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Revision 3.6

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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

9.6 Transmitter Configuration Register

All configuration registers are readable and writable. The registers are arranged as addressable bytes. The first byte (A<7:0>) is addressed by 0,

the consecutive bytes (A<15:8>, B<7:0>, etc.) are addressed by 1,2, etc. The configuration register settings (except the registers with default

setting when entering or leaving the Power down mode), do not alter during Power down mode as long as the minimum supply requirements are

met.

Default settings given are recommendations according to application note (not set at power up).

Table 22. Configuration Registers

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

A

reserved

CPSC

<1:0>

DIVR

<2:0>

ARSDRS

<1:0>

BSEL

<1:0>

B

FRAC1<10:0>

C

INT1<9:0>

FRAC1<15:11>

D

FRAC2<15:0>

E

FRAC3<5:0>

INT2<9:0>

F

INT3<5:0>

FRAC3<15:6>

G

FRAC4<11:0>

INT3<9:6>

H

reserved

INT4<9:0>

FRAC4<15:12>

I

DF<7:0>

GFCS<7:0>

J

PAOP1

<1:0>

RPAOV1

ATCPH<3:0>

reserved

K

PREOP2<4:0>

PAOP2

<1:0>

RPAOV2

<1:0>

LS

LT

FSK1

PREOP1<4:1>

L

PSC

<0>

CLKS<1:0>

MCCDS

<2:0>

MCCS

<1:0>

reserved

FSK2

M

reserved

ASC<1:0>

TCV<7:0>

PSC<2:1>

N

reserved

reserved

O

reserved

LD

TS<9:0>

Table 23. Configuration Registers Description

Register

Name

Default Value

Description

Synthesizer section

A<1:0>

SEL<1:0>

application dependent

Frequency band selection

0 (00): 315MHz frequency band

1 (01): 434 MHz and ARIB frequency band

2 (10): 868MHz frequency band

3 (11): 915MHz frequency band

A<2>

ARSRST

0

Automatic range select reset, active high