WM8580 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8580

Multichannel CODEC with S/PDIF Transceiver

Wolfson Microelectronics plc 

Production Data

WM8580

REGISTER READBACK

The WM8580 allows readback of certain registers in 2-wire mode, with data output on the SDO pin.

As in 3-wire mode, there are two methods of reading back data: continuous and non-continuous

readback. Continuous readback is set by writing to the Readback Control register (see Table 9) to

set READEN and CONTREAD to 1, and to set the READMUX bits to select the register to be read

back. The status of this register can then be readback using the protocol shown in Figure 10.

Figure 10 2-Wire Continuous Readback

If CONTREAD is set to zero, the user can read back directly from the register by writing to the

register address, to which the device will respond with data. The protocol for this system is shown in

Figure 11.

Figure 11 2-Wire Non-Continuous Readback

SOFTWARE REGISTER RESET

Writing to register R53 will cause a register reset, resetting all register bits to their default values.

REGISTER

BIT

ADDRESS

R53

8:0

RESET

35h

Table 11 Software Reset

LABEL

RESET

DEFAULT

DESCRIPTION

n/a

Writing any data value to this register

will apply a reset to the device

registers.

w

PD Rev 4.3 August 2007

21

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