WM9090ECSSLASHR datasheet(33/81 Pages) WOLFSON

Il numero della parte	WM9090ECS/R

Spiegazioni elettronici	Ultra Low Power Audio Subsystem

PDF	81 Pages

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Produttore elettronici	WOLFSON [Wolfson Microelectronics plc]

Homepage	http://www.wolfsonmicro.com

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Production Data

WM9090

PD, November 2010, Rev 4.1

OSC_ENA

CLK_SYS

f/N

DC Servo clock

f/N

Class D switching clock

f/N

256kHz clock to

Charge Pump, Control

Write Sequencer and

other circuits

f.N

TOCLK_ENA

Volume update timeout

f/N

f/1024

TOCLK_RATE_X4

0 = f x 1

1 = f x 4

TOCLK_RATE

0 = f / 2

1 = f / 1

Internal

Oscillator

f/N

TOCLK_RATE_DIV16

0 = f / 1

1 = f / 16

Figure 6 Clocking Scheme

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R1 (01h)

Power

Management

(1)

OSC_ENA

CLK_SYS Oscillator Enable

0 = Disabled

1 = Enabled

R6 (06h)

Clocking 1

TOCLK_RATE

TOCLK Rate Divider (/2)

0 = f / 2

1 = f / 1

TOCLK_ENA

TOCLK Enable

0 = Disabled

1 = Enabled

R66 (42h)

Clocking 4

TOCLK_RATE_DIV16

TOCLK Rate Divider (/16)

0 = f / 1

1 = f / 16

TOCLK_RATE_X4

TOCLK Rate Multiplier

0 = f x 1

1 = f x 4

Table 16 Clocking Control

TOCLK_RATE

TOCLK_RATE_X4 TOCLK_RATE_DIV16

TOCLK

FREQ (Hz)

PERIOD (ms)

1000

500

250

125

62.5

31.25

15.625

7.8125

128

Table 17 TOCLK Rates

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