TAS5518 datasheet(43/102 Pages) TI

43 / 102 page

TAS5518 Controls and Status

SLES115 — August 2004

TAS5518

Because RESET is an asynchronous signal, clicks and pops produced during the application (the leading

edge) of RESET cannot be avoided. However, the transition from the hard mute state (M) to the operational

state is performed using a quiet start up sequence to minimize noise. This control uses the PWM reset and

unmute sequence to shut down and start up the PWM. A detailed description of these sequences is contained

in the PWM section. If a completely quiet reset or power down sequence is desired, MUTE should be applied

before applying RESET.

The rising edge of the reset pulse begins device initialization before the transition to the operational mode.

During device initialization, all controls are reset to their initial states. Table 2−2 shows the default control

settings following a reset.

Table 2−2. Values Set During Reset

CONTROL

SETTING

Clock register

Not valid

High pass

Disabled

Unmute from clock error

Hard unmute

PSVC high Z

Disabled

Post DAP detection automute

Enabled

Eight Ch PreDAP detection automute

Enabled

De−emphasis

De-emphasis disabled

Channel configuration control

Configured for the default setting

Headphone configuration control

Configured for the default setting

Serial data interface format

I2S 24 bit

Individual channel mute

No channels are muted

Automute delay

5 ms

Automute threshold 1

< 8 bits

Automute threshold 2

Same as automute threshold 1

Modulation limit

Maximum modulation limit of 97.7%

Six (or eight – low) channel configuration

Eight channels

Slew rate limit

Disengaged for all channels

Interchannel delay

−32, 0, –16, 16, –24, 8, –8, −24

Shutdown PWM on error

Enabled

Volume and mute update rate

Volume ramp 85 ms

Treble and bass slew rate

Update every 1.31 ms

Bank switching

Manual bank selection is enabled

Auto bank switching map

All channels use Bank 1

Biquad coefficients (5508)

Set to All pass

Input mixer coefficients

Input N −> Channel N, no attenuation

Output mixer coefficients

Channel N −> Output N, no attenuation

Subwoofer sum into Ch1 and 2 (5508)

Gain of 0

Ch1 and 2 sum in subwoofer (5508)

Gain of 0

Bass and treble bypass

Gain of 1

Bass and treble Inline

Gain of 0

DRC bypass (5508)

Gain of 1

DRC inline (5508)

Gain of 0

DRC (5508)

DRC disabled, default values

Master volume

Mute

Individual channel volumes

0 dB

All bass and treble Indexes

0x12 neutral

Treble filter sets

Filter Set 3

TAS5518 датащи(PDF) 43 Page - Texas Instruments

TAS5518 датащи(HTML) 43 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL