Holtek HT56R66 MCU应用方案

Holtek(盛群半导体)的HT56R6x/HT56R6xx是8位TinyPower^TM A/D MCU with LCD系列, 具有超低功耗、快速唤醒、多重时钟讯号来源及多种工作模式等特点，具有完整性和多样化的功能，包含有2K~32K Word OTP程序内存、128~2304 Byte数据存储器、6~12 Level Stack等核心规格，同时兼具实用的外围电路, 很容易构成一个完整的微控制系统,大幅降低整体使用功耗，达到绿色环保的需求。适用于各种量测仪表、水表、气表、各式家电产品、运动表头、智能卡卡片阅读机等产品。本文介绍了HT56R6x/HT56R6xx系列的主要特性,方框图以及HT56R66和HT56R666的应用电路图.

These TinyPowerTM A/D Type with LCD 8-bit high performance RISC architecture microcontrollers are specifically, designed for applications that interface directly to analog signals and which require an LCD or LED interface.

The devices include an integrated multi-channel Analog to Digital Converter, Pulse Width Modulation outputs and an LCD/LED driver.

With their fully integrated SPI and I2C functions, designers are provided with a means of easy communication with external peripheral hardware. The benefits of integrated A/D, LCD, and PWM functions, in addition to low power consumption, high performance, I/O flexibility and low-cost, provides the device with the versatility for a wide range of products in the home appliance and industrial application areas. Some of these products could include electronic metering, environmental monitoring, handheld instruments, electronically controlled tools, motor driving in addition to many others.

The unique Holtek TinyPower technology also gives the devices extremely low current consumption characteristics, an extremely important consideration in the present trend for low power battery powered applications. The usual Holtek MCU features such as power down and wake-up functions, oscillator options, programmable frequency divider, etc. combine to ensure user applications require a minimum of external components.

主要特性:

_ Operating voltage:

fSYS=32768Hz: 2.2V~5.5V

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.0V~5.5V

fSYS=12MHz: 4.5V~5.5V

_ Operating current:

fSYS=1MHz at 3V: 170_A, typ.

fSYS=32kHz at 3V: 6_A, typ.

_ OTP Program Memory: 16K_16

_ RAM Data Memory: 1152_8

_ 24 to 32 bidirectional I/O lines

_ TinyPower technology for low power operation

_ Three pin-shared external interrupts lines

_ Multiple programmable Timer/Event Counters with overflow interrupt and 7-stage prescaler

_ External Crystal, RC and 32768 XTAL oscillators

_ Fully integrated RC 32kHz oscillator

_ Externally supplied system clock option

_ Watchdog Timer function

_ PFD/Buzzer for audio frequency generation

_ Dual Serial Interfaces: SPI and I2C

_ LCD and LED driver function

_ 4 operating modes: normal, slow, idle and sleep

_ 8-channel 12-bit resolution A/D converter

_ 4-channel 12-bit PWM outputs

_ Low voltage reset function: 2.1V, 3.15V, 4.2V

_ Low voltage detect function: 2.2V, 3.3V, 4.4V

_ Bit manipulation instruction

_ Table read instructions

_ 63 powerful instructions

_ Up to 0.33_s instruction cycle with 12MHz system clock at VDD=5V

_ 12 levels subroutine nesting

_ All instructions executed in one or two machine cycles

_ Power down and wake-up functions to reduce power consumption

_ Wide range of available package types


图1.方框图




图2. HT56R66应用电路


图3. HT56R666应用电路