Gps Interface - Nokia RM-609 Service Manual

RM-609
System Module
Figure 45 BOB1.0M-b interface

GPS interface

The phone includes an inbuilt single chip GPS receiver GPSCost4.1D, comprising both RF and BB blocks
integrated in a single digital die. GPSCost4.1D is connected to RAPU ASIC via I2C_1 and some GENIOs. GPSCost4.1
D operates in Multi-master mode and the REF clock is requested via AGPS_CLK_REQ signal connected to RAPU
genio46. REFOUT_EXT2 single ended 38.4 MHz analog clock from Linko RF is provided to GPSCost4.1D.
Figure 46 GPS interface
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