450-0009 LS Research, 450-0009 Datasheet - Page 15

• 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

WLAN POWER-UP SEQUENCE
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
The following sequence describes device power-up from shutdown. Only the WLAN Core is enabled; the
BT and FM cores are disabled.
The duration of T1 is defined as the time from WL_EN=high until Fref is valid for the SoC, T1 ~55ms
The duration of T2 depends on:
– Operating system
– Host enumeration for the SDIO/WSPI
– PLL configuration
– Firmware download
– Releasing the core from reset
– Firmware initialization
1. No signals are allowed on the IO pins if no IO power supplied, because the IOs are not 'fail
safe’. Exceptions are CLK_REQ_OUT, SLOWCLK, XTALP and AUD_xxx, which are failsafe and
can tolerate external voltages with no VDDS and DC2DC".
2. VBAT,VIO and SLOWCLK must be available before WL_EN.
3. T
A.
wakeup
After this sequence is completed, the device is in the low VIO-leakage state while in shutdown.
= T1 + T2
Figure 4-1: TiWi Power-up Sequence Requirements
Copyright © 2010 LS Research, LLC
TiWi-R1 TRANSCEIVER MODULE
DATASHEET
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