MX812 Datasheet, PDF (1/13 Pages) List of Unclassifed Manufacturers – VSR CODEC WITH DRAM CONTROL

DATA BULLETIN
M X 8 1 2 VSR CODEC WITH
DRAM CONTROL
PRELIMINARY INFORMATION
Features and Applications
• Half-Duplex Voice Storage and Retrieval
• Serial Bus µProcessor Control
• On-Chip DRAM Controller
• Up To 2 Minutes of High-Quality
Recorded Audio
• Answering Functions and Voice-
Notepad
• Low-Power 5-Volt CMOS
• Selectable Sample Rates and “Memory
Size”
MX812DW
28-pin SOIC
MX812J
28-pin CDIP
CLOCK
AUDIO OUT
VBIAS
AUDIO IN
EBIAS
VDD
VSS
CHIP SELECT
SERIAL CLOCK
COMMAND DATA
REPLY DATA
IRQ
CLOCK
GENERATOR
DEMOD
CV S D
CODEC
MOD
DRAM
CONTROL
POWER METER
STATUS REGISTER
SERIAL
C-BUS
INTERFACE
and
LOGIC
STORE/PLAY/WAIT COMMAND BUFFER
MODE REGISTER
Figure 1 - MX812 Voice Store and Retrieve Codec
WE
CAS
RAS1
A10/R2
A9
A8 EXTERNAL
A7
DRAM
A6
A5
1 or 2 x
A4
1Mbit
A3
DRAM
Chips
A2
A1
or
A0
1x
D
4Mbit
DRAM
Chip
DGND
© 1997 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 910 744-5050 Fax: [phone]
Doc. # 20480076.003
4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA All trademarks and service marks are held by their respective companies.