HT82A821R_07 Datasheet, PDF (1/39 Pages) Holtek Semiconductor Inc – USB Audio MCU

HT82A821R
USB Audio MCU
Features
· USB 2.0 full speed compatible
· USB spec v1.1 full speed operation and USB audio
device class spec v1.0
· Operating voltage: f_SYS= 6MHz/12MHz: 3.3V~5.5V
· Low voltage reset function (3.0V±0.3V)
· High-performance 48kHz sampling rate for audio
playback
· Embedded class AB power amplifier for speaker
driving
· Embedded High Performance 16 bit audio DAC
· Support digital volume control
· HID support which can remote control of playback
volume/mute
· 3 endpoints supported (endpoint 0 included)
· Support 1 Control , 1 Interrupt , 1 Isochronous
transfer
· Total FIFO size are 400 byte (8, 8, 384 for EP0~EP2)
· 2048´15 program memory ROM
· 192´8 MCU type data memory RAM (Bank0)
· HALT function and wake-up feature reduce power
consumption
· 8 bidirectional I/O lines (max.)
· Two 16-bit programmable timer/event counter and
overflow interrupts
· Watchdog Timer
· 16-level subroutine nesting
· Bit manipulation instruction
· 15-bit table read instruction
· 63 powerful instructions
· All instructions in one or two machine cycles
· 24-pin SSOP (150mil), 24-pin SOP (300mil) package
General Description
This HT82A821R is an 8-bit high performance
RISC-like microcontroller designed for USB Speaker
product applications. The HT82A821R combines a
16-bit DAC, USB transceiver, SIE (Serial Interface En-
gine), audio class processing unit, FIFO, 8-bit MCU into
a single chip. The DAC in the HT82A821R is operating
at the 48kHz sampling rate. The HT82A821R has a digi-
tal programmable gain amplifier. The gain range is from
-32dB to +6dB.
The HT82A821R has a Human Interface Device func-
tion that allows a user to control the playback volume at
the device side. The HT82A821R also can mute the an-
alog output signal by the operation of HID buttons.
Rev. 1.10
1
June 29, 2007