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
·
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
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
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
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
cycles
·
Low voltage reset function (3.0V±0.3V)
·
24-pin SSOP package
transfer
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
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
