AS3977 datasheet(31/47 Pages) AMSCO

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AS3977

Data Sheet - A p p l i c a t i o n I n f o r m a t i o n

Modulation and Power Amplifier section

I<7:0>

GFCS

<7:0>

application dependent

Gaussian filter clock setting

I<15:8>

DF<7:0>

application dependent

FSK deviation setting

J<0>

GFBP

Gaussian filter bypass

0: not bypassed

1: bypassed

J<1>

REGEN

0: Turn off the VDD RF Regulator

1: Turn on the VDD RF Regulator

J<5:2>

0000

reserved Bits: set to Binary 0000 for normal mode of

operation

J<6>

reserved

reserved Bit should be set to 0

J<10:7>

ATCPH

<3:0>

0000

Antenna tuning circuit phase shift setting

0 (0000): minimum capacitor

15 (1111): maximum capacitor

J<12:11>

RPAOV1

<1:0>

PA voltage regulator setting 1

0 (00): VREG=1.7V

1 (01): VREG=1.8V

2 (10): VREG=1.9V

3 (11): VREG=2.0V

J<14:13>

PAOP1

<1:0>

application dependent

Power amplifier power level setting 1

0 (00): maximum power

3 (11): minimum power

J<15>

PREOP1

<4:0>

application dependent

Preamplifier power level setting 1

0 (00000): power off

1 (00001): minimum power

31 (11111): maximum power

K<3:0>

K<4>

FSK1

Modulation type selection 1

0: FSK

1: reserved for test purposes only

K<5>

Lock transmit, active=high

K<6>

Low power supply indicator, active=high

K<8:7>

RPAOV2

<1:0>

PA voltage regulator setting 2

0 (00): VREG=1.7V

1 (01): VREG=1.8V

2 (10): VREG=1.9V

3 (11): VREG=2.0V

K<10:9>

PAOP2

<1:0>

application dependent

Power amplifier power level setting 2

0 (00): maximum power

3 (11): minimum power

Table 23. Configuration Registers Description

Name

Default Value

Description

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