External Devices Connected To Memory Interface; Rf Interface (Tpu, Tsp Block); Sim Interface - LG L1150 Service Manual

3. H/W Circuit Description

3.2.3. External Devices connected to memory interface

Device
FLASH
SRAM
LCD
Melody IC

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.
TSP (Time Serial Port)
Resource
TSPDO
TSPEN0
TSPEN1
TPU (Time Processing Unit) Parallel Port
TSPACT00
TSPACT05

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
Table 3-2. Memory interface
Name
AM50DL128CH
AM50DL128CG70I
NM186TB-2
YMU762
Table 3-3. RF Interface Spec.
Interconnection
ABB & RF main Chip
ABB
RF main Chip
RESET_RF
PA_ON
- 24 -
Maker Write
Access Time
AMD 70ns
AMD 70ns
NEODIS 130ns
Yamaha 50ns
Description
Control Data
ABB Control Data Enable Signal
RF Control Data Enable Signal
RF main Chip Reset Signal
Power Amp ON signal
Read
Access Time
70ns
70ns
50ns
80ns