ST 基于ST7 MCU的嵌入网络服务器评估方案

ST公司的STEVAL-CDE001V1是采用ST7的嵌入式网络服务器,提供-55度C到150度C的温度测量和以太网接口,2x16点阵LCD模块接口,用于测试的SCI接口和用来存储网页的1MB串行闪存.本文介绍了ST72F321M Flash 和ST72321BM ROM MCU的主要特性,方框图,以及嵌入式网络服务器评估板的主要特性, 所采用的主要器件和详细电路图与材料清单.

STEVAL-CDE001V1 Embedded web server based on ST7

The ST72F321M Flash and ST72321BM ROM devices are members of the ST7 microcontroller family designed for mid-range applications. All devices are based on a common industrystandard 8-bit core, featuring an enhanced instruction set and are available with FLASH or ROM program memory.

Under software control, all devices can be placed in WAIT, SLOW, ACTIVE-HALT or HALT mode, reducing power consumption when the application is in idle or stand-by state. The enhanced instruction set and addressing modes of the ST7 offer both power and flexibility to software developers, enabling the design of highly efficient and compact application code. In addition to standard 8-bit data management, all ST7 microcontrollers feature true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes.

ST72F321M主要特性:

Memories

32K to 60K dual voltage High Density Flash (HDFlash) or ROM with read-out protection capability. In-Application Programming and In-Circuit Programming for HDFlash devices

1K to 2K RAM

HDFlash endurance: 100 cycles, data retention: 20 years at 55℃

Clock, Reset And Supply Management

Enhanced low voltage supervisor (LVD) for main supply and auxiliary voltage detector (AVD) with interrupt capability

Clock sources: crystal/ceramic resonator oscillators, internal RC oscillator and bypass for external clock

PLL for 2x frequency multiplication

Four power saving modes: Halt, Active-Halt, Wait and Slow

Interrupt Management

Nested interrupt controller

14 interrupt vectors plus TRAP and RESET

Top Level Interrupt (TLI) pin

15 external interrupt lines (on 4 vectors)

Up to 64 I/O Ports

64 multifunctional bidirectional I/O lines

34 alternate function lines

16 high sink outputs

5 Timers

Main Clock Controller with: Real time base, Beep and Clock-out capabilities

Configurable watchdog timer

Two 16-bit timers with: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes

8-bit PWM Auto-Reload timer with: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock withevent detector

4 Communications Interfaces

SPI synchronous serial interface

SCI asynchronous serial interface

I2C multimaster interface (SMbus V1.1 compliant)

Analog periperal (low current coupling)

10-bit ADC with 16 input robust input ports

Instruction Set

8-bit Data Manipulation

63 Basic Instructions

17 main Addressing Modes

8 x 8 Unsigned Multiply Instruction

Development Tools

Full hardware/software development package

In-Circuit Testing capability



图1.ST72F321M 方框图

嵌入式网络服务器评估板

This evaluation board offers a temperature display via an LCD on the board and on a webpage via an Ethernet connection. The board acts as a server to provide temperature information on a webpage displayed at the client end. It is also able to measure the temperature from a remote region and send it to a computer unit. It thus provides the solution for central server-based temperature measurement of various terminals as in applications such us air conditioning control in the industrial sector and hospitals.

嵌入式网络服务器主要特性:

Provides temperature measurements in the range of -55℃ to 150℃

Ethernet interface to the webpage-based temperature display on computer terminal

2 x 16-dot matrix LCD module interface

Switches are provided for user interface

10-pin ICC programming/debugging connector

SCI interface for testing purposes

1 Mbyte serial Flash for storage of webpages having larger memory requirements

嵌入式网络服务器所采用的主要器件:

ST72F321M9T6
ST232ABDR
ST662ABD-TR
LM235Z
ST2378ETTR
STM1001TWX6F
KF33BD-TR
2STR2215



图2.嵌入式网络服务器外形图



图3.嵌入式网络服务器电路图(1)



图4.嵌入式网络服务器电路图(2)



图5.嵌入式网络服务器电路图(3)



图6.嵌入式网络服务器电路图(4)

嵌入式网络服务器材料清单(BOM):