TMS57014A

DUAL AUDIO DIGITAL-TO-ANALOG CONVERTER

SLAS077D – SEPTEMBER 1993 – REVISED NOVEMBER 1995

7

POST OFFICE BOX 655303

register set

Table 2 contains the register-set selection. Tables 3 and 4 list the bit functions.

Table 2. Register-Set Selection

BITS

DESCRIPTION

15

14

DESCRIPTION

0

0

Attenuation register

0

1

System register

1

x

Invalid condition†

† Bit 15 should always be set to 0 when writing

data for proper operation.

Table 3. Attenuation-Register Bit Functions

BITS‡

FUNCTION

13

12

11

10 – 0

FUNCTION

0

—

—

—

De-emphasis off

1

—

—

—

De-emphasis on

—

0

—

—

Channel mute off

—

1

—

—

Channel mute on

—

—

0

—

Bit 11 must be low

—

—

—

0

Digital attenuation, mute

—

—

—

1

Digital attenuation, – 60.2 dB§

—

—

—

2

Digital attenuation, – 54.2 dB§

—

—

—

3

Digital attenuation, – 50.7 dB§

—

—

—

. . .

—

—

—

1FF

Digital attenuation, – 6.04 dB§

—

—

—

200

Digital attenuation, – 6.02 dB§

—

—

—

201

Digital attenuation, – 6.00 dB§

—

—

—

. . .

—

—

—

3FF

Digital attenuation, – 0.01 dB§

—

—

—

400

Digital attenuation, 0.00 dB§

‡ Default value = 0400h

§ The attenuation values shown are typical values. Refer to the digital

attenuation section for a description of the attenuation function.