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AT73C246
Power Management Unit and Stereo Audio Codec
DDR2
MCU Core
MCU I/O & RF IC
Backup
Headquarters
Memory
VDD0
VDD1
VDD2
VDD3
VDD4
Battery
VBACKUP
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131, USA
DCDC0
0.8V-3.6V
600mA
DCDC1
0.8V-3.6V
600mA
LDO2
0.8V-1.9V
300mA
LDO3
2.7V-3.6V
200mA
LDO4
2.7V-3.6V
200mA
LDO5
BACKUP
2.5V
Tel.: (+1) (408) 441 0311
Fax: (+1) (408) 487 2600
Power
Wakeup
Reset
Interrupt
References
Supply
Monitor
Power Fail
Detector
Auxiliary
ADC
Auxiliary
Analog
Input
International
Atmel Asia
Unit 1-5 & 16,
State
Reset
Detector
Clock
Crystal
Real Time
Clock
Crystal OSC
32kHz
Power Management Unit
Over
Temperature
Machine Generator
Two
Wire
Interface
Control
19/F BEA Tower
Millennium City 5
418 Kwun Tong Road
Kwun Tong, Kowloon
Hong Kong
Mux
Bypass
Tel.: (852) 2245 6100
Fax: (852) 2722 1369
Line
L
R
Sidetone
Atmel Europe
Mic1
L
R
ADC
DAC
Speaker/
Headset L
Le Krebs
8, rue Jean-Pierre Timbaud
B.P. 309
Mic2
Aux
L
R
L
R
Mux
ADC
DAC
Sidetone
Speaker/
Headset R
78054 Saint-Quentin-en-Yvelines
Cedex, France
Tel.: (33) 1 30 60 70 00
Fax: (33) 1 30 60 71 11
Bypass
Atmel Japan
9F, Tonetsu Shinkawa Bldg.
Stereo Audio Codec
I 2 S
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
Tel.: (81) 3 3523 3551
Digital Audio
In/Out
The audio input of the AT73C246 is built around a stereo ADC with a 96dB dynamic range. It multiplexes/mixes
the inputs required by the majority of multimedia systems: two stereo microphones, an auxiliary input from, for
example, a FM receiver, and a line in from, for example, a digital media player. The audio input can be passed
directly to the stereo output if required, in bypass or sidetone mode that significantly reduces power consumption.
Otherwise the audio stream is digitized and transferred to the MCU via the industry-standard I 2 S bus.
Digital sound output is transferred from the MCU via the I 2 S bus before passing through a 100dB dynamic
range stereo DAC and output amplifiers that can directly drive a 60mW 16/32Ohm headset, or feed the input
of a stereo speaker amplifier. These highly integrated audio features offer unsurpassed sound quality.
The PMU of the AT73C246 is built around a dedicated set of voltage regulators, each configurable in 50mV
steps to provide precisely the voltage, current and noise immunity required by the MCU core and its I/Os, and
also the memory and RF/analog sections in the multimedia system. Each supply channel features fast and
accurate transient load responses, automatic ramping (digital voltage scaling), output voltage monitoring, and
over-current protection. Through its TWI bus control, the AT73C246 offers
numerous possibilities for power optimization. In addition to individual
function shutdown, it saves power with a fully programmable
standby and wake-up scenario where the application
can be partially or fully powered down.
To further reduce the bill-of-materials and space
requirements of the multimedia system, the AT73C246
also integrates a real-time-clock generator and a set of
auxiliary analog inputs that drive a 10-bit ADC for sensing and
measurement functions. Finally, the AT73C246 is delivered
in a compact 7.5x7.5mm QFN package that saves more than
Fax: (81) 3 3523 7581
Product Contacts
Technical Support
www.atmel.com/products/
powermanage
Sales Contacts
www.atmel.com/contacts
Web Site
www.atmel.com
? 2010 Atmel Corporation.
All rights reserved. Atmel ? , Atmel logo
and combinations thereof, and others
are registered trademarks or trademarks
of Atmel Corporation or its subsidiaries.
ARM ? and others are registered
trademarks or trademarks of ARM Ltd.
Other terms and product names may
be trademarks of others.
Rev.: 11058A-PMAAC-04/10/2M
30% of board space over alternative solutions.
AT73C246 Board
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel
products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDITIONS OF SALES LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY
RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY
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