Nokia RM-555 Service Manual page 207

RM-555
System Module and User Interface
The GPS module is powered from VIO 1.8V and VBAT.
Block diagram
The following block diagram shows how the GPS module is connected to the host side.
Interface signals
Signal name
RF
ANT_GPS
LNA_In
Clocking
REF_CLK
GPS_CLK
RTC_CLK
Control
GPS_EN_RESET
AGPS_CLK_REQ
Issue 1
Figure 69 Block diagram of the GPS system
I/O
I
I
I
I
I
I
O
COMPANY CONFIDENTIAL
Copyright © 2009 Nokia. All rights reserved.
Function
GPS antenna port
GPS ASIC RF input
Reference Clock = RF Cellular clock, Min 0.2V
Connection of 16.368MHz GPS TCXO
Cellular engine 32768 Hz sleep clock
GPS engine reset
MCU Interrupt when GPS requires CE to be awake
(Host Wakeup)
pk-pk
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