WM8945ECSSLASHR datasheet(104/169 Pages) WOLFSON

Part #	WM8945ECS/R

Description	Mono Low-Power CODEC with Video Buffer and Touch Panel Controller

PDF	169 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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104 / 169 page

WM8945

Production Data

PD, May 2011, Rev 4.1

104

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R17 (11h)

Status Flags

TEMP_STS

Thermal Sensor status

0 = Normal

1 = Overtemperature

R42 (2Ah)

Output ctrl

THERR_ACT

Thermal Shutdown enable

0 = Disabled

1 = Enabled

When THERR_ACT = 1, then an

overtemperature condition will

cause the speaker outputs to be

disabled.

Table 69 Thermal Shutdown Control

POWER ON RESET

The WM8945 includes a Power-On Reset (POR) circuit, which is used to reset the digital logic into a

default state after power up. The POR circuit derives its output from LDOVDD and DCVDD. The

internal POR

¯¯¯ signal is asserted low when either LDOVDD or DCVDD are below minimum thresholds.

The specific behaviour of the circuit will vary, depending on relative timing of the supply voltages.

Typical scenarios are illustrated in Figure 48 and Figure 49.

Figure 48 Power On Reset Timing – LDOVDD enabled first

WM8945ECS/R Datasheet(PDF) 104 Page - Wolfson Microelectronics plc