參數(shù)資料
型號(hào)： TAS5709PHPRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 音頻／視頻放大
英文描述： 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
封裝： 7 X 7 MM, GREEN, PLASTIC, HTQFP-48
文件頁(yè)數(shù)： 42/60頁(yè)
文件大?。?/td> 1210K
代理商： TAS5709PHPRG4
OSCILLATOR TRIM REGISTER (0x1B)
BKND_ERR REGISTER (0x1C)
www.ti.com ..................................................................................................................................... SLOS599A – NOVEMBER 2008 – REVISED SEPTEMBER 2009
The TAS5709 PWM processor contains an internal oscillator to support autodetect of I2S clock rates. This
reduces system cost because an external reference is not required. Currently, TI recommends a reference
resistor value of 18.2 k
(1%). This should be connected between OSC_RES and DVSSO.
Writing 0X00 to reg 0X1B enables the trim that was programmed at the factory.
Note that trim must always be run following reset of the device.
Table 16. Oscillator Trim Register (0x1B)
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
1
–
Reserved (1)
–
0
–
Oscillator trim not done (read-only) (1)
–
1
–
Oscillator trim done (read only)
–
0
–
Reserved (1)
–
0
–
Select factory trim (Write a 0 to select factory trim; default is 1.)
–
1
–
Factory trim disabled (1)
–
0
Reserved (1)
(1)
Default values are in bold.
When a back-end error signal is received from the internal power stage, the power stage is reset stopping all
PWM activity. Subsequently, the modulator waits approximately for the time listed in Table 17 before attempting
to re-start the power stage.
Table 17. BKND_ERR Register (0x1C)(1)
D7
D6
D5
D4
D3
D2
D1
D0
FUNCTION
0
X
Reserved
–
0
1
0
Set back-end reset period to 299 ms (2)
–
0
1
Set back-end reset period to 449 ms
–
0
1
0
Set back-end reset period to 598 ms
–
0
1
0
1
Set back-end reset period to 748 ms
–
0
1
0
Set back-end reset period to 898 ms
–
0
1
Set back-end reset period to 1047 ms
–
1
0
Set back-end reset period to 1197 ms
–
1
0
1
Set back-end reset period to 1346 ms
–
1
0
1
X
Set back-end reset period to 1496 ms
–
1
X
Set back-end reset period to 1496 ms
(1)
This register can be written only with a "non-Reserved" value. Also this register can be written once after the reset.
(2)
Default values are in bold.
Copyright 2008–2009, Texas Instruments Incorporated
47
Product Folder Link(s): TAS5709 TAS5709A
相關(guān)PDF資料
PDF描述
TAS5709PHPR 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP48
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