Texas Instruments Incorporated

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GC1012B 3.3V DIGITAL TUNER

SLWS138B

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

3.0

CONTROL REGISTERS

The chip is configured and controlled through the use of 16 eight bit control registers. These

registers are accessed for reading or writing using the control bus pins (CS, WE, RE, A[0:3], and C[0:7])

described in the previous section. The register names and their addresses are:

ADDRESS

NAME

ADDRESS

NAME

0

FREQ byte 0

8

Output Mode

1

FREQ byte 1

9

Status

2

FREQ byte 2

10

One Shot

3

FREQ byte 3

11

Checksum

4

Sync mode

12

I-output byte 0

5

Filter mode

13

I-output byte 1

6

Gain Fraction

14

Q-output byte 0

7

Gain Exponent

15

Q-output byte 1

The following sections describe each of these registers. The type of each register bit is either R or

R/W indicating whether the bit is read only or read/write. All bits are active high.