5

DA9191EB.006

June 30,1997

CONNECTOR DESCRIPTION

Connector name

Pin

Function

Battery

NiCd Battery or external DC power supply capable of driving at least 200 mA current is

connected to battery input.

B+

Positive supply voltage from 3.4 V to 9.0V DC.

B-

Ground.

S1

ON/OFF power switch for MAS9129 voltage regulators.

CM1

This jumper is normally closed, but can be opened to use an external current meter to

measure the power consumption of the digital section.

1

Regulator 1 output.

2

VDD input.

CM2

This jumper is normally closed, but can be opened to use an external current meter to

measure the power consumption of the analog section.

1

Regulator 2 output.

2

VDD input.

MIC

The microphone is normally connected to this connector. See the microphone function.

1

Microphone input.

2

Ground.

J1

The internal/external microphone select switches.

1

Microphone amplifier feedback signal. Connect to pin 3 to use the mounted

microphone. Otherwise, connect the external microphone circuit feedback

signal to this pin.

2

Microphone amplifier input. Connect this to pin 4 to use the mounted

microphone. Otherwise, connect the external microphone output signal to this

pin.

3

Feedback signal input for the assembled microphone circuit.

4

Microphone output signal for the assembled microphone circuit.

J2

Use jumper to enable regulator 2.

EXTMIC

BNC-type connector for external microphone source.

1

External microphone input.

2

Ground.

T2

MICOUT signal is the output from the section which contains the following blocks: Filter F8,

Gain Control GC3 and Filter F9. The source for the signal is either from SGND, Microphone

amplifier A6, EXTMIC input or from DTMF generator.

T3

COUT is the compressor output signal. The compressor and all the blocks before T2 can be

measured by using this test point.

T4

LPFIN test point can be used as an output to measure gain controls GC4 and GC5, the filter

F10 and all the blocks before T3.

T5

TAUDOUT is the output from the TX audio block.

CM3

1

VDD from regulator 2.

2

MASVDD. Power input for MAS9191A. Current measurement point.

CM4

1

Battery and charging voltage output.

2

Power input for MAS9129. Current measurement point.

CM5

1

VDD from regulator 2.

2

Power input for MS8323. Current measurement point.