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HT82A851R -- USB Audio MCU
General Description
The HT82A851R is an 8-bit high performance
RISC-like microcontroller designed for wireless USB Phone product
applications. The HT82A851R combines a SPI, USB transceiver, SIE
(Serial Interface Engine), audio class processing unit, FIFO and an
8-bit MCU into a single chip. The play frequency in the HT82A851R
operates at a sampling rate of 48/8kHz. HT82A851R has a digital
programmable gain amplifier. The gain range is from -32dB to +6dB.
For the Isochronous input, the digital gain range is from 0dB to
19.5dB.
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Features
- Operating voltage: fSYS= 6MHz/12MHz:
3.3V~5.5V
- 16 bidirectional I/O lines (max.)
- Two 16-bit programmable timer/event counters and
overflow interrupts
- 4096x15 program memory ROM
- 384x8 data memory RAM (Bank0,1)
- USB 2.0 full speed compatible
- USB spec V1.1 full speed operation and USB audio
device class spec V1.0
- Built-in digital PGA (Programmable Gain Amplifier)
- 48kHz/8kHz sampling rate for audio playback
controlled by software option
- 8kHz audio recording sampling rate
- 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: 464 bytes
(8, 8, 384, 32, 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)
- 24-pin SSOP package
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