WM8993 datasheet(159/229 Pages) WOLFSON

Part #	WM8993

Description	Audio Hub CODEC for Multimedia Phones

PDF	229 Pages

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Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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159 / 229 page

Production Data

WM8993

PD, November 2010, Rev 4.0

159

reached their respective power on thresholds, POR

¯¯¯ is released high, all registers are in their default

state, and writes to the control interface may take place.

Note that a minimum power-on reset period, TPOR, applies even if AVDD1, AVDD2 and DCVDD have

zero rise time. (This specification is guaranteed by design rather than test.)

On power down, POR

¯¯¯ is asserted low when any of AVDD1, AVDD2 or DCVDD falls below their

respective power-down thresholds.

Typical Power-On Reset parameters for the WM8993 are defined in Table 109.

SYMBOL

DESCRIPTION

MIN

TYP

MAX

UNIT

Vpora_on

Power-On threshold (AVDD1 or AVDD2)

1.52

Vpora_off

Power-Off threshold (AVDD1 or AVDD2)

1.5

Vpord_on

Power-On threshold (DCVDD)

0.92

Vpord_off

Power-Off threshold (DCVDD)

0.9

TPOR

Minimum Power-On Reset period

100

Table 109 Typical Power-On Reset parameters

WM8993 Datasheet(PDF) 159 Page - Wolfson Microelectronics plc