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WM8581 データシート(PDF) 21 Page - Wolfson Microelectronics plc

部品番号 WM8581
部品情報  Multichannel CODEC with S/PDIF Transceiver
PDF  94 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8581 データシート(HTML) 21 Page - Wolfson Microelectronics plc

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WM8581
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PP Rev 1.0 March 2006
21
REGISTER READBACK
The WM8581 allows readback of certain registers in 2-wire mode. 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



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