LG MG810c Service Manual page 23

3. H/W Circuit Description
C. RF Interface (TPU, TSP block)
Calypso-Plus uses this interface to control ABB Processor and RF Processor with GSM Time Base.
Resource
TSPDO
TSPEN0
TSPEN1
TSPACT00
TSPACT01
D. SIM interface
SIM interface scheme is shown in (Figure 8.). SIM_IO, SIM_CLK, SIM_RST ports are used to
communicate DBB with ABB and the Charge Pump in ABB enables 1.8V/3V SIM operation
SIM_CLK : SIM Card reference clock
SIM_RST : SIM Card async/sync reset
SIM_IO : SIM Card bi-directional data line
TSP (Time Serial Port)
Interconnection
ABB & RF main Chip
ABB
RF main Chip
TPU (Time Processing Unit) Parallel Port
RESET_RF
PA_ON
Table 5. RF Interface Spec.
SIM I/O CKTs
V_SIM
CN203
GND VCC
VPP RST
SIM_IO I_O CLK
C224
22p
C223 0.1u
Figure 8. SIM Interface
SIM_PWCTRL : SIM Card power activation
SIM_RnW : SIM Card data line direction
SIM_CD : SIM Card presence detection
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Description
Control Data
ABB Control Data Enable Signal
RF Control Data Enable Signal
RF main Chip Reset Signal
Power Amp ON signal
V_SIM
SIM_RST
SIM_CLK
C225 C226 C227
1u 150p 150p