LM49200, LM49200TLEVAL

SNAS459A – MAY 2009 – REVISED APRIL 2013

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Table 4. Output Mode Control Register(1)

Bits

Field

Description

3:0

Mode_Control

These bits determine how the input signals are mixed and routed to the outputs.

Right

Value

Mode

Left Loudspeaker

Left Headphone

Right Headphone

Loudspeaker

0000

0

SD

SD

SD

SD

0001

1

GM x M

GM x M

Mute

Mute

0010

2

GL x L

GL x L

Mute

Mute

011

3

GL x L + GM x M

GR x R + GM x M

Mute

Mute

0100

4

SD

SD

GM x M/2

GM x M/2

0101

5

GM x M

GM x M

GM x M/2

GM x M/2

0110

6

GL x L

GR x R

GM x M/2

GM x M/2

0111

7

GL x L + GM x M

GL x L + GM x M

GM x M/2

GM x M/2

1000

8

SD

SD

GL x L

GR x R

1001

9

GM x M

GM x M

GL x L

GR x R

1010

10

GL x L

GR x R

GL x L

GR x R

1011

11

GL x L + GM x M

GR x R + GM x M

GL x L

GR x R

1100

12

SD

SD

GL x L + GM x M/2

GR x R + GM x M/2

1101

13

GM x M

GM x M

GL x L + GM x M/2

GR x R + GM x M/2

1110

14

GL x L

GR x R

GL x L + GM x M/2

GR x R + GM x M/2

1111

15

GL x L + GM x M

GR x R + GM x M

GL x L + GM x M/2

GR x R + GM x M/2

4

EP Mode

This bit sets the loudspeaker amplifiers for earpiece mode.

Value

Status

0

Normal loudspeaker operation, control determined by bits 3:0.

Bit overrides bits 3:0. Right loudspeaker amplifier bias current reduced for low power operation. Left

1

loudspeaker amplifier shutdown. Mono input path active and signal routed to right loudspeaker

output. Left & right input gain amplifiers shutdown for reduced power consumption.

(1)

M : MIN, Mono differential input

L : LIN, Left single-ended input

R : RIN, Right single-ended input

SD : Shutdown

GM : Mono_Vol setting determined by the Mono Input Volume Control register, See Table 6.

GL : Left_Vol setting determined by the Left Input Volume Control register, See Table 6.

GR : Right_Vol setting determined by the Right Input Volume Control register, See Table 6.

Table 5. Output Gain Control Register

Bits

Field

Description

2:0

HP_GAIN

These bits set the gain of the headphone output amplifiers.

Value

Gain (dB)

000

0

001

–1.2

010

–2.5

011

–4.0

100

–6.0

101

–8.5

110

–12

111

–18

16

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