIO, level translation and JTAG chain management). The board also supports expansion of hardware management using ASC Evaluation Boards, featuring the L-ASC10 (available separately).

　　Platform Manager 2 Evaluation Board The Platform Manager 2 evaluation board is used to demonstrate, evaluate and design using the Platform Manager 2 (LPTM21) device and the Hardware Management Expander (L-ASC10) device. The board is pre-programmed with a demo design that highlights the features and flexibility of the LPTM21 and L-ASC10 devices. This demo operates on the board without any other software or hardware as described in the QuickSTART Guide that is included with the board. However, a more complete evaluation can be accomplished using the I2C demo / debugging software which is available from the Lattice website. This software and the demo design can be used to evaluate the following features provided by the Platform Manager 2 devices: Power Management (Power Sequencing, Voltage Monitoring, Trimming, Margining), Thermal Management (Temperature Monitoring, Fan Control, Power Control) and Control Plane (Reset Control, Fault Logging). The use of the software with the demo design is fully described in the user guide which is included with the software zip file: UG59, Platform Manager 2 I2C Demo Design and GUI User’s Guide

　　平台管理2评估板主要特性:

　　The Platform Manager 2 evaluation board has been designed to demonstrate and evaluate the following applications:

　　• Supply Voltage monitoring, sequencing, trimming, VID, and control.

　　• Current sensing, monitoring and control.

　　• Temperature sensing, monitoring and control.

　　• 3-Wire, 4 Wire Fan Control.

　　• Fault logging to internal UFM or external SPI Flash.

　　• Scalable monitoring and control of voltages, currents, temperatures.

　　• Field upgrades via background programming and dual boot.

　　• GPIO control and expansion.

　　The Platform Manager 2 evaluation board also allows the user to quickly learn, evaluate, develop and test their own designs using the LPTM21, L-ASC10 and surrounding circuits and components.

　　图3.平台管理2评估板外形图:正面

　　图4.平台管理2评估板外形图:背面

　　图5.平台管理2评估板框图(1)

　　图6.平台管理2评估板框图(2)

　　平台管理2评估板材料清单:

　　平台管理2评估板材料清单(未安装):