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HT82A824R -- USB Audio MCU
General Description
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.
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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 at fSYS = 6M/12MHz: 4.0V~5.5V
- 48KHz/44.1KHz sampling rate for audio playback selected by
software
- Embedded class AB power amplifier for ear phone speaker driving
(32Ω)×2
- Embedded High Performance 16-bit stereo audio Sigma-Delta DAC
- Pass Microsoft® DTM (WHQL) USB audio device
- Audio playback digital volume control
- 6 endpoints supported including endpoint 0
- Support 1 Control, 2 Interrupts, 1 Isochronous and 2 Bulk
transfers
- One hardware implemented Isochronous transfer
- Total FIFO size are 528 bytes (8, 8, 384, 32, 32, 64 for
EP0~EP2,EP4~EP6)
- 8192×16 Program Memory
- 352×8 MCU type data memory RAM (Bank 0, Bank 9)
- 128×8×4 Speaker Output Data or 12-bit ADC Converted Data RAM
(Bank1, Bank2, Bank3, Bank4)
- USB Audio and 12-bit ADC Stereo Data Capture DMA
- 128×8×4 MCU Type General Purpose Data RAM (Bank5, Bank6, Bank7,
Bank8)
- 6-channel 12-bit A/D converter
- 2-channel PWM function shared with PB2~PB3
- Dual Programmable Attenuator for 2-channel external stereo audio
input
- Universal Asynchronous Receiver Transmitter (UART) shared with
PB0~PB1
- SPI interface (master and slave mode) shared with PC4~PC7
- Programmable frequency divider (PFD) function shared with PC0
- Power-down function and wake-up reduce power consumption
- Up to 21 bidirectional I/O lines
- Dual 16-bit programmable Timer/Event Counters with overflow
interrupts
- Watchdog Timer
- 16-level subroutine nesting
- Bit manipulation instruction
- 16-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 LQFP package
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