參數(shù)資料
型號(hào): TAS5028PAGRG4
廠商: Texas Instruments, Inc.
英文描述: 8 Channel Digital Audio PWM Processor
中文描述: 8通道數(shù)字音頻PWM處理器
文件頁(yè)數(shù): 34/84頁(yè)
文件大?。?/td> 1051K
代理商: TAS5028PAGRG4
TAS5028 Controls and Status
26
SLES112 — June 2004
TAS5028
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
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
I
2
S 24 bit
Serial data interface format
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
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
Master volume
Mute
Individual channel volumes
0 dB
All bass and treble Indexes
0x12 neutral
Treble filter sets
Filter Set 3
Bass filter sets
Filter Set 3
AM interference enable
Disabled
AM interference IF
455
AM interference select sequence
1
Tuned freq and mode
0000 , BCD
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