WM8321 datasheet(41/253 Pages) WOLFSON

Nome de Peças	WM8321

Descrição Electrónicos	Processor Power Management Subsystem

PDF	253 Pages

Scroll/Zoom	100%

Fabricante Electrônico	WOLFSON [Wolfson Microelectronics plc]

Página de início	http://www.wolfsonmicro.com

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41 / 253 page

Production Data

WM8321

PD, February 2012, Rev 4.0

The sequence of signals associated with a single register write operation is illustrated in Figure 7.

Figure 7 Control Interface 2-wire (I2C) Register Write

The sequence of signals associated with a single register read operation is illustrated in Figure 8.

Figure 8 Control Interface 2-wire (I2C) Register Read

The Control Interface also supports other register operations, as listed above. The interface protocol

for these operations is summarised below. The terminology used in the following figures is detailed in

Table 11.

Note that, for multiple write and multiple read operations, the auto-increment option must be enabled.

This feature is enabled by default; it is described in Table 12 below.

TERMINOLOGY

DESCRIPTION

Start Condition

Repeated start

Acknowledge (SDA Low)

¯¯

Not Acknowledge (SDA High)

Stop Condition

R/W

¯¯

ReadNotWrite

0 = Write

1 = Read

[White field]

Data flow from bus master to WM8321

[Grey field]

Data flow from WM8321 to bus master

Table 11 Control Interface Terminology

Figure 9 Single Register Write to Specified Address

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