LG CG225 Service Manual page 23

3. H/W Circuit Description
3.4.3. RF Interface (TPU, TSP Block)
Calypso uses this interface to control IOTA_CS(ABB Processor) and AERO(RF Processor) with GSM
Time Base
Resource
TSPDO
TSPDI/IO(4)
TSPEN0
TSPEN1
TSPCLKX
TSPACT0
TSPACT01
TSPACT02
TSPACT03
TSPACT04
TSP (Time Serial Port)
Interconnection
ABB & RF main Chip
GPIO4
ABB
STROBE
CLK
TPU (Parallel Port)
PDNB
PA_ON
PA_BAND
ANT_SW1
ANT_SW2
Table 3-4. RF Interface Spec.
- 22 -
Description
Control Data
ABB Control Data Enable Signal
STROBE Control Data Enable Signal
CLK Control Data Enable Signal
RF main Chip Reset Signal
Power Amp ON signal
Power Amp band-selection signal
FEM control signal
FEM control signal