DA9191EB.006
June 30,1997
MAS9191EB
EVALUATION BOARD FOR CELLULAR BASEBAND ICs
•
Audio/Data Processor and all necessary external components
•
Battery Management IC and battery protection/charging circuit
•
VCTCXO with DAC voltage control
•
uP with evaluation software
DESCRIPTION
The Cellular Baseband evaluation board includes
MAS9191A (Audio/Data Processor), MAS9129
(Battery Management) and MS8323 (VCTCXO) ICs
with all needed external components and software.
The two regulators of MAS9129 provide all the power
for the board. The board has BNC connectors for
typical MAS9191A interfaces. By using customised
software and external RF parts the complete
evaluation of an AMPS/ ETACS/ NAMPS phone can
be performed. A general purpose micro controller is
used to control the MAS9191A internal registers
through a serial bus interface. For the micro controller
there is 32kB SRAM, 64kB FLASH, an LCD, a keypad
and an RS-232-C interface for software downloading
to SRAM or FLASH. There is also a direct interface to
the MAS9191A serial bus allowing an external
controller to be used.
FEATURES
•
•
•
•
•
•
•
•
•
Fully operational system (only NiCd/NiMH battery
or power supply needed)
Connectors to Rx,Tx,microphone, ear piece, etc.
Several test points for audio block
Battery charger input (9.0VDC/265mA)
Micro controller with 32kB SRAM, 64kB FLASH
Keyboard and 2-line/16-character LCD
RS-232-C interface for software downloading
External micro controller connector
3.4 - 9.0 NiCd/NiMH battery input or power supply
MEASUREMENTS
•
•
•
•
•
•
•
•
•
•
Regulator voltage and current
Receive and transmit frequency responses
Send and receive messages
Microphone and Rx audio levels
SAT detection and generation
Signalling Tone level
DTMF detection and generation
Gain control levels
Expander and compressor functionality
VCTCXO output signal
BLOCK DIAGRAM
ON/OFF
SWITCH
RX
MAS9129
LDO2
3.0V/50mA
MAS9191A
MIC
BATTERY
INPUT
(3.4 -9.0 VDC)
BUZZER
BATTERY
MANAGEMENT
BATTERY
CHARGER
(9.0 VDC/265mA)
XRESET
WATCHDOG
MICRO
CONTROLLER
EAR PIECE
SERIAL
INTERFACE
TEST
POINTS
AUDIO/DATA
PROCESSOR
LDO1
3.0V/100mA
DAC
TX
LCD DISPLAY
Vcont
MS8323
OSC
OUT
VCTCXO
KEYPAD
SRAM
32kB
FLASH
64kB
I/O
PORT
RS232C
RxD DTR TxD
1
MAS [ MICRO ANALOG SYSTEMS ]
