Texas Instruments Incorporated

- 11 -

GC1012B 3.3V DIGITAL TUNER

SLWS138B

This document contains information which may be changed at any time without notice

3.1

FREQUENCY WORD REGISTERS

Registers 0, 1, 2, and 3 contain the 28 bit frequency tuning word. Bit 0 is the LSB, bit 27 is the MSB.

ADDRESS 0:

FREQUENCY BYTE 0

BIT

TYPE

NAME

DESCRIPTION

0-7

R/W

FREQ[0:7]

Byte 0 (least significant) of frequency word

ADDRESS 1:

FREQUENCY BYTE 1

BIT

TYPE

NAME

DESCRIPTION

0-7

R/W

FREQ[8:15]

Byte 1 of frequency word

ADDRESS 2:

FREQUENCY BYTE 2

BIT

TYPE

NAME

DESCRIPTION

0-7

R/W

FREQ[16:23]

Byte 2 of frequency word

ADDRESS 3:

FREQUENCY BYTE 3

BIT

TYPE

NAME

DESCRIPTION

0-3

R/W

FREQ[24:27]

4 most significant bits of the frequency word

4-7

R/W

-

unused

If the desired tuning frequency is F, then the frequency word should be set to: