REFOUT_EXT1 single ended 38.4 MHz analog clock from Linko RF is provided to BOB1.0M-b. The clock request
for the reference clock in the BOB1.0M-b module is shared between WLAN and BTHFM blocks. When either
system requires a clock, this signal will be active. The CLK_REQ is connected to ExtSysClkReq pin of RAPU. The
SLEEPCLK input of 32.768 KHz clock from EM ASIC is used for power management and for FM in low power
mode.
The internal SMPS supplies the whole BOB1.0M-b solution from the phone battery supply, VBAT, apart from
VIO which is needed for interface signal reference levels.
Figure 48 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.
RM-626
System Module
Page 6 – 18
COMPANY CONFIDENTIAL
Issue 1
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