HT82A851R Datasheet, PDF (1/43 Pages) Holtek Semiconductor Inc – USB Audio MCU

HT82A851R
USB Audio MCU
Features
· Operating voltage: f_SYS = 6M/12MHz: 3.3V~5.5V
· 16 bidirectional I/O lines (max.)
· Two 16-bit programmable timer/event counters and
overflow interrupts
· 4096´15 program memory ROM
· 384´8 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
General Description
The HT82A851R is an 8-bit high performance RISC-like
microcontroller designed for wireless USB Phone prod-
uct applications. The HT82A851R combines a SPI,
USB transceiver, SIE (Serial Interface Engine), audio
class processing unit, FIFO and an 8-bit MCU into a sin-
gle chip. The play frequency in the HT82A851R oper-
ates 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 digi-
tal gain range is from 0dB to 19.5dB.
Rev. 1.20
1
June 15, 2007