WM8281 datasheet(39/392 Pages) CIRRUS

Part #	WM8281

Description	Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation

PDF	392 Pages

Scroll/Zoom	100%

Manufacturer	CIRRUS [Cirrus Logic]

Direct Link	http://www.cirrus.com

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39 / 392 page

WM8281

Rev 4.0

4-WIRE (SPI) CONTROL MODE

(input)

SCLK

(input)

MOSI

(input)

tSSU

tSCH

tSCL

tSCY

tDHO

tDSU

tSHO

Figure 9 Control Interface Timing - 4-wire (SPI) Control Mode (Write Cycle)

SCLK

(input)

MISO

(output)

tDL

(input)

Figure 10 Control Interface Timing - 4-wire (SPI) Control Mode (Read Cycle)

Test Conditions

The following timing information is valid across the full range of recommended operating conditions, unless otherwise noted.

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

¯¯ falling edge to SCLK rising edge

tSSU

2.6

SCLK falling edge to SS

¯¯ rising edge

tSHO

SCLK pulse cycle time

SYSCLK disabled

(SYSCLK_ENA=0)

tSCY

38.4

SYSCLK_ENA=1 and

SYSCLK_FREQ = 000

76.8

SYSCLK_ENA=1 and

SYSCLK_FREQ > 000

38.4

SCLK pulse width low

tSCL

15.3

SCLK pulse width high

tSCH

15.3

MOSI to SCLK set-up time

tDSU

1.5

MOSI to SCLK hold time

tDHO

1.7

SCLK falling edge to

MISO transition

SCLK slew (90% to 10%) = 5ns,

CLOAD (MISO) = 25pF

tDL

11.9

WM8281 Datasheet(PDF) 39 Page - Cirrus Logic

WM8281 Datasheet(HTML) 39 Page - Cirrus Logic

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