Critical Link, LLC
www.CriticalLink.com
FEATURES
Compatible with MitySOM-335x
based Development Kits from
Critical Link
WiFi Support
-
IEEE 802.11 b/g/n
Bluetooth Support
-
2.1+EDR
-
Power Class 1.5
Utilizing LSR’s TiWi-R2 Module
-
Based on TI WL1271
Transceiver
CL TiWi-R2 Expansion Kit
5 March 2014
(1.7” x 1.8” – actual size)
DESCRIPTION
The CL TiWi-R2 Expansion Kit is compatible with Critical Link’s line of MitySOM-
335x based development kits; one is required to interface with this expansion kit. All
MitySOM-335x based System on Modules support the CL TiWi-R2 expansion kit and
can be added to a development kit to add WiFi and Bluetooth functionality.
Each kit comes complete with a U.FL cable and a 2.4GHz 2dbi external antenna. It
seamlessly integrates into the Sitara
TM
application processor that is used in Critical Links
MitySOM-335x System on Modules. It is based upon the TiWi-R2 from LS Research
utilizing a Texas Instruments WL1271 Transceiver.
1
Copyright © 2007-2013, Critical Link LLC
Critical Link, LLC
www.CriticalLink.com
CL TiWi-R2 Expansion Kit
5 March 2014
CL TiWi-R2 Interface Description
The CL TiWi-R2 interfaces directly with a MitySOM-335x Development Kit through the
41-pin Hirose connector on the bottom of the Development Kit, J700. This interface
provides the necessary communications and voltage signals used by the CL TiWi-R2
Expansion Kit.
Linux Driver and API examples are available to support the WiFi functionality. The
802.11 b/g/n WiFi interface works directly with the Linux operating system and common
wireless LAN utilities such as WPA Supplicant and WPA_CLI are compatible.
For further information concerning the configuration and specifications of the TiWi-R2
module that the kit is based upon please visit LS Research: http://www.lsr.com/wireless-
products/tiwi-r2
CL TiWi-R2 Electrical Description
The CL TiWi-R2 Expansion Kit provides standard WiFi IEEE 802.11 data rates up to
65Mbps. The communications interface is routed to I2C0 on the MitySOM-335x module
that is installed in a MitySOM-335x Development Kit.
The electrical interface between the CL TiWi-R2 Expansion Kit and MitySOM-335x
based Development Kit is provided via the 41-pin Hirose header described in Table 1.
Please reference the MitySOM-335x Development Kit documentation for further details
on the pin-out of this connector.
2
Copyright © 2007-2013, Critical Link LLC
Critical Link, LLC
www.CriticalLink.com
CL TiWi-R2 Expansion Kit
5 March 2014
CL TiWi-R2 Expansion Kit Pinout
Table 2 shows the 41-pin Hirose header, J1, used to interface the CL TiWi-R2 Expansion
Kit to a MitySOM-335x based development kit.
Table 1: CL TiWi-R2 Expansion Kit 41-Pin Header
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Name
SPI_CSX/SDIO_D3_B
+3.3V
SDIO_D2_B
+3.3V
SDIO_D1_B
GND
SPI_DOUT/SDIO_D0_B
Reserved
RESETn
Reserved
CB_HOST_WL_IRQ_3V3
Reserved
UART_IRQ
Reserved
Reserved
Reserved
Reserved
GND
Reserved
Reserved
Reserved
SPI_DIN/SDIO_CMD_B
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
HOST_CB_SPI/SDIO_CLK_B
Reserved
GND
GND
VIO_1P8
Reserved
Reserved
HOST_CB_WL_EN_3V3
Reserved
I2C0_SDA
Reserved
I2C_SCL
Type
I/O
Power
I/O
Power
I/O
Power
I/O
-
I
-
I/O
-
O
-
-
-
-
Power
-
-
-
I/O
-
-
-
-
-
-
-
I/O
-
Power
Power
Power
-
-
I/O
-
I/O
-
I/O
Note
3
Copyright © 2007-2013, Critical Link LLC
Critical Link, LLC
www.CriticalLink.com
CL TiWi-R2 Expansion Kit
5 March 2014
ABSOLUTE MAXIMUM RATINGS
If Military/Aerospace specified cards are
required, please contact the Critical Link
Sales Office or unit Distributors for
availability and specifications.
Maximum Supply Voltage, Vcc
Storage Temperature Range
3.4 V
-65C to 85C
OPERATING CONDITIONS
Industrial Temperature
Range
Humidity
-40 to +85C
0 to 95%
Non-condensing
ELECTRICAL CHARACTERISTICS
Symbol
Vcc
Icc
Parameter
Voltage supply, 3.3 volt input.
Quiescent Current draw, 3.3 volt input
Conditions
Min
Typ
3.3
TBD
Max
3.4
TBD
Units
Volts
Milliamps
4
Copyright © 2007-2013, Critical Link LLC
Critical Link, LLC
www.CriticalLink.com
ORDERING INFORMATION
CL TiWi-R2 Expansion Kit
5 March 2014
The following table lists the orderable module configurations. For shipping status,
availability, and lead time of these or other configurations please contact your Critical
Link representative.
A compatible 802.11 antenna and cable (may vary) are provided with each CL TiWi-R2
Expansion Kit.
Table 2: Orderable Model Numbers
Part Number
Protocol(s) Supported
80-000535
802.11 b/g/n and Bluetooth 2.1
MECHANICAL INTERFACE
A mechanical outline of the CL TiWi-R2 Expansion Board is illustrated below.
Figure 1: Dimensions 1.73" x 1.79" – Top and Bottom Mechanicals
5
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