User Manual

MPA Project Document DOC #
XWING1 Users Guide
Copyright 2011 Motorola Solutions, Inc.
20110307-A 18 of 20
Confidential Material – Disclosure Strictly Prohibited.
2.1. Power Sub System
The XW1 3.3V only BOM requires one external voltage source : VBAT=3.3V nominal.
The VBAT is used to supply voltage to the SoC, FEM, the LDO, SMPS, and the
antenna selection level translator. The SMPS supplies an internal 1.8V to the SoC.
The LDO supplies an internal 1.8V that is used to supply the Soc Digital circuits,
digital level translators and power to the 26MHz TCXO.
2.2. Internal Clock Frequencies
The XW1 has on-module TCXO operating at 26MHz
2.2.1. WLAN
WLAN has an Zero-IF architecture and thus the LO operates at ~10GHz that is divided
by 2 for 5G Band operation and divided by 4 for 2.4GHz Band operation.
2.2.2. BT
The TCXO is used to produce the relevant BT channel, between 2.402G to 2.480GHz.
The ADPLL produces the frequencies between 4.804GHz to 4.96GHz, which divided by
2 to provide the BT frequencies.