88W8000 datasheet, PDF - EEWORLD Datasheet

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88W8000: DescriptionWireless LAN 802.11b Access Point Chipset; File Size145KB，2 Pages; ManufacturerETC

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88W8000 Overview

Wireless LAN 802.11b Access Point Chipset

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Wireless

Solutions

Libertas

™

Wireless LAN 802.11b Access Point Chipset

88W8000 and 88W8500

802.11b Access Point solution. The 88W8000 product performs all of the functions of an RF transceiver by

integrating a 20 dBm power ampliÞer, low noise ampliÞer, voltage-controlled oscillator, frequency synthesizer, as

well as other necessary RF and analog functions onto one CMOS chip. The 88W8500 device is a single chip that

combines the functions of the Direct Sequence Spread Spectrum (DSSS) baseband processor, Medium Access

Control (MAC) processor, on-chip CPU, on-chip memory, advanced encryption, external SDRAM/FLASH memory

controller, and one Fast Ethernet port (MAC and PHY). The high level of integration reduces the overall Bill of

Materials (BOM) cost for an access point by eliminating the need for an external CPU and Fast Ethernet port for

wired infrastructure connectivity. Together, the Libertas 88W8000 and 88W8500 chipset supports IEEE 802.11b

data rates of 1, 2, 5.5 and 11 Mbps, as well as a proprietary data rate of 22 Mbps. The 88W8000 and 88W8500

chipset provides an optimal solution for access points as well as wireless home gateway applications.

88W8500

2.4 GHz

PRODUCT OVERVIEW

The Marvell

Libertas

88W8000 and 88W8500 Wireless LAN (WLAN) chipset comprises the worldÕs most integrated

88W8000

On-Chip

LNA

Filter

Switch

VCO

On-Chip

TR_SW

Serial I/F

Receiver

Frequency

Synthesizer

Transmitter

Power

Enable

Control

44 MHz

XOSC

Baseband Processor

Antenna

Diversity

ADC

DAC

Modulator

Demodulator

802.11

MAC

Protocol

Engine

Security

Engine

Internal Bus

SDRAM

Flash

Controller

802.3u MAC

802.3u PHY

ARM9

CPU

Memory

External

Flash or

SDRAM

MII, PCI, or

Twisted Pair

JTAG

UART

50 MHz

XOSC

GPIO/

LED

Power

Mgmt.

Serial

(EEPROM)

Controller

EEPROM

GPIO (15:0)

T/R Switch, Serial Interface, Power Enable Control

Fig 1. Libertas WLAN 802.11b Access Point Chipset (88W8000 and 88W8500) Block Diagram

88W8000 FEATURES

BENEFITS

2.4 GHz ISM Band Radio

Integration of all RF to analog baseband transmit and

receive functionalities

On-chip power ampliÞer with 20 dBm output power at the

antenna connector

On-chip power ampliÞer is programmable from 0 dBm to 20 dBm

Integrated power loop control

2x higher receiver sensitivity

Programmable frequency synthesizers with integrated

VCOs and I/Q generation

One single chip supports all RF to analog baseband functions of the

popular 802.11b standard

Reduces BOM cost, simpliÞes board layout and provides smaller

form factor

Reduces cost and increases range

Allows transmit power control to be implemented for power savings

and extended battery life for host system

Stabilizes power ampliÞer output at user designated values across

temperature, voltage supply and semiconductor variations

Improves detection of weak signals and increases range

Provide for longer range in terms of adaptive gain adjustments

for best signal reception

88W8000 Related Products

	88W8000	88W8500
Description	Wireless LAN 802.11b Access Point Chipset	Wireless LAN 802.11b Access Point Chipset

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