CS4350 datasheet(35/41 Pages) CIRRUS

35 / 41 page

DS691F1

CS4350

8.7.2

Freeze Controls (FREEZE) Bit 5

Function:

When set to 1, this function allows modifications to be made to the registers without the changes taking

effect until FREEZE is set back to 0. To make multiple changes in the Control Port registers take effect

simultaneously, enable the FREEZE bit, make all register changes, then disable the FREEZE bit.

When set to 0 (default), register changes take effect immediately.

8.7.3

Popguard Enable (POPG_EN) Bit 4

Function:

When set to 1, (default) the Device will initiate a ramping function as outlined in Section 4.7 on page 22.

When set to 0, the outputs will step to VQ upon release of PDN.

8.7.4

RMCK control (RMCK_CTRL[1:0]) Bits 3:2

Default = 00

Function: These bits set the function of the RMCK pin with respect to the LRCK.

8.7.5

RMCK Ratio Select (R_SELECT[1:0]) Bits 2:1

Default = 00

Function: To select the RMCK-to-LRCK ratio.

Note:

RMCK_CTRL must be set to 10 to enable this function. Please note the maximum RMCK output

frequency as specified in the ”Switching Specifications - Serial Audio Interface” on page 13.

RMCK_CTRL1 RMCK_CTRL0

Mode

256x LRCK for 48 kHz and 96 kHz, 128x @ 192kHz

512x @ 48kHz, 256x @ 96 kHz, 128x @ 192kHz

Manual control (see RMCK Ratio Select)

RMCK pin driven low

R_SELECT1

R_SELECT0

RMCK/LRCK Ratio

512

256

128

CS4350 датащи(PDF) 35 Page - Cirrus Logic