WL测试

1. 接收机

MCLK : 16MHz
SCLK : 2MHz
LRCK : 41.67kHz

fLRCK = fSCLK / 48 = 2000(k) / 48 = 41.67 (kHz)
fSCLK = fMCLK / 8 = 16(MHz) / 8 = 2(MHz)

实际配置：

fLRCK = fMCLK / 384
fSCLK = fLRCK x 48

音频采样时间间隔：

Ts = 1/fLRCK = 384/16 = 24(us)

16采样点时长：

T16 = Ts x 16 = 384(us)

32采样点时长：

T32 = Ts x 32 = 768(us)

No	Pin	I/O	Set	Effect	Function
12	PS	I	L	I2C Bus control mode	(I2C pin =“H”)Control Mode Select Pin “L”: I2c Bus serial control mode “H”: Parallel control mode
13	I2C	I	H	I2C Bus control mode	Control Mode Select Pin “L”: 3-wire serial control mode “H”: I2C Bus Serail control mode or Parallel control mode
11	CAD0_I2C	I	L	Chip Address 0 Pin in I2C Bus serial control mode
8	CAD1	I	L	Chip Address 0 Pin in I2C Bus
9	SDA	I/O		I2C Data
10	SCL	I		I2C Clock
6	TDMO1	O	NC
7	DZF	O	NC
1	MCLK	I	16MHz¹(384fs)		Master Clock Input Pin
2	BICK	I	2MHz¹(48fs)		Audio Serial Data Clock Pin
3	LRCK	I	fs=41.67k¹		Input Channel Clock Pin
4	SDTI1	I

28	LDOE	I	H	Enable Internal LDO
32	PDN	I	From MCU(pull down)		Power-Down & Reset Pin When “L”, Powerd-down and the control registers are reset to default state
FSEL	I	H	Digital Filter: Short Delay Sharp Roll-Off	Digital Filter select Pin “L”: Sharp Roll-Off, “H”: Short Delay Sharp Roll-Off
DIF/TDMI	I	H	Mode 1: I2S Slave MCLK=256/384fs LRCK=L/H BICK >= 48fs Referent to: page 16	Audio Data Format Select Pin “L”: MSB justified, “H”: I2S
CKS	I	GND

¹ : 实测数值

测量值

MCLK : 16MHz
SCLK : 2MHz
LRCK : 41.67kHz

fLRCK = fSCLK / 48 = 2000(k) / 48 = 41.67 (kHz)
fSCLK = fMCLK / 8 = 16 (MHz)

配置：

fLRCK = fMCLK / 384
fSCLK = fLRCK x 48
-> fMCLK = fSCLK x 8 = fLRCK x 48 x 8

音频采样时间间隔：

tLRCK = 1/fLRCK = 384/16 = 24(us)

16采样点时长：

T16 = Ts x 16 = 384(us)

32采样点时长：

T32 = Ts x 32 = 768(us)

Pin	I/O	Set	Effect	Function
GSEL	I	L	0dB	Input Gain Select Pin “L”: 0dB, “H”: +15dB
LRCK	I	fs=41.67k¹		Channel Clock Pin
MCLK	I	16MHz¹(384fs)		Master Clock Input Pin
BICK	I	2MHz¹(48fs)		Audio Serial Data Clock Pin
PDN	I	From MCU		Reset & Power Down Pin “L”: Reset & Power down, “H” : Normal operation
FSEL	I	H	Digital Filter: Short Delay Sharp Roll-Off	Digital Filter select Pin “L”: Sharp Roll-Off, “H”: Short Delay Sharp Roll-Off
DIF/TDMI	I	H	Mode 1: I2S Slave MCLK=256/384fs LRCK=L/H BICK >= 48fs Referent to: page 16	Audio Data Format Select Pin “L”: MSB justified, “H”: I2S
CKS	I	GND		Mode Select Pin

¹ : 实测数值