RT5510WSC datasheet(20/52 Pages) RICHTEK

20 / 52 page

RT5510

is a registered trademark of Richtek Technology Corporation

www.richtek.com

DS5510-00

October

2019

5. SPKPROT_GAIN : The gain of safeguard for speaker protection.

When only one smart PA is connected, I2S bus is recommended. At this situation, signal sequence should be VMON,

VTEMP, VBAT, IMON and SPKPROT_GAIN. The SDI signal is only 16bit available for each channel.

The sequence is shown as below :

BCK

DATAI

LRCK

DATAO

Data =16bit

Channel L Data = 32bit

Channel R Data = 32bit

IMON

[15:0]

SPKPROT_GAIN[15:0]

VMON[15:0]

CH L

CH R

Frame Lengh = 64bit

Audio Data = 64bit

VTEMP[8:1]

VBAT[7:0]

Figure 10. Only One Smart PA I2S Left-Justified Format

When two smart PA is connected and the I2S is used, the VTEMP, VBAT and SPKPROT_GAIN signal must be

disabled. The SDI signal is only 16bit available for each channel.

The sequence is shown as below :

BCK

DATAI

LRCK

Device0

DATAO

12bit

Channel L Data = 32bit

Channel R Data = 32bit

Device0 IMON

Device0 VMON

CH L

CH R

Frame Lengh = 64bit

Audio Data = 64bit

Device1

DATAO

Device1 VMON

Device1 IMON

DATAO

Device1 VMON

Device1 IMON

Device0 IMON

Device0 VMON

12bit

Hi-Z

12bit

8bit

12bit

8bit

12bit

Figure 11. Two Smart PA I2S Standard Format

TX Data Structuring in I

2S Mode

Table 5. TX Data Structuring in I

2S Mode

2SDOLS

2SDORS

Left Channel

Right Channel

bit 0-7

bit 8-15

bit 16-23

bit 24-31

bit 0-15

bit 16-31

000

VMON[15:0]

VTEMP[8:1]

VBAT[7:0]

IMON[15:0]

SPKPROT_GAIN[15:0]

001

DAC_BIQ[23:0]

8’h0

{DC_CUT_DATA[25:0], 8’h0}

010

Hi-Z[31:0]

VMON[15:4]

IMON[15:4]

8’h00

011

VMON[15:4]

IMON[15:4]

8’h0

Hi-Z[31:0]

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