AS3525 datasheet(151/194 Pages) AMSCO

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AS3525-A/-B C22O22

Data Sheet, Confidential

www.austriamicrosystems.com

Revision 1.13

151

- 194

7.4.14

Auxiliary Oscillator

7.4.14.1 General

This block is a low power oscillator, which can provide a clock to the digital core. CLK_OUT pad of the AFE is connected to clk_int pad of the digital

die.

7.4.14.2 Register Description

Table 138 CLOCK_OUT Register

Name

Base

Default

CLOCK_OUT

I2C audio master

0x00

Clock Output Register

Offset: 0x1D

This register is reset at a DVDD-POR.

Bit

Bit Name

Default

Access

Bit Description

7..5

000

n/a

4:3

CLKOUT_mode<1:0>

R/W

CLKOUT pin frequency divider

00: oscillator frequency direct mode

01: osc freq. divide by 2

10: osc freq. divide by 4

11: OFF

2:1

CLKOUT_drive<1:0>

R/W

CLKOUT pin driver strength adjustment

00: 4mA PushPull

01: 2mA PushPull

10: 1mA PushPull

11: 0.5mA PushPull

OSC_pd

R/W

0: 24MHz oscillator enabled

1: 24MHz oscillator in power down

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