HT46R73D-3是盛群半導體(Holtek)公司推出的雙斜率ADC 8位OTP MCU, 包含有4KB OTP 程序內存、128 B數(shù)據(jù)存儲器、2個16位計時器及1個8位計時器，另具備Buzzer硬件輸出功能。配有豐富及多樣化的外圍功能，特別適用于電橋式傳感器的量測系統(tǒng)，可用來量測壓力、溫度、濕度變化的產品，如：體重計、壓力計、溫度計、濕度計、胎壓計等。本文介紹了HT46R73D-3主要特性, 方框圖, 橋接傳感器輸入的雙斜率ADC連接圖和典型應用電路.
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
圖1.HT46R73D-3方框圖
圖2.HT46R73D-3輸入/輸出端口框圖
圖3.HT46R73D-3橋接傳感器輸入的雙斜率ADC連接圖
圖4.HT46R73D-3應用電路圖
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