Cirrus Logic CS53L30 - Manual (Page 49)

DS992F1 49
CS53L30
7.8 Mic Bias Control
7.8 Mic Bias Control Address 0x0A
R/W
7 6 5 4 3 2 1 0
MIC4_BIAS_PDN MIC3_BIAS_PDN MIC2_BIAS_PDN MIC1_BIAS_PDN — VP_MIN MIC_BIAS_CTRL[1:0]
Default 1 1 1 1 0 1 0 0
Bits Name Description
7, 6,
5, 4
MICx_
BIAS_
PDN
Mic x bias power down
0 Mic x bias driver is powered up and its drive value is set by MIC_BIAS_CTRL.
1 (Default) Mic x bias driver is powered down and the driver is Hi-Z.
3 — Reserved
2 VP_MIN VP supply minimum voltage setting. Configures the internal circuitry to accept the VP supply with the specified minimum value.
These settings also affect PSRR; see Table 3-7 .
0 3.0 V. Optimizes VP PSRR performance if the minimum VP supply is expected to fall below 3.2 V.
1 (Default) 3.2 V. Optimizes VP PSRR if VP is at least 3.2 V.
1:0 MIC_
BIAS_
CTRL
MICx bias output voltage control. Sets nominal MICx_BIAS output voltage. Table 3-6 lists actual voltages. To avoid long
ramp-up times between 1.8- and 2.7-V settings, change to the Hi-Z setting before the final setting.
00 (Default) Hi-Z
01 1.80 V 10 2.75 V
11 Reserved
7.9 ASP Configuration Control Address 0x0C
R/W 7 6 5 4 3 2 1 0
ASP_M/S ASP_SCLK_INV ASP_RATE[3:0]
Default 0 0 0 0 1 1 0 0
Bits Name Description
7 ASP_M/S ASP Master/Slave Mode. Configures the clock source (direction) for both ASPs.
0 (Default) Slave (input)
1 Master (output). When enabling Master Mode, ASP_RATE must be set to a valid setting defined in
Section 4.6.5 .
6:5 — Reserved
4 ASP_
SCLK_INV
ASP_SCLK polarity. Configures the polarity of the ASP_SCLK signal.
0 (Default) Not inverted
1 Inverted
3:0 ASP_RATE ASP clock control dividers. Together with the INTERNAL_FS_RATIO bit, provides divide ratios for ASP clock timings.
Section 4.6.5 lists settings.
1100 (Default) 48 kHz
7.10 ASP Control 1 Address 0x0D
R/W
7 6 5 4 3 2 1 0
ASP_TDM_PDN ASP_SDOUT1_PDN ASP_3ST SHIFT_LEFT — ASP_SDOUT1_DRIVE
Default 1 0 0 0 0 0 0 0
Bits Name Description
7 ASP_
TDM_
PDN
ASP TDM Mode power down. Configures the power state of TDM Mode.
0 TDM Mode
1 (Default) I
2 S Mode
6 ASP_
SDOUT1_
PDN
ASP_SDOUT1 output path power down. Configures the ASP_SDOUT1 path power state for I 2 S Mode (ASP_TDM_PDN = 1).
0 (Default) Powered up
1 Powered down, ASP_SDOUT1 is Hi-Z. Setting this bit does not tristate the serial port clock. If ASP_TDM_PDN is
cleared, setting this bit does not affect ASP_SDOUT1.
5 ASP_3ST ASP output path tristate. Determines the state of the ASP drivers.
Slave Mode (ASP_M/S = 0)
0 (Default) Serial port clocks are inputs and ASP_SDOUTx is output
1 Serial port clocks are inputs and ASP_SDOUTx is Hi-Z Master Mode (ASP_M/S = 1)
Serial port clocks and ASP_SDOUTx are outputs
Serial port clocks and ASP_SDOUTx are Hi-Z
4 SHIFT_
LEFT
TDM first bit of frame shift 1/2 SCLK left. Configures the start offset of data after rising edge of FSYNC.
0 (Default) No Shift. Data output on second rising edge of SCLK after rising edge of FSYNC (see Table 3-12 ).
1 1/2 SCLK shift left. Data output 1/2 SCLK cycle earlier (see Table 3-12 ).
3:1 — Reserved
0 ASP_
SDOUT1_
DRIVE
ASP_SDOUT1 output drive strength. Table 3-14 describes drive-strength specifications.
0 (Default) Normal
1 Decreased