450-0053 Datasheet, PDF (18/42 Pages) List of Unclassifed Manufacturers – Integrated Transceiver Modules for WLAN 802.11 a/b/g/n, Bluetooth, Bluetooth Low Energy (BLE), and ANT

TiWi5 TRANSCEIVER MODULE
DATASHEET
WLAN POWER-UP SEQUENCE
The following sequence describes device power-up from shutdown. Only the WLAN Core is enabled; the
Bluetooth and FM cores are disabled.
Figure 3 TiWi5 Power-up Sequence Requirements
1. No signals are allowed on the IO pins if no IO power is supplied, because the IOs are not 'failsafe’.
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. Twakeup = T1 + T2
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
The information in this document is subject to change without notice.
330-0042-R2.0
Copyright © 2011-2012 LS Research, LLC
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