TI Confidential - NDA Restrictions

LM49151

www.ti.com

SNAS482F – MARCH 2009 – REVISED MARCH 2013

Table 3. Shutdown Control (continued)

Bit

Name

Value

Description

This disables the gain amplifiers that are not in use to minimize IDD. This setting is recommended

for output modes 1, 2, 4, 5, 8, 10.

GAMP_SD

Status

B4

GAMP_SD

0

Normal operation

1

Disable the unused gain amplifiers

MODE CONTROL REGISTER

This register is used to control shutdown operation of the device.

Table 4. Output Mode Selection (see legend below(1))

Bits

Field

Description

B3:B0

MODE

This set the different mixers output modes.

_CONTROL

Mode_

Mode

Loudspeaker

Headphone Right

Headphone Left

Control

0000

0

SD

SD

SD

0001

1

GM x M

SD

SD

0010

2

2 x (GL x L + GR x R)

SD

SD

2 x (GL x L + GR x R)

0011

3

SD

SD

+ GM x M

0100

4

SD

GM x M/2

GM x M/2

0101

5

GM x M

GM x M/2

GM x M/2

0110

6

2 x (GL x L + GR x R)

GM x M/2

GM x M/2

2 x (GL x L + GR x R) +

0111

7

GM x M/2

GM x M/2

GM x M

1000

8

SD

GR x R

GL x L

1001

9

GM x M

GR x R

GL x L

1010

10

2 x (GL x L + GR x R)

GR x R

GL x L

2 x (GL x L + GR x R)

1011

11

GR x R

GL x L

+ GM x M

1100

12

SD

GR x R + GM x M/2

GL x L + GM x M/2

1101

13

GM x M

GR x R + GM x M/2

GL x L + GM x M/2

1110

14

2 x (GL x L + GR x R)

GR x R + GM x M/2

GL x L + GM x M/2

2 x (GL x L + GR x R)

1111

15

GR x R + GM x M/2

GL x L + GM x M/2

+ GM x M

B4

EP_BYPASS

This makes the loudspeaker and headphone amplifiers into shutdown mode and enables receiver bypass

path.

0

Normal output mode operation

1

Enable the receiver bypass path

(1)

M: Mono differential input

R: Right channel stereo input

L: Left channel stereo input

SD: Shutdown

GM : Differential input gain path

GR: Right channel input gain path

GL: Left channel input gain path

Copyright © 2009–2013, Texas Instruments Incorporated

Submit Documentation Feedback

21

Product Folder Links: LM49151