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HT82A821R -- USB Audio MCU
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 Engine), 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 digital programmable gain amplifier. The gain range is from
-32dB to +6dB.
The HT82A821R has a Human Interface Device function that allows a user to control the playback volume at the device side. The HT82A821R also can mute the analog output signal by the operation of HID buttons.
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Features
- USB 2.0 full speed compatible
- USB spec v1.1 full speed operation and USB audio device class spec v1.0
- Operating voltage: fSYS= 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)
- 2048x15 program memory ROM
- 192x8 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
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