Holtek HT82A824R高性能i

1、holtek ht82a824r高性能iholtek公司的ht82a824r是高性能喇叭otp ,集成了usb 2.0全速兼容sie及符合微軟whql要求之高性能數(shù)字模擬轉(zhuǎn)換器與功率和微控制器.器件采納holtek(盛群)八位微控制器為其核心，可提供8kx16之程序內(nèi)存容量、864x8數(shù)據(jù)存儲器以及512x8的只讀數(shù)據(jù)存儲器，并提供halt命令。其操作為4.0v5.5v，系統(tǒng)頻率最高可達(dá)16mhz，同時可提供21條i/o,主要用在i-phone/i-pod/i-pad docking產(chǎn)品.本文介紹了ht82a824r主要特性,方框圖和應(yīng)用.ht82a824r高性能usb喇叭微控制器this h

2、t82a824r is an 8-bit high performance risc microcontroller designed for usb speaker related product applications. the ht82a824r combines a 16-bit , 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

3、 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 all

4、ows 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 featuresusb 2.0 full speed compatibleusb spec v1.1 full speed operation and usb audio device class spec v1.0operating voltage at fsys =

5、 6m/12mhz: 4.0v5.5v48khz/44.1khz sampling rate for audio playback selected by softwareembedded class ab power amplifier for ear phone speaker driving (32)×2embedded high performance 16-bit stereo audio sigma-delta dacpass microsoft dtm (whql) usb audio deviceaudio playback digital volume contro

6、l6 endpoints supported including endpoint 0support 1 control, 2 interrupts, 1 isochronous and 2 bulk transfersone hardware implemented isochronous transfertotal fifo size are 528 bytes (8, 8, 384, 32, 32, 64 for ep0ep2,ep4ep6)8192×16 program memory352×8 mcu type data memory ram (bank 0, ba

7、nk 9)128×8×4 speaker output data or 12-bit converted data ram (bank1, bank2, bank3, bank4)usb audio and 12-bit adc stereo data capture dma128×8×4 mcu type general purpose data ram (bank5, bank6, bank7, bank8)6-channel 12-bit a/d converter2-channel function shared with pb2pb3dual

8、programmable attenuator for 2-channel external stereo audio inputuniversal asynchronous receiver transmitter (uart) shared with pb0pb1spi interface (master and slave mode) shared with pc4pc7programmable frequency divider (pfd) function shared with pc0power-down function and wake-up reduce power consumptionup to 21 bidirectional i/o linesdual 16-bit programmable timer/event counters with overflow interruptswatchdog timer16-level subroutine nestingbit manipulation instruction16-bit table read instruction63 powerful instr