Interface signals
Signal name I/O Function
RF
ANT_GPS I GPS antenna port
LNA_In I GPS ASIC RF input
Clocking
REF_CLK I Reference Clock = RF Cellular clock, Min 0.2V
pk-pk
GPS_CLK I Connection of 16.368MHz GPS TCXO
RTC_CLK I Cellular engine 32768 Hz sleep clock
Control
GPS_EN_RESET I GPS engine reset
AGPS_CLK_REQ O MCU Interrupt when GPS requires CE to be awake
(Host Wakeup)
IO_TIMESTAMP_DATAR
DY
I Strobe for accurately marking in real time,
timing information from the cellular engine.
DATARDY indication to download code through
synchronous operation from cellular engine.
IO_PA_EN I Used to implement PA blanking when cellular PA
is ON
Comms
I2C_SCL_U1TX B I2C clk line
I2C_SDA_U1RX B I2C data line
Power
VDDS P Cellular engine I/O supply
VBatt 1 & 3 P Phone battery power or SMPS power
VBatt 2 P Phone battery power
VSS P Ground plane
WLAN functional description
Functional description
The WLAN Size 4.0 module is a single component Wireless Local Area Network (WLAN) radio access technology
supporting the IEEE 802.11 standards, for low error rate data transfer between mobiles and WLAN networks.
It incorporates a highly optimised WLAN chipset for mobile applications where low cost, small physical size
and low power consumption are important attributes.
The Size 4.0 module houses a medium access controller (MAC) spread spectrum baseband processor with
direct conversion radio interface, a 2.4GHz RF Front End chip and Power Management (PM) IC. Data rates up
to 54Mbps are possible in 802.11g mode of operation.
RM-356
System Module and User Interface
Page 6 –18 COMPANY CONFIDENTIAL Issue 1
Copyright © 2008 Nokia. All rights reserved.
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