LG L1150, Service Manual

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3. H/W Circuit Description
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3.2.3. External Devices connected to memory interface
3.2.4. RF Interface (TPU, TSP block)
Calypso uses this interface to control IOTA_CS(ABB Processor) and AERO(RF Processor) with GSM
Time Base.
3.2.5. SIM interface
SIM interface scheme is shown in (Figure 10).
SIM_IO, SIM_CLK, SIM_RST ports are used to communicate DBB with ABB and the Charge Pump in
ABB enables 3V SIM operation.
SIM Interface
]
SIM_CLK ------------- SIM card reference clock
] SIM_RST ------------- SIM card async/sync reset
] SIM_IO ---------------- SIM card bidirectional reset
Device Name Maker Write Read
Access Time Access Time
FLASH AM50DL128CH AMD 70ns 70ns
SRAM AM50DL128CG70I AMD 70ns 70ns
LCD NM186TB-2 NEODIS 130ns 50ns
Melody IC YMU762 Yamaha 50ns 80ns
Table 3-2. Memory interface
TSP (Time Serial Port)
Resource Interconnection Description
TSPDO ABB & RF main Chip Control Data
TSPEN0 ABB ABB Control Data Enable Signal
TSPEN1 RF main Chip RF Control Data Enable Signal
TPU (Time Processing Unit) Parallel Port
TSPACT00 RESET_RF RF main Chip Reset Signal
TSPACT05 PA_ON Power Amp ON signal
Table 3-3. RF Interface Spec.