User's Manual

M2US50NBT/M2SD50NBT
Hardware Integration Guide
Embedded Wireless Solutions Support Center:
http://ews-support.lairdtech.com
www.lairdtech.com/wireless
4
Laird
Americas: [phone]
Europe: [phone]
Hong Kong: [phone] x026
Scope
This document describes key hardware aspects of the Laird
M2US50NBT/M2SD50NBT modules. This document is intended to assist device
manufacturers and related parties with the integration of this radio into their host
devices. Data in this document is drawn from a number of sources and includes
information found in the Laird SSD50NBT which including Qualcomm Atheros
(QCA) QCA6004 and Cambridge Silicon Radio Ltd. (CSR) CSR8811 A08 data sheet
issued in July 2011, along with other documents provided from QCA and CSR.
This Laird 50-series module is currently in development stage and this document
is preliminary. The information in this document is subject to change. Please
contact Laird to obtain the most recent version of this document.
M2US50NBT/M2SD50NBT FEATURES SUMMARY
The Laird M2US50NBT/M2SD50NBT device features are described in Table 1.
Table 1: M2US50NBT/M2SD50NBT features
Feature
Description
Radio Front End
Integrates the complete transmit/receive RF paths including baluns, coexistence band
pass filter, diplexer, switches, power amplifier, low noise amplifier, and reference
crystal oscillator.
Enhanced WLAN/BT
Coexistence
Algorithms
Enhanced important use cases including:
 PCM/I2S digital audio interface
 BT stereo audio (A2DP)
 BT data transfer profiles (such as OPP and FTP)
 BT2.1+EDR
 BT-LE
Flexible radio architecture ensures simple customization for future use cases.
Power Management
Uses power-saving techniques including:
 Gating clocks to idle or inactive blocks
 Fast start and settling circuits to reduce Tx power
 Active duty cycles
 CPU frequency scaling
Pre-Calibration
RF system tested and calibrated in production.
Internal Sleep Clock
Integrated on-chip low power sleep clock to regulate internal timing.
Multiple Interface
Support
 M2SD50NBT – SDIO 2.0 (50 MHz, 4-bit and 1-bit) for WLAN
 M2US50NBT – USB for WLAN
 HS-UART and PCM for Bluetooth HCI (compatible with any upper layer Bluetooth
stack)
Advanced 802.11n
 Half Guard Interval and Frame Aggregation for high throughput
 Space Time Block Coding (STBC) Rx for improved downlink robustness over range
 Low Density Parity Check (LDPC) for improved uplink and downlink robustness over
range
Reference Frequency
 Incorporates a 26 MHz reference frequency source in package