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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

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

MEASUREMENTS

•

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

•

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

MAS9129

MS8323

MAS9191A

BATTERY

MANAGEMENT

AUDIO/DATA

PROCESSOR

VCTCXO

MICRO

CONTROLLER

SRAM

32kB

KEYPAD

LCD DISPLAY

RS232C

I/O

PORT

FLASH

64kB

RxD DTR TxD

3.0V/50mA

3.0V/100mA

LDO1

LDO2

DAC

OSC

OUT

XRESET

WATCHDOG

ON/OFF

SWITCH

BATTERY

INPUT

(3.4 -9.0 VDC)

BATTERY

CHARGER

(9.0 VDC/265mA)

RX

TX

TEST

POINTS

EAR PIECE

BUZZER

MIC

SERIAL

INTERFACE

Vcont