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| 型号： | TAS5026APAG |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 15/64页 |
| 文件大小： | 936K |
| 代理商： | TAS5026APAG |
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Architecture Overview
16
SLES068A—February 2003—Revised January 2004
TAS5026A
Table 26. Device Outputs During Reset
SIGNAL
MODE
SIGNAL STATE
Valid 1Valid 6
All
Low
PWM P-outputs
All
Low
PWM M-outputs
All
Low
MCLKOUT
All
Low
SCLK
Master
Low
SCLK
Slave
Signal input
LRCLK
Master
Low
LRCLK
Slave
Signal input
SDA
All
Signal input
CLIP
All
High
Because the RESET is an asynchronous control signal, small clicks and pops can be produced during the
application (the leading edge) of this control. However, when RESET is released, the transition from the hard
mute state back to normal operation is performed synchronously using a quiet sequence.
If a completely quiet reset sequence is desired, MUTE should be applied before applying RESET.
Table 27. Values Set During Reset
CONTROL
SETTING
Volume
0 dB
MCLK_IN frequency
256
Master/slave mode
M_S terminal state
Automute
Enabled
De-emphasis
None
DC offset
0
Interchannel delay
Each channel is set to a default value
2.2.2 Power Down—PDN
The TAS5026A can be placed into the power-down mode by holding the PDN terminal low. When power-down
mode is entered, both the PLL and the oscillator are shut down. Volume is immediately set to full attenuation
(there is no ramp down). The valid 16 outputs are immediately asserted low and the PWM outputs are placed
in the hard mute state. PDN initiates device power down without clock inputs. As long as the PDN terminal
is held low—the device is in the power-down (hard mute) state.
During power down, all I2C and serial data bus operations are ignored. Table 28 shows the device output
signals while PDN is active.
Table 28. Device Outputs During Power Down
SIGNAL
MODE
SIGNAL STATE
Valid 1Valid 6
All
Low
PWM P-outputs
All
Low
PWM M-outputs
All
Low
MCLKOUT
All
Low
SCLK
Master
Low
SCLK
Slave
Signal input
LRCLK
Master
Low
LRCLK
Slave
Signal input
SDA
All
Signal input
CLIP
All
High
To place the device in total power-down mode, both RESET and power-down modes must be enabled. Prior
to bringing PDN high, RESET must be brought low for a minimum of 50 ns.
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