HT9015

12

April 10, 2000

Preliminary

0 ¼¼¼¼Operation

1 ¼¼¼¼Battery saving

Bit

Control Block

TX-RF

TX-PLL

TX-RF= 1 and

RX-RF= 1

LOCAL OSC= OFF

TX-AF

MIC AMP, Compressor, Splatter

RX-RF

RX-VCO, RX-PLL, 1st MIX, 2nd MIX IF AMP, NOISE DET,

DATA COMP, RSSI

RX-AF

Pre AMP, Expander, Receiver AMP

0 ¼¼¼¼normal

1 ¼¼¼¼MUTE

MUTE for Compressor output.

These bits prevent the compander block going into a battery saving mode. Current consumption

therefore does not decrease.

PLL loop performance such as lock-up time can be changed by these control bits.

Bit

Control Output

0

1

TX CP

TX-PLL Charge Pump Output Current

200mA

400mA

RX CP

RX-PLL Charge Pump Output Current

200mA

400mA

There are has four threshold levels for low battery detection.

These threshold levels are shown on the table below.

BA1

BA2

0

0

0

3.00V

0

0

1

3.25V

0

1

0

3.30V

0

1

1

3.45V

10

0

11

1