450-0009 LS Research, 450-0009 Datasheet - Page 19

• Manufacturer Part Number: 450-0009
• Description: WiFi / 802.11 Modules & Development Tools TiWi-R1 Module with U.FL Connector
• Manufacturer: LS Research

Specifications of 450-0009

• Wireless Frequency: 2.4 GHz
• Modulation: GFSK
• Security: 62 bit, 128 bit, 256 bit WEP
• Operating Voltage: 3.3 V
• Antenna: External (Not Included)
• For Use With/related Products: LM3S1918
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ENABLE SCHEME
The module has 3 enable pins, one for each core: WL_EN, and BT_EN and FM_EN. Presently, there are 2
modes of active operation now supported: WLAN and BT. It is recommended that the FM_EN pin be grounded to
disable the FM section. It is also recommended that the FM section be disabled by Bluetooth HCI commands.
1. Each core is operated independently by asserting each EN to Logic '1'. in this mode it is possible to
control each core asynchronously and independently.
2. BT mode operation. WLAN will be operated through WL_EN asynchronously independently
of BT
IRQ OPERATION
The information in this document is subject to change without notice.
Confirm the data is current by downloading the latest revision from www.lsr.com.
330-0041-Rev2.4
1. The default state of the WLAN_IRQ prior to firmware initialization is 0.
2. During firmware initialization, the WLAN_IRQ is configured by the SDIO module; a WLAN_IRQ
3. A WLAN firmware interrupt is handled as follows:
4.
changes its state to 1.
The host is ready to receive another interrupt from the WLAN device.
a. The WLAN firmware creates an Interrupt-to-Host, indicated by a 1-to-0 transition on the
b.
c. The host reads the internal register status to determine the interrupt sources - the register is
d. The host processes in sequence all the interrupts read from this register
e. The host unmasks the firmware interrupts.
WLAN_IRQ line (host must be configured as active-low or falling-edge detect).
firmware interrupt. The WLAN_IRQ line returns to 1 (0-to-1 transition on the WLAN_IRQ line).
cleared after the read.
After the host is available, depending on the interrupt priority and other host tasks, it masks the
Copyright © 2010 LS Research, LLC
TiWi-R1 TRANSCEIVER MODULE
DATASHEET
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