AD20MSP410 Analog Devices, Inc., AD20MSP410 Datasheet - Page 6

• Manufacturer Part Number: AD20MSP410
• Description: Gsm Baseband Processing Chipset
• Manufacturer: Analog Devices, Inc.

Digital Audio Interface (DAI)
As required by the GSM specifications, a digital audio interface
is provided to allow certain tests of the audio section during type
approval. This interface is provided by the serial bus between
the ASP and the PLP and two additional control signals from
the PLP. A fully functional “DAI Box” needed for the FTA
process may be obtained from Analog Devices upon request.
Digital Interface to the PLP for Data Services
A conventional H8 serial port combined with a proprietary
protocol is used to interface to an external Data Terminal
Adapter.
Digital Interface from the PLP to the EEPROM
The PLP provides separate pins to interface directly to an
external EEPROM via a serial port. This EEPROM is typically
used for storage of calibration or user variable parameters like
handset identifier (IMEI), language, keypad lock and radio
calibration parameters. A typical size of the EEPROM is 2K 8
bits, but this depends on the individual design of the handset.
GSM Baseband Processing Key Parts List
Table 1 lists the major hardware components necessary to
complete the GSM baseband processing subsystem. An example
Bill Of Material is available from Analog Devices. A full
reference design is available through Analog Devices/The
Technology Partnership.
AD20msp410
INTERFACE
KEYPAD
KEYPAD
DATA
SIM
INTERFACE
SERIAL PORT
ADDRESS
DATA
PSRAM
CONTROL
DISPLAY
CONTROL
BACKLIGHT
CONTROL
KEYPAD
INTERFACE
EEPROM
INTERFACE
DATA
INTERFACE
PLP
SYNTHESIZER
DAI CONTROL
INTERFACE
AND RADIO
CONTROL
CONTROL
POWER
ASP
Figure 5. System Interfaces
CLOCK
VCTCXO
13MHz
ADDRESS
DATA BUS
SUBSYSTEM
ASP
POWER
–6–
SPORT 0
SPORT 1
INTERFACE
Quantity
1
1
1
1
1
1
1
NOTES
1
2
3
These components comprise the AD20msp410 chipset.
A size of 4 Mbits is recommended to allow storage of all GSM Layer
Can be omitted if parameters are stored in FLASH memory.
(1, 2, 3) programs as well as a typical user interface (MMI). Larger
memory can be used to support enhanced user interfaces.
DAI
AUX DAC 2
(AFC)
VOICEBAND
SERIAL PORT
BASEBAND
SERIAL PORT
AUX ADC
Table I. List of Key Components
Description
ASP
PLP
BBC
FLASH-PROM
SRAM
EEPROM
Display Driver
BBC
1
1
1
VOICEBAND
ANALOG I/O
ANALOG I/O
BASEBAND
AUX DAC 1
AUX DAC 3
(AGC)
(AGC)
3
2
Specification
ADSP-2178
ADPLP01
AD7015
256K
128K
2K
Design Specific
DEMODULATOR
SYNTHESIZER
MODULATOR
AND RADIO
AMPLIFIER
AMPLIFIER
RADIO
CONTROL
8
CAR KIT
POWER
16, 150 ns
8, 120 ns
IF
REV. 0