ST ST7LITE3冰箱MCU控制方案

ST的ST7LITE3xF2 是集成了单电压闪存,数据EEPROM,ADC,定时器,SPI的8位MCU,是ST7微控制器系列中一员.ST7是工业标准的8位内核,具有增强的指令集.它的闪存可在电路中进行编程(ICP)和在应用时编程(IAP),它的片内调试模块(DM)支持在电路中进行调试(ICD).本文介绍了ST7LITE3xF2的主要特性,方框图以及STEVAL-IHT001V1自动调温套件
的主要特性,详情的电路图和所用的元件清单(BOM).

ST7LITE3xF2 8-bit MCU with single voltage Flash, data EEPROM, ADC, timers, SPI, LINSCI

The ST7LITE3 is a member of the ST7 microcontroller family. All ST7 devices are based on a common industry-standard 8-bit core, featuring an enhanced instruction set.
The ST7LITE3 features FLASH memory with byte-by-byte In-Circuit Programming (ICP) and In- Application Programming (IAP) capability.
Under software control, the ST7LITE3 device can be placed in WAIT, SLOW, or HALT mode, reducing power consumption when the application is in idle or standby 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.

The devices feature an on-chip Debug Module (DM) to support in-circuit debugging (ICD). For a description of the DM registers, refer to the ST7 ICC Protocol Reference Manual.

ST7LITE3主要特性:

emories
8 Kbytes program memory: single voltage extended Flash (XFlash) Program memory with read-out protection, In-Circuit Programming and In-Application programming (ICP and IAP), data retention: 20 years at 55°C.
384 bytes RAM
256 bytes data EEPROM with read-out protection. 300K write/erase cycles guaranteed,
data retention: 20 years at 55°C.
Clock, Reset and Supply Management
Enhanced reset system
Enhanced low voltage supervisor (LVD) for main supply and an auxiliary voltage detector (AVD) with interrupt capability for implementing safe power-down procedures
Clock sources: Internal RC 1% oscillator, crystal/ceramic resonator or external clock
Optional x4 or x8 PLL for 4 or 8 MHz internal clock
Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt
I/O Ports
Up to 15 multifunctional bidirectional I/O lines
7 high sink outputs
5 Timers
Configurable Watchdog Timer
Two 8-bit Lite Timers with prescaler, 1 realtime base and 1 input capture
Two 12-bit Auto-reload Timers with 4 PWM outputs, input capture and output compare
functions
2 Communication Interfaces
Master/slave LINSCI™ asynchronous serial interface
SPI synchronous serial interface
Interrupt Management
10 interrupt vectors plus TRAP and RESET
12 external interrupt lines (on 4 vectors)
A/D Converter
7 input channels
10-bit resolution
Instruction Set
8-bit data manipulation
63 basic instructions with illegal opcode detection
17 main addressing modes
8 x 8 unsigned multiply instructions
Development Tools
Full hardware/software development package
DM (Debug module)



图1.ST7LITE3通用方框图