TAS2505: To put the device TAS2505 in standby mode

DAVID CUI

Part Number: TAS2505

To put the device TAS2505 in standby mode，Which registers are required? What are the parameters?How to operate from Standby mode to work mode?

over 8 years ago

0 Ivan Salazar over 8 years ago

TI__Guru** 109245 points

Hi David,

The standby mode refers to the state when most of the internal blocks are powered down while the device is still powered.
DAC can be powered down through page 0 register 0x3F bit 7. Speaker Amplifier can be powered down through page 1 register 0x2D bit 1. PLL can be powered down through page 0 register 0x05 bit 7. Level shifters can be controlled through page 1 register 0x02.

Best regards,
-Ivan Salazar
Texas Instruments

0 DAVID CUI over 8 years ago in reply to Ivan Salazar

Intellectual 610 points

dear Ivan:

Enter standby mode register configuration：

static const unsigned char TxData1[] ={ // Px, P1 Switch to Page 1

0x00, 0x01,

// LDO Control Register // P1, R2, b5-4. AVDD LDO Output = 1.8V // P1, R2, b3. PLL and HP Level Shifters = Power down

0x02,0x08,

// Px, P0 Switch to Page 0

0x00, 0x00,

// Clock Setting Register 2 - PLL P and R Values

// P0, R5, b7. PLL = Power down (0)

// P0, R5, b6-4. PLL Divider P = 1

// P0, R5, b3-0. PLL Divider R = 1

0x05, 0x14,

// Clock Setting Register 11 - NDAC Values

// P0, R11, b7. NDAC = Power down

// P0, R11, b6-0. NDAC = 3 (DAC_CLK = CODEC_CLKIN / NDAC)

0x0B, 0x03,

// Clock Setting Register 12 - MDAC Values

// P0, R12, b7. MDAC = Power down

// P0, R12, b6-0. MDAC = 8 (DAC_MOD_CLK = DAC_CLK / MDAC)

0x0C, 0x08,

// Px, P1 Switch to Page 1

0x00, 0x01,

// REF, POR and LDO BGAP Control Register

// P1, R1, b4. Master Reference = Power down

// P1, R1, b3. POR Power Control = Power down // P1, R1, b1. LDO Bandgap = Power down

0x01, 0x08,

// Speaker Amplifier Control 1

// P1, R45, b1. Spk Driver = Power Up/Reset 0x2D, 0x00,

// Px, P0 Switch to Page 0 0x00, 0x00,

// DAC Channel Setup Register 1

// P0, R63, b7. DAC Power = Power Up

// P0, R63, b5-4. DAC Path = Mix of L+R

// P0, R63, b1-0. Soft-Step Control = 1 step/WCLK

0x3F, 0x34, };

Current test value is 1.7mA,By modifying the register configuration, I can enter the operating mode from the standby mode，

stanyby wake up:

static const unsigned char TxData2[] ={ // Px, P1 Switch to Page 1 0x00, 0x01, // LDO Control Register // P1, R2, b5-4. AVDD LDO Output = 1.8V // P1, R2, b3. PLL and HP Level Shifters = Power Up 0x02, 0x04, // Px, P0 Switch to Page 0 0x00, 0x00, // Clock Setting Register 2 - PLL P and R Values // P0, R5, b7. PLL = Power Up (1) // P0, R5, b6-4. PLL Divider P = 1 // P0, R5, b3-0. PLL Divider R = 1 0x05, 0x94, // Clock Setting Register 11 - NDAC Values // P0, R11, b7. NDAC = Power Up // P0, R11, b6-0. NDAC = 3 (DAC_CLK = CODEC_CLKIN / NDAC) 0x0B, 0x83, // Clock Setting Register 12 - MDAC Values // P0, R12, b7. MDAC = Power Up // P0, R12, b6-0. MDAC = 8 (DAC_MOD_CLK = DAC_CLK / MDAC) 0x0C, 0x88, // Px, P1 Switch to Page 1 0x00, 0x01, // REF, POR and LDO BGAP Control Register // P1, R1, b4. Master Reference = Power Up // P1, R1, b3. POR Power Control = Power Up // P1, R1, b1. LDO Bandgap = Power Up 0x01, 0x10, // Speaker Amplifier Control 1 // P1, R45, b1. Spk Driver = Power Up/Reset 0x2D, 0x02, // Px, P0 Switch to Page 0 0x00, 0x00, // DAC Channel Setup Register 1 // P0, R63, b7. DAC Power = Power Up // P0, R63, b5-4. DAC Path = Mix of L+R // P0, R63, b1-0. Soft-Step Control = 1 step/WCLK 0x3F, 0xB4, };

If there is no operation, Wait 5 minutes later，Current test value is 100uA,but Need to initialize all registers before entering the operating mode,

My question is：

1、Why does it appear The phenomenon described above

2、How long to enter standby mode current can reach 100uA.

3、Why do you need to initialize all registers to get to work mode

Best regards,

Audio

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TAS2505: To put the device TAS2505 in standby mode