series
Marvell Avastar 88W8782U WLAN SoC
Supports a USB 2.0 Interface for Connecting WLAN Activity
to the Host Processor
PRODUCT OVERVIEW
The Marvell
®
Avastar™ 88W8782U is a highly integrated wireless local area network (WLAN) system-on-chip (SoC),
specifically designed to support high throughput data rates for next generation WLAN products and is part of the
Marvell Avastar family of wireless devices. The Avastar family includes single-function and multi-function radios that
establish new industry benchmarks for power consumption, wireless performance, solution footprint and
advanced features.
The Marvell Avastar 88W8782U is designed to support IEEE 802.11a/g/b and 802.11n payload data rates. The device
provides the combined functions of Direct Sequence Spread Spectrum (DSSS) and Orthogonal Frequency Division
Multiplexing (OFDM) baseband modulation, Medium Access Controller (MAC), CPU, memory, host interfaces, and
direct-conversion WLAN RF radio on a single integrated chip.
For security, the 88W8782U supports 802.11i security standards through implementation of the Advanced Encryp-
tion Standard (AES)/Counter Mode CBC-MAC Protocol (CCMP), Wired Equivalent Privacy (WEP) with Temporal Key
Integrity Protocol (TKIP), Advanced Encryption Standard (AES)/Cipher-Based Message Authentication Code (CMAC),
and WLAN Authentication and Privacy Infrastructure (WAPI) security mechanisms.
For video, voice, and multimedia applications, 802.11e Quality of Service (QoS) is supported. Also supported are
802.11h Dynamic Frequency Selection (DFS) for detecting radar pulses when operating in the 5 GHz range.
The device is also equipped with a coexistence interface for external, co-located 2.4 GHz radios.
The 88W8782U supports a USB 2.0 interface for connecting WLAN activity to the host processor. The device is avail-
able in a QFN package option.
BLOCK DIAGRAM
WLAN MAC / Baseband
Encryption
c
802.11
MAC
SRAM
Direct Conversion RF
PA
T/R
T/R
Switch
802.11
Baseband
(DSSS/OFDM)
LNA
WLAN RF
PA
T/R
Switch
LNA
2.4 GHz WLAN Tx/Rx
5 GHz WLAN Tx
5 GHz WLAN Rx
Processor
C
P
U
SRAM /
ROM
B
U
S
JTAG Interface
Feroceon
CPU
CPU
JTAG
Interface
Timers /
Interrupts
Power Management
Power Down
Sleep Clock
Power
Management
I
N
T
E
R
N
A
L
B
U
S
Coexistence
Arbiter
Coexistence Interface
Common Analog
DMA
XTAL_IN
XTAL_OUT
REF_CLK_OUT
Common Analog Unit
LDOs
LDO
Peripheral Bus
Host Interface
3-Wire, 4-Wire Interface
2-Wire Serial Interface
1-Wire Serial Interface
Serial EEPROM
UART
GPIO
Clocked
Serial Unit
B
U
S
USB
UART
GPIO/LED
OTP
Peripheral Bus Unit
USB 2.0
Fig 1. Avastar 88W8782U SoC Block Diagram
series
Marvell Avastar 88W8782U WLAN SoC
SPECIFICATIONS
WLAN MAC
•
Ad-Hoc and Infrastructure Modes
•
RTS/CTS for operation under DCF
•
Hardware filtering of 32 multicast addresses and duplicate frame
detection for up to 32 unicast addresses
•
On-chip Tx and Rx FIFO for maximum throughput
•
Open System and Shared Key Authentication services
•
A-MPDU Rx (de-aggregation) and Tx (aggregation)
•
20/40 MHz coexistence
GENERAL FEATURES
•
Single-chip integration of 802.11 wireless radio, baseband, MAC, CPU,
memory, host interface
•
CMOS and low-swing sinewave input clock
•
12, 13, 19.2, 20, 24, 26, 38.4, 40, 44, and 52 MHz crystal clock
support with auto-frequency detection if external sleep clock is
available
•
Low power operation supporting deep sleep and standby modes
•
Power management with external sleep clock support for near zero
deep sleep power
•
Option to power directly from battery or to use 3.3V/1.8V/1.2V pre-
regulated supplies
•
One time programmable (OTP) memory to eliminate need for external
EEPROM
•
Fully compatible with Marvell Power Management device(s)
•
Reduced Inter-Frame Spacing (RIFS) bursting
•
Management information base counters
•
Radio resource measurement counters
•
Block acknowledgement with 802.11n extension
•
Dynamic frequency selection (DFS)
•
Transmit beamformee support
•
Transmit rate adaptation
•
Transmit power control
•
Long and short preamble generation on a frame-by-frame basis for
802.11b frames
•
Marvell Mobile Hotspot
APPLICATIONS
•
Imaging platforms (printers, digital still cameras (DSC), digital picture
frames)
•
Gaming platforms
•
Consumer electronic devices (TV, DVD players, Blu-ray players, etc.)
•
Cell phones and other mobile applications
•
eBooks
WLAN BASEBAND
•
802.11n 1x1 SISO (on-chip Marvell SISO RF radio)
•
Backward compatibility with legacy 802.11a/g/b technology
•
PHY data rates up to 150 Mbps
•
20 MHz bandwidth/channel, 40 MHz bandwidth/channel, upper/lower
20 MHz bandwidth in 40 MHz channel, and 20 MHz duplicate legacy
bandwidth in 40 MHz channel mode operation
•
Modulation and Coding Scheme (MCS)—0~7 and 32 (duplicate 6 Mbps)
•
Enhanced radar detection for long and short pulse radar
•
Enhanced AGC scheme for DFS channel
•
Japan DFS requirements for W53 and W56
•
Radio resource measurement
•
Optional 802.11n SISO features:
- 20/40 MHz coexistence
- 1-stream STBC reception
- Short guard interval
- RIFS on receive path
- Beamformee function and hardware acceleration
- Greenfield Tx/Rx
•
Power save features
IEEE 802.11/STANDARDS
•
802.11 data rates of 1 and 2 Mbps
•
802.11b data rates of 5.5 and 11 Mbps
•
802.11a/g data rates 6, 9, 12, 18, 24, 36, 48, and 54 Mbps for
multimedia content transmission
•
802.11g/b performance enhancements
•
802.11n compliant, with maximum data rates up to 72 Mbps (20 MHz
channel) and 150 Mbps (40 MHz channel)
•
802.11d international roaming
•
802.11e QoS block acknowledgement (with support for 802.11n
extension)
•
802.11h transmit power control
•
802.11h DFS radar pulse detection
•
802.11i enhanced security
•
802.11k radio resource measurement
•
802.11r fast hand-off for AP roaming
•
802.11w protected management frames
•
Fully supports clients (stations) implementing IEEE Power Save mode
•
Wi-Fi Direct connectivity
WLAN RADIO
•
Integrated direct-conversion radio
•
20 and 40 MHz channel bandwidths
•
Integrated T/R switch, PA, and LNA for 2.4 GHz path
•
Integrated PA and LNA for 5 GHz path
•
WLAN Rx Path
- Direct conversion architecture eliminates need for external SAW filter
- On-chip gain selectable LNAs with optimized noise figure and power
consumption
- High dynamic range AGC function in receive mode
•
WLAN Tx Path
- Integrated power amplifiers with power control
- Closed/open loop power control (0.5 dB increments)
PACKAGING
•
QFN
PROCESSOR
•
CPU
- Integrated Marvell Feroceon® CPU (ARMv5TE-compliant)
- 128 MHz maximum CPU clock speed
•
DMA
- Independent 2-Channel Direct Memory Access (DMA)
MEMORY
•
Internal SRAM for Tx frame queues/Rx data buffers
•
Boot ROM
•
ROM patching capability
- Optimized Tx gain distribution for linearity and noise performance
•
WLAN Local Oscillator
- Fractional-N for multiple reference clock support
- Fine channel step, AFC (adaptive frequency control)
series
Marvell Avastar 88W8782U WLAN SoC
SPECIFICATIONS
WLAN ENCRYPTION
•
WEP 64- and 128-bit encryption with hardware TKIP processing (WPA)
•
AES-CCMP hardware implementation as part of 802.11i security
standard (WPA2)
•
Enhanced AES engine performance
•
AES-Cipher-Based Message Authentication Code (CMAC) as part of the
802.11w security standard
•
WLAN Authentication and Privacy Infrastructure (WAPI)
COEXISTENCE
•
Coexistence interface for external, co-located 2.4 GHz radio
- Marvell 3/4-wire interface
- WL_ACTIVE 3/4-wire interface
- WL_ACTIVE 2-wire interface
HOST INTERFACES
•
USB 2.0 interface
PERIPHERAL BUS INTERFACES
•
Clocked Serial Unit (CSU)
- 3-Wire, 4-Wire Serial Interface
- 2-Wire Serial Interface
- 1-Wire Serial Interface
- SPI EEPROM Interface
•
16550 UART
•
General Purpose Input Output (GPIO)
•
OTP memory to eliminate need for external EEPROM
TEST
•
On-chip diagnostic information
series
Marvell Avastar 88W8782U WLAN SoC
THE MARVELL ADVANTAGE:
Marvell chipsets come with complete reference designs which include board layout
designs, software, manufacturing diagnostic tools, documentation, and other items to assist customers with
product evaluation and production. Marvell’s worldwide field application engineers collaborate closely with end
customers to develop and deliver new leading-edge products for quick time-to-market. Marvell utilizes world-
leading semiconductor foundry and packaging services to reliably deliver high-volume and low-cost total solutions.
ABOUT MARVELL:
Marvell is a leader in storage, communications, and consumer silicon solutions. Marvell’s diverse
product portfolio includes switching, transceiver, communications controller, processor, wireless, power management,
and storage solutions that power the entire communications infrastructure, including enterprise, metro, home, storage,
and digital entertainment solutions. For more information, visit our Web site at
www.marvell.com.
Marvell Semiconductor, Inc.
5488 Marvell Lane
Santa Clara, CA 95054
Phone 408.222.2500
www.marvell.com
Copyright © 2010. Marvell International Ltd. All rights reserved. Marvell, Moving Forward
Faster, the Marvell logo, Alaska, AnyVoltage, DSP Switcher, Fastwriter, Feroceon, Libertas,
Link Street, PHYAdvantage, Prestera, TopDog, Virtual Cable Tester, Yukon, and ZJ are
registered trademarks of Marvell or its affiliates. Armada, Avastar, CarrierSpan, LinkCrypt,
Marvell Smart, PowerSmart PFC, Powered by Marvell Green PFC, Qdeo, QuietVideo,
Sheeva, TwinD, and VCT are trademarks of Marvell or its affiliate. All other trademarks are
the property of their respective owners.
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