STA350B datasheet(80/94 Pages) STMICROELECTRONICS

80 / 94 page

STA350B, STA350BW

80/94

DocID018572 Rev 7

When SVUPE = 1 the fade-in rate is defined by the SVUP[4:0] bits according to the

following formula:

Fade-in rate = 48 / (N + 1) dB/ms

where N is the SVUP[4:0] value.

When SVDWE = 1 the fade-out rate is defined by the SVDW[4:0] bits according to the

following formula:

Fade-in rate = 48 / (N + 1) dB/ms

where N is the SVDW[4:0] value.

Note:

For fade-out rates greater than 6 dB/msec it is suggested to disable the CPWMEN bit

(Section 8.24.4 ) and ZCE bit (Section 8.5.7) in order to avoid any audible pop noise.

8.20

DRC RMS filter coefficients (addr 0x39-0x3E)

SVUPE

Mode

When volume is increased, use the default rate

When volume is increased, use the rates defined by SVUP[4:0]

SVDWE

Mode

When volume is decreased, use the default rate

When volume is decreased, use the rates defined by SVDW[4:0]

R_C0[23]

R_C0[22]

R_C0[21]

R_C0[20]

R_C0[19]

R_C0[18]

R_C0[17]

R_C0[16]

0000

0001

R_C0[15]

R_C0[14]

R_C0[13]

R_C0[12]

R_C0[11]

R_C0[10]

R_C0[9]

R_C0[8]

1110

R_C0[7]

R_C0[6]

R_C0[5]

R_C0[4]

R_C0[3]

R_C0[2]

R_C0[1]

R_C0[0]

1111

R_C1[23]

R_C1[22]

R_C1[21]

R_C1[20]

R_C1[19]

R_C1[18]

R_C1[17]

R_C1[16]

0111

1110

R_C1[15]

R_C1[14]

R_C1[13]

R_C1[12]

R_C1[11]

R_C1[10]

R_C1[9]

R_C1[8]

1100

0000

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