Holtek HT82A824R高性能i-Phone USB喇叭解决方案
Holtek公司的HT82A824R是高性能USB喇叭OTP MCU,集成了USB 2.0全速兼容SIE及符合微软WHQL要求之高性能数字模拟转换器与功率放大器和嵌入式微控制器.器件采用Holtek(盛群)八位微控制器为其核心，可提供8Kx16之程序内存容量、864x8数据存储器以及512x8的只读数据存储器，并提供HALT指令。其操作电压为4.0V~5.5V，系统频率最高可达16MHz，同时可提供21条I/O,主要用在i-Phone/i-Pod/i-Pad Docking产品.本文介绍了HT82A824R主要特性,方框图和应用电路.
HT82A824R高性能USB喇叭微控制器
This HT82A824R is an 8-bit high performance RISC microcontroller designed for USB Speaker related product applications. The HT82A824R combines a 16-bit DAC, USB transceiver, SIE (Serial Interface Engine), audio class processing unit, FIFO, 8-bit MCU into a single chip. The Sigma-Delta DAC in the HT82A824R is operating at the 48kHz or 44.1kHz sampling rate. The HT82A824R has a digital programmable gain amplifier. The gain range is from -32dB to +6dB. The external stereo audio input can be the other source of power amplifier by software control.
The HT82A824R has a Human Interface Device function that allows a user to control the playback volume at the device side. The HT82A824R also can mute the analog output signal by the operation of HID buttons.
HT82A824R主要特性:
CPU Features
●●USB 2.0 Full Speed Compatible
..
