88W8688 Datasheet, PDF (1/6 Pages) –

88W8688
Integrated MAC/Baseband/RF WLAN and Bluetooth SoC
Product Brief
PRODUCT OVERVIEW
The Marvell^® 88W8688 is a low-cost, low-power
highly-integrated IEEE 802.11a/g/b MAC/Baseband/RF
WLAN and Bluetooth Baseband/RF system-on-chip
(SoC). The device is designed to support IEEE 802.11a
or 802.11g payload data rates of 6, 9, 12, 18, 24, 36, 48,
and 54 Mbps, as well as 802.11b data rates of 1, 2, 5.5,
and 11 Mbps for WLAN operation. For Bluetooth
operation, the device supports Bluetooth 3.0 + High
Speed (HS) (also compliant with Bluetooth 2.1 + EDR).
The 88W8688 provides the combined functions of the
IEEE Standard 802.11/802.11b Direct Sequence Spread
Spectrum (DSSS), 802.11a/g Orthogonal Frequency
Division Multiplexing (OFDM) baseband modulation,
Medium Access Controller (MAC), CPU, memory, host
interfaces, direct-conversion WLAN RF radio, and
Bluetooth on a single integrated chip.
The core functional units of the 88W8688 are connected
with a high throughput interconnect system, as shown in
Figure 1.
The 88W8688 is equipped with a fully integrated RF to
baseband radio that operates in both the 2.4 GHz ISM
radio band for 802.11g/b WLAN applications and 5 GHz
UNII radio band for 802.11a WLAN applications. It also
contains all the circuitry to support both transmit and
receive for Bluetooth operation.
For optimum performance, the gain adjustment of the
integrated LNA and AGC on the receive path is
seamlessly controlled by baseband functions.
Integrated transmitters up-convert the quadrature
baseband signal, and then deliver the RF signals to
external power amplifiers for 2.4 GHz and 5 GHz radio
band transmission.
Local oscillator frequencies are generated by a fully
integrated programmable frequency synthesizer with no
external components. The loop bandwidth is optimized
for phase noise and dynamic performance and
quadrature signals are generated on-chip.
For security, the 88W8688 supports the IEEE 802.11i
security standard through implementation of the
Advanced Encryption Standard (AES)/Counter Mode
CBC-MAC Protocol (CCMP), and Wired Equivalent
Privacy (WEP) with Temporal Key Integrity Protocol
(TKIP) security mechanisms. The device also supports
Internet Protocol Security (IPsec) with DES/3DES/AES
encryption and MD5/SHA-1 authentication.
For video, voice, and multimedia applications, the
88W8688 supports 802.11e Quality of Service (QoS).
The device also supports 802.11h Dynamic Frequency
Selection (DFS) for detecting radar pulses when
operating in the 5 GHz range.
The 88W8688 supports a generic SPI (G-SPI) and SDIO
host interface for connecting the WLAN to the host
processor. High-speed UART, PCM/Inter-IC Sound (I²S),
and SDIO interfaces are available to connect the
Bluetooth core to the host processor. A Bluetooth
coexistence interface is also supported for external,
co-located Bluetooth devices.
Copyright © 2009 Marvell
November 30, 2009, 2.00
Doc. No. MV-S106650-00 Rev. F
Page 1