LG F1200 Service Manual page 22

(3) RF Interface (TPU, TSP block)
Calypso-Plus uses this interface to control ABB Processor and RF Processor with GSM
Time Base.
TSP (Time Serial Port)
Resource
TSPDO
TSPEN0
TSPEN1
TPU (Time Processing Unit) Parallel Port
TSPACT00
TSPACT01
(4) SIM interface
SIM interface scheme is shown in (Figure 9.). 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_RST
SIM_CLK
SIM_IO
SIM_CLK : SIM Card reference clock
SIM_RST : SIM Card async/sync reset
SIM_IO : SIM Card bi-directional data line
Interconnection
ABB & RF main Chip
ABB
RF main Chip
RESET_RF
PA_ON
Table 5. RF Interface Spec.
V_SIM
R230
10K
C235 C236
150p 22p
Figure 9. SIM Interface
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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
C230
0.1u
J1
1
GND
VCC
2
RST VPP
3
CLK IO
SIM_SOCKET
SIM_PWCTRL : SIM Card power activation
SIM_RnW : SIM Card data line direction
SIM_CD : SIM Card presence detection
3. TECHNICAL BRIEF
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