WM8734-EV1B データシートの表示（PDF） - Wolfson Microelectronics plc

部品番号

コンポーネント説明

メーカー

WM8734-EV1B

WM8734 Evaluation Board User Handbook

Wolfson Microelectronics plc 

WM8734-EV1M

BOARD INPUT

The input interface to this board is via two analogue signal input phono connectors J11 (LLINEIN) and

J13 (RLINEIN). These signals are AC coupled before being input to the device. To allow a 2Vrms

input signal to be input to the evaluation board without causing damage to the WM8734, a simple

resistor divider puts a 7dB attenuation on the input signal ensuring that a signal no greater than

1Vrms reaches the WM8734.

When used in Slave Mode digital clock signals must be applied to the WM8734. A digital (AES/EBU,

UEC958, S/PDIF, EIAJ CP340/1201) signal input must be applied to the coaxial input (J12), or the

optical input (U1), allowing the CS8427 (U5) to generate the necessary clocks.

A direct digital input is also available via one side of a 2x8 pin header (H1); data must be input in one

of the WM8734 supported formats - see datasheet.

BOARD OUTPUT

The output interface from the board is via an optical (U6) or coaxial (J22) digital (AES/EBU, UEC958,

S/PDIF, EIAJ CP340/1201) signal output. A direct signal output is available via one side of a 2x6 pin

header (H2). Data is output in one of the WM8734 supported formats - see datasheet.

There are two analogue signal output phono connectors J23 (LOUT) and J19 (ROUT). These signals

are AC coupled (optional, may be bypassed via links J18 and J21) before being output from the

board. There is also an SMB connector J20 (DACLRC_OUT). This may be used to connect to some

external circuit. DACLRC is only an output when the WM8734 is in Master Mode.

Warning: If AC coupling capacitors are bypassed, the outputs will be on a DC level (AVDD/2).

This can damage Hi-Fi equipment if directly connected.

w

Rev 1.2 November 2002

3

Share Link: