wm8352 Wolfson Microelectronics plc, wm8352 Datasheet - Page 107

• Manufacturer Part Number: wm8352
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

Production Data
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Figure 64 WM8352 Operating State Diagram
14.2.1
The WM8352 moves from the ACTIVE to the HIBERNATE state when the HIBERNATE register bit is
set. It can also move to hibernate using the Hibernate Edge or the Hibernate Level function from the
GPIOs.
It returns to the ACTIVE state when the Hibernate Level GPIO function is reset and the HIBERNATE
bit is set to 0. It can also return to ACTIVE via the Hibernate Edge function or when a wake-up event
(see Section 14.3.1) occurs.
If a fault condition occurs in the HIBERNATE state, the WM8352 moves to the OFF state.
Table 54 Invoking HIBERNATE State
The behaviour of the WM8352 in the HIBERNATE state is programmable in terms of supply voltage
generation, interrupts and resets. Fast battery charging is disabled in the HIBERNATE state, but
trickle charging is possible.
R5 (05h)
System
Hibernate
ADDRESS
HIBERNATE STATE SELECTION
BIT
15
HIBERNATE
LABEL
DEFAULT
0
Determines what state the chip should
operate in.
0 = Active state
1 = Hibernate state
The register bit defaults to 0 when a reset
happens
DESCRIPTION
PD, June 2009, Rev 4.1
WM8352
107