LG L240 Service Manual page 18

3.2.4.2 DigRF
Interface to the baseband IC using the DigRF standard. The DigRF standard specifies the logical,
electrical, and timing details of the RF/Baseband interface. Figure 5 shows the DigRF standard RF-
baseband interface.
Baseband
<Fig.5> DigRF Standard RF-BaseBand Interface
3.2.4.3 Transmit Module (TXM)
The EDGE/GMSK digital transmit module (TXM) contains two modulation schemes (GMSK and
8PSK) and supports amplitude/phase (polar pair), or amplitude/frequency modulation.
3.2.4.4 Transmit/Receiver Timing Sequencer (TRXQ)
This module generates appropriate timing events for the transmitter calibration and the EDGE/GMSK
transmit/receive burst, therefore, limiting the RF hardware dependency of the L1 engine software to
the absolute minimum.
3.2.5 26MHz Clock
The 26MHz clock consists of a TCXO, which oscillates at a frequency of 26 MHz. It is used within the
RF Main Chip [MMM6000], ABB [Triton], DBB [Neptune] and B/T [BRF6150].
3.2.6 Power Supplies [LDO]
The external LDOs are used to provide DC power to TCXO, RF Main Chip [MMM6000] and PAM
[MMM6027]
RxTxDat a
RxTxEn
Ct r l Dat a
Ct r l En
Ct r l Cl k
IC
St r obe
SysC lk
SysC lkE n
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3. Circuit Description
RF I C