WM8533 datasheet(17/41 Pages) WOLFSON

Part #	WM8533

Description	24-bit 192kHz Stereo DAC with 2Vrms Ground Referenced Line Output

PDF	41 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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17 / 41 page

Production Data

WM8533

PD, July 2012, Rev 4.0

Figure 10 Single Register Write to Specified Address

Figure 11 Single Register Read from Specified Address

SPI CONTROL MODE

The WM8533 can also be controlled by writing to registers through a SPI control interface. A control

word consists of 24 bits. The first bit is the read/write bit (R/W

¯¯) which must always be 0, which is

followed by 7 address bits (A6 to A0) that determine which control register is accessed. The

remaining 16 bits (B15 to B0) are data bits, corresponding to the 16 bits in each control register.

Volume update registers R06h and R07h are unavailable in SPI control mode. To use volume update

in software control mode, I

2C mode must be used.

In SPI mode, every rising edge of SCLK clocks in one data bit from the SDA pin. A rising edge on

¯¯ latches in a complete control word consisting of the last 24 bits.

The SPI mode write operation protocol is illustrated in Figure 12.

Figure 12 SPI Control Interface – Write operation

In Write operations (R/W

¯¯=0), all SDA bits are driven by the controlling device.

WM8533 Datasheet(PDF) 17 Page - Wolfson Microelectronics plc