wm8326 Wolfson Microelectronics plc, wm8326 Datasheet - Page 12

• Manufacturer Part Number: wm8326
• Description: Processor Power Management Subsystem
• Manufacturer: Wolfson Microelectronics plc

WM8326
.
Figure 1 BuckWise™ Load Transient Response
Note: C
NON VOLATILE MEMORY SYSTEM CONFIGURATION
w
V
V
I
V
V
I
I
OUT
OUT
OUT
IN
OUT
IN
IN
out
= 3.8V
= 10mA to 1.2A
= 1.2V
=22μF, L
= 3.8V
= 3.8V
= 0.01A to 1.2A
out
=0.5μH, Load rise time =200ns
The WM8326 is a highly configurable device which can be tailored specifically to the requirements of
a complex system application. The sequencing and voltage control of the integrated DC-DC
Converters and LDO Regulators in the ON, OFF, and SLEEP power state conditions can be
programmed in 5 startup and shutdown timeslots. Together with a flexible GPIO and interrupt model,
this allows the WM8326 to be a customized solution for each application. The WM8326 reads
system configuration information from the internal OTP memory and also from an external EEPROM,
if connected.
In the development phase, the WM8326 permits designers to modify or experiment with different
settings of the control sequences by writing to the applicable registers in the OFF state prior to
commanding an ‘ON’ state transition. Configuration settings can also be stored on an external
EEPROM and loaded onto the WM8326 as required. In this case, the external EEPROM data takes
precedence over any data programmed into the internal non volatile memory.
•
•
•
•
Customisable standard product using the OTP integrated non-volatile memory (NVM) to store
system startup sequence and regulator voltage defaults
InstantConfig
PCB production line or in-factory configuration flows for OTP are supported
All main application processor start-up requirements are accommodated with 5
startup/shutdown timeslots and flexible GPIO and Interrupt model
TM
EEPROM (ICE) development mode to facilitate rapid system prototyping
Product Brief, October 2010, Rev 1.0
V
OUT P-P
= +/-33mV
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