User's Manual

Doc. No.: WFC008-A009
Date: 7, September 2012
4. Block Diagram
F9195KH
RF
IN/OUT
Antenna
Variable
ATT
WLAN
Chip Module
3.3V DC/DC
Regulator
V_IN
Clock
Host IF
3.3Vdc
Host IF
Connector
SPI
Figure1 System Block Diagram
5. Theory of operation
5.1. Power Supply
The primary power supply input V_IN is supplied via the host interface connector. The Usable input voltage range
for V_IN is 4.5Vdc to 5.5Vdc. This Module have 3.3V DC/DC regulator which convert from the V_IN to regulated
3.3Vdc. The 3.3V DC/DC regulator supplies a regulated 3.3Vdc to the RF circuitry include WLAN Chip module
and the other logic ICs.
5.2. Clock
The 40MHz external clock is provided via the host interface connector.
5.3. WLAN Chip Module
The WLAN Chip Module is a single package device that contains dual band (2.4GHz/5GHz) IEEE802.11b/g/a
client function with a SPI interface to a host processor. It integrates a MAC, Baseband processor, dual band RF
transceiver with power amplifier and diplexer and all WLAN protocols.