HT46R73D-3是盛群半导体(Holtek)公司推出的双斜率ADC 8位OTP MCU, 包含有4KB OTP 程序内存、128 B数据存储器、2个16位计时器及1个8位计时器，另具备Buzzer硬件输出功能。配有丰富及多样化的外围功能，特别适用于电桥式传感器的量测系统，可用来量测压力、温度、湿度变化的产品，如：体重计、压力计、温度计、湿度计、胎压计等。本文介绍了HT46R73D-3主要特性, 方框图, 桥接传感器输入的双斜率ADC连接图和典型应用电路.

The HT46R73D-3 is an 8-bit high performance, RISC architecture microcontroller device specifically designed for A/D with LCD applications that interface directly to analog signals, such as those from sensors.

The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, Dual slope A/D converter, LCD display, HALT and wake-up functions, watchdog timer, as well as low cost, enhance the versatility of these devices to suit for a wide range of AD with LCD application possibilities such as sensor signal processing, scales, consumer products, subsystem controllers, etc.

HT46R73D-3主要特性:

_ Operating voltage:

fSYS=4MHz: 2.2V~5.5V

fSYS=8MHz: 3.3V~5.5V

_ Three system oscillators:

External Crystal oscillator

External RC oscillator

Internal RC oscillator

_ Up to 16 bidirectional I/O lines

_ One external interrupt input shard with an I/O lines

_ One 8-bit and two 16-bit programmable timer/event counter with overflow interrupt a 8-stage pre-scalar

_ LCD driver with 16_4 segments

_ 4K_15 program memory

_ 128_8 data memory RAM

_ Single differential input channel dual slope Analog to Digital Converter with Operational Amplifier.

_ Watchdog Timer with regulator power

_ Buzzer output

_ Internal 12kHz RC oscillator

_ External 32.768kHz Crystal oscillator

_ HALT function and wake-up feature reduce power consumption

_ Voltage regulator (3.3V) and charge pump

_ Embeded voltage reference generator (1.5V)

_ 4-level subroutine nesting

_ Bit manipulation instruction

_ 15-bit table read instruction

_ Up to 0.5_s instruction cycle with 8MHz system clock at VDD=5V

_ 63 powerful instructions

_ All instructions in 1 or 2 machine cycles

_ Low voltage reset function

_ One vibration sensor input

_ Four touch-key inputs

_ 52-pin QFP package

图1.HT46R73D-3方框图


图2.HT46R73D-3输入/输出端口框图


图3.HT46R73D-3桥接传感器输入的双斜率ADC连接图

图4.HT46R73D-3应用电路图