WM8510GEDSSLASHV datasheet(44/81 Pages) WOLFSON

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WM8510

Production Data

PD Rev 4.1 December 2006

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R49

VROI

VREF (AVDD/2 or 1.5xAVDD/2) to

analogue output resistance

0: approx 1k

Ω

1: approx 30 k

Ω

Table 37 Disabled Outputs to VREF Resistance

A dedicated buffer is available for tying off unused analogue I/O pins as shown in Figure 21. This

buffer can be enabled using the BUFIOEN register bit.

If the SPKBOOST or MONOBOOST bits are set then the relevant outputs will be tied to the output of

the DC level shift buffer at 1.5xAVDD/2 when disabled.

Table 38 summarises the tie-off options for the speaker and mono output pins.

Figure 21 Unused Input/Output Pin Tie-off Buffers

MONOEN/

SPKN/PEN

MONOBOOST/

SPKBOOST

VROI

OUTPUT CONFIGURATION

1kΩ tieoff to AVDD/2

30kΩ tieoff to AVDD/2

1kΩ tieoff to 1.5xAVDD/2

30kΩ tieoff to 1.5xAVDD/2

Output enabled (DC level=AVDD/2)

Output enabled (DC level=1.5xAVDD/2)

Table 38 Unused Output Pin Tie-off Options

WM8510GEDS/V 数据表(PDF) 44 Page - Wolfson Microelectronics plc

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