STA321MP datasheet(25/50 Pages) STMICROELECTRONICS

25 / 50 page

STA321MP

Registers

Doc ID 022647 Rev 1

25/50

In dynamic range compression mode the limiter threshold values vary with the volume

settings, allowing a nighttime listening mode that provides a reduction in the dynamic range

regardless of the volume level.

By setting this bit to one, de-emphasis will be implemented on all channels. When this is

used it takes the place of biquad #7 in each channel and any coefficients using biquad #1

will be ignored. The DSPB (DSP bypass) bit must be set to 0 for de-emphasis to function.

Post-scale functionality can be used for power-supply error correction. For multi-channel

applications running off the same power-supply, the post-scale values can be linked to the

value of channel 1 for ease of use and in order to update the values faster.

For ease of use, all channels can use the biquad coefficients loaded into the channel 1

Coefficient RAM space by setting the BQL bit to 1. Therefore, any EQ updates only have to

be performed once.

Bit

RST

Name

Description

2RW

DEMP

De-emphasis:

0: no de-emphasis

1: de-emphasis

Bit

RST

Name

Description

PSL

Post-scale link:

0: each channel uses individual post-scale values

1: each channel uses channel 1 post-scale values

Bit

RST

Name

Description

4RW

BQL

Biquad link:

0: each channel uses coefficient values

1: each channel uses channel 1 coefficient values

Bit

RST

Name

Description

7:5

PWMS[2:0]

PWM speed selection

PWMS[1:0]

PWM output speed

000

Normal speed (384 kHz) (all channels)

001

Half-speed (192 kHz) (all channels)

010

Double-speed (768 kHz) (all channels)

011

Normal speed (channels 1-6), double-speed (channels 7-8)

100

Odd speed (341.3 kHz) (all channels)

STA321MP 数据表(PDF) 25 Page - STMicroelectronics

STA321MP 数据表(HTML) 25 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

数据表下载

链接网址

STA321MP 数据表(PDF) 25 Page - STMicroelectronics

STA321MP 数据表(HTML) 25 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

数据表 下载

链接网址

数据表下载