LG KF750 Service Manual page 36

D. Master Clock and Clock Request Interface
The master clock (MCLK) is a 26 MHz signal used as the high precision clock signal for the Bluetooth
module. The signal can be switched on and off by the platform. The master clock request (CLKREQ) is
used by the Bluetooth module to ask for the master clock.
If the Bluetooth module asserts the signal high, it gets the master clock. The other alternative for the
Bluetooth module is to set the clock request output to high impedance state, indicating that it does not
need the master clock. The Bluetooth module receives the master clock, if other parts of the chipset
request it.
E. Low Frequency Clock Interface
The low-frequency clock signal (RTCCLK) is used by the Bluetooth module as a low-power clock. The
clock is used in different Bluetooth modes, like sniff and park, to have a correct timing on the Bluetooth
air interface without having the master clock running.
The low-frequency clock is always present, in some applications even when the chipset is powered
down.
F. STLC2593C
■ WFBGA 5.0 x 7.5 x 0.8 mm lead-free/RoHs compliant 100 pins
■ External component: B-BPF (Bluetooth)
■ PCB footprint < 45mm2
■ Based on Ericsson Technology Licensing Baseband Core (EBC)
■ Bluetooth¢‚ specification compliance: V2.0 + EDR.
- Point-to-point, point-to-multi-point (up to 7 slaves) and scatternet capability
- Support ACL and SCO links
- Extended SCO (eSCO) links
- Faster Connection
■ HW support for packet types
- ACL: DM1, DM3, DM5, DH1, DH3, DH5, 2-DH1, 2-DH3, 2-DH5, 3-DH1, 3-DH3, 3-DH5
- SCO: HV1, HV3 and DV
- eSCO: EV3, EV4, EV5, 2-EV3, 2-EV5, 3-EV3, 3-EV5
- Adaptive Frequency Hopping (AFH)
■ Transmit Power
- Power Class 2 and Power Class 1.5 (above 4dBm)
- Programmable output power
- Power Class 1 compatible
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3. TECHNICAL BRIEF
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