TWR‐WIFI‐RS2101
User’s Manual
Rev. 1.0
Freescale Semiconductor Inc.
Contents
1 Overview ......................................................................................................................................................
3
2 Reference Documents ..............................................................................................................................
4
3 Hardware Features ................................................................................................................................... 4
3.1 RS9110‐N‐11‐21 Module ................................................................................................................................................. 4
3.2 System Power ....................................................................................................................................................................... 5
3.3 Access Header ...................................................................................................................................................................... 5
3.4 Elevator Connections ........................................................................................................................................................ 5
3.5 Mechanical Form Factor ...................................................................................
Error! Bookmark not defined.
4 Jumper Table ..............................................................................................................................................
8
Revision History
Revision
1.0
Date
July 2010
Changes
Initial Release
TWR‐WIFI‐RS2101 User’s Manual
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1 Overview
The Redpine Wi‐Fi Tower Module (TWR‐WIFI‐RS2101) is a low‐cost evaluation, demonstration and
development board that features an 802.11n solution from Redpine Signals. The following list
summarizes the features of the TWR‐WIFI‐RS2101:
RS9110‐N‐11‐21 Wi‐Fi module
o
Compliant to 802.11b/g and single stream 802.11n
o
Supports all Wi‐Fi client security protocols (WEP, WPA, and WPA2)
o
Reference Design certified for FCC/IC/CE
o
RoHS compliant
o
Does not require any WLAN driver on the host processor
o
Host interface through SPI
o
Terminates SLIP connections and offers transparent serial modem functionality
o
Integrated antenna, frequency reference, and low‐frequency clock
o
Ultra low power operation with power save modes
o
Single supply 3.1 to 3.6V operation
A block diagram for the TWR‐WIFI‐RS2101 is shown in the figure below.
Primary Elevator Connector
RSTOUT_B
POWER_EN
3.3V
•
SPI0
IRQ
GPIO1
Jumper
Power
Gate
Redpine Signals
RS9110-N-11-21-01 Module
(with on-board Antenna)
RESET
SPI, IRQ
10-pin Header
Figure 1. TWR‐WIFI‐RS2101 Block Diagram
TWR‐WIFI‐RS2101 User’s Manual
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2 Reference Documents
The documents listed below should be referenced for more information on the Freescale Tower
system and the TWR‐WIFI‐RS2101. Refer to http://www.freesale.com/tower for the latest revision of
all Tower documentation.
•
TWR‐WIFI‐RS2101 User Manual
•
TWR‐WIFI‐RS2101 Quick Start Guide
•
TWR‐WIFI‐RS2101 Lab Tutorial
•
RS9110‐N‐11‐21 Product Brief
•
RS9110‐N‐11‐21 Wi‐Fi Module Abridged Datasheet
3 Hardware Features
This section provides more details about the features and functionality of the TWR‐WIFI‐RS2101.
3.1 RS9110N1121 Module
The RS9110‐N‐11‐21 module from Redpine's Connect‐io‐n™ family of products is a complete IEEE
802.11bgn Wi‐Fi client device with a standard serial or SPI interface to a host processor or data source.
It integrates a MAC, Baseband processor, RF transceiver with power amplifier, a frequency reference,
an antenna, and all WLAN protocol and configuration functionality in embedded firmware to provide a
self‐contained 802.11n WLAN solution for a variety of applications. No WLAN driver functionality is
required on the host processor. Based on the Redpine Signals RS9110 SoC which includes an embedded
processor, it is designed to provide standards compliant wireless connectivity to devices and systems
that have a serial port and implement a TCP/IP stack. As a wireless serial modem, the RS9110‐N‐11‐21
handles SLIP packets and accepts AT commands for configuration, enabling a variety of M2M
applications at low cost and small footprint. It uniquely provides connectivity in the single stream
802.11n mode, preserving overall network throughput in the emerging enterprise environments.
For the TWR‐WIFI‐RS2101 Tower Peripheral Module, the RS9110‐N‐11‐21 module communicates with
the MCU through an SPI.
Figure 2 shows a functional block diagram of the RS9110‐N‐11‐21module. Refer to the RS9110‐N‐11‐
21Wi‐Fi Module Abridged Datasheet for more information.
TWR‐WIFI‐RS2101 User’s Manual
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GPIO
Freescale MCU
SPI
SPI/UART
Selection
Applications
MQX OS/TCP IP
SLIP
BT Coexistence I/f
RS9110
RF
Transceiver
RF
FE
SLIP
WLAN St ack
Flash
RS9110 WLAN Subsystem
3.3V
Supply
Reset
Reset
XO
LED
RS9110-N-11-21-01
Test Port
Figure 2. RS9110‐N‐11‐21 Module: Functional Block Diagram
3.2 System Power
The RS9110‐N‐11‐21 is powered from a source in an assembled Tower System via the 3.3V supply on
the Primary Elevator Connector.
3.3 Access Header
The SPI and interrupt signals are routed to both the Primary Elevator connector and a 2x5 pin header.
This Access Header can be used to access the RS9110‐N‐11‐21 module signals for probing or for use
outside of the Tower System. The pinout is shown in Table 1.
Table 1. Access Header Connections
RS9110‐N‐11‐21
Signal
3.3V
SPI_CLK
No Connect
SPI_DATAOUT
SPI_DATAIN
Pin
1
3
5
7
9
2
4
6
8
10
RS9110‐N‐11‐21
Signal
GND
SPI_INTR
No Connect
SPI_CS
GND
3.4 Elevator Connections
The TWR‐WIFI‐RS2101 features two expansion card‐edge connectors that interface to Elevator boards
in a Tower system: the Primary and Secondary Elevator connectors. The Primary Elevator connector,
comprised of sides A and B, is utilized by the TWR‐WIFI‐RS2101, while the Secondary Elevator
connector only makes connections to ground (GND). Table 2 provides the pinout for the Primary
TWR‐WIFI‐RS2101 User’s Manual
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