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HT82A834R -- USB Audio MCU
General Description
The HT82A834R is an 8-bit high performance RISC-like
microcontroller designed for USB Phone product applications. The HT82A834R combines a 16-bit PCM
ADC, USB transceiver, SIE (Serial Interface Engine), audio class processing unit, FIFO and an 8-bit MCU into
a single chip. The DAC in the HT82A834R operates at a sampling rate of 48kHz/8kHz and the 16-bit PCM ADC
operates at 8/16kHz for the Microphone input. For the DAC, the HT82A834R has a digital programmable gain
amplifier. The gain range is from -32dB to +6dB. For the ADC input, the digital gain range is from 0dB to 19.5dB.
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Features
- Operating voltage: fSYS= 6M/12MHz: 3.3V~5.5V
- 24 bidirectional I/O lines (max.)
- Two 16-bit programmable timer/event counters and
overflow interrupts
- 4096x15 program memory ROM
- 192x8 data memory RAM (Bank 0)
- USB 2.0 full speed compatible
- USB spec V1.1 full speed operation and USB audio
device class spec V1.0
- Embedded high-performance 16 bit PCM ADC
- Built-in Digital PGA (Programmable Gain Amplifier)
- 48kHz/8kHz sampling rate for audio playback
controlled by software option
- 8kHz/16kHz audio recording sampling rate
- Embedded class AB speaker driver power amplifier
- Embedded High Performance 16 bit audio DAC
- Supports audio playback digital volume control
- 5 endpoints supported (endpoint 0 included)
- Supports 1 Control, 2 Interrupt, 2 Isochronous
transfer
- Two hardware implemented Isochronous transfers
- Total FIFO size: 496 bytes
(8, 8, 384, 64, 32 for EP0~EP4)
- Programmable frequency divider (PFD)
- Integrated SPI hardware circuit
- Play/Record Interrupt
- HALT and wake-up features reduce power
consumption
- Watchdog Timer
- 16-level subroutine nesting
- Bit manipulation instruction
- 15-bit table read instruction
- 63 powerful instructions
- All instructions executed within one or two machine
cycles
- Low voltage reset function (3.0V±0.3V)
- 48-pin SSOP/LQFP package
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