LSDEV-WI01-A20 LS Research, LSDEV-WI01-A20 Datasheet - Page 15

• Manufacturer Part Number: LSDEV-WI01-A20
• Description: WiFi / 802.11 Modules & Development Tools TiWi RF Dev Kit
• Manufacturer: LS Research

Specifications of LSDEV-WI01-A20

• Wireless Frequency: 2412 MHz to 2472 MHz
• Interface Type: SDIO
• Modulation: GFSK, CCK, OFDM
• Operating Voltage: 3 V to 4.8 V
• Output Power: 12.5 dBm to 20 dBm
• Antenna: U.FL Connector for External Antenna (Not Included)
• Operating Temperature Range: - 40 C to + 85 C
• 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
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