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):
