User Manual

MPA Project Document DOC #
XWING1 Users Guide
Copyright 2011 Motorola Solutions, Inc.
20110307-A 16 of 20
Confidential Material – Disclosure Strictly Prohibited.
2.3. WLAN
2.3.1. Host Communications
The WLAN core requires a total of eight (8) dedicated signals in order to communicate
to the host processor. The WLAN core is enabled via the WL_EN signal (1) and
communicates to the host processor via SDIO (6) with an additional interrupt signal
WL_IRQ(1).
2.3.1.1. Hardware Interface
The interface between the host and the XW1 Module is a standard SDIO interface (see
SDIO spec version 2.0), supporting maximum clock rate of 25MHz.
2.3.2. WLAN MAC
The TI1273 MAC implements the IEEE standard 802.11 MAC via an Embedded ARM™
Central Processing Unit (CPU)
– Hardware-Based Encryption/Decryption Using 64-, 128-, and 256-Bit WEP, TKIP or AES Keys,
– Supports requirements for Wireless Fidelity (Wi-Fi) Protected Access (WPA and WPA2.0) and IEEE
Std 802.11i [Includes Hardware-Accelerated Advanced-Encryption Standard (AES)]
– Designed to Work With IEEE Std 802.1x for Virtual Private Network (VPN) Solutions
2.3.3. WLAN Baseband Processor
The TI1273 baseband processor is situated between the on-chip MAC and radio. IEEE
Std 802.11n single-stream data rates (MCS0-7) and SGI support
2.3.4. RF Architecture
2.3.4.1. XW1 WLAN RF Paths
The XWING1 expands upon the Texas Instrument WiLink 6.0 (WL1273) reference
design to accommodate the MPA2’s WLAN diversity requirements. The XW1 module
has tightly integrated some additions / deviations to this reference design. The 5GHz
BPF has been replaced by a diplexer and the combined 2.4/5GHz RF path is switched
between two RF ports. This solution provides transmit and receive antenna-selection-
diversity between two dual-band RF ports.
2.4. Bluetooth
2.4.1. Host Communications