WM8321
TABLE OF CONTENTS
Production Data
DESCRIPTION ....................................................................................................... 1
FEATURES ............................................................................................................ 1
APPLICATIONS..................................................................................................... 1
BLOCK DIAGRAM ................................................................................................ 2
TYPICAL APPLICATIONS .................................................................................... 3
TABLE OF CONTENTS ......................................................................................... 4
1
PIN CONFIGURATION.................................................................................. 8
2
ORDERING INFORMATION ......................................................................... 8
3
PIN DESCRIPTION ....................................................................................... 9
4
THERMAL CHARACTERISTICS ................................................................ 13
5
ABSOLUTE MAXIMUM RATINGS.............................................................. 14
6
RECOMMENDED OPERATING CONDITIONS .......................................... 15
7
ELECTRICAL CHARACTERISTICS ........................................................... 16
DC-DC SYNCHRONOUS BUCK CONVERTERS ............................................... 16
LDO REGULATORS ............................................................................................ 17
RESET THRESHOLDS ....................................................................................... 22
REFERENCES .................................................................................................... 22
GENERAL PURPOSE INPUTS / OUTPUTS (GPIO)........................................... 23
DIGITAL INTERFACES ....................................................................................... 24
AUXILIARY ADC.................................................................................................. 24
SYSTEM STATUS LED DRIVERS ...................................................................... 24
8
TYPICAL POWER CONSUMPTION ........................................................... 25
9
TYPICAL PERFORMANCE DATA.............................................................. 26
9.1 DC-DC CONVERTERS ....................................................................................... 26
9.2 LDO REGULATORS ............................................................................................ 26
10
SIGNAL TIMING REQUIREMENTS ............................................................ 27
10.1 CONTROL INTERFACE ................................................................................... 27
11
DEVICE DESCRIPTION .............................................................................. 29
11.1 GENERAL DESCRIPTION ............................................................................... 29
11.2 POWER STATES ............................................................................................. 29
11.3 POWER STATE CONTROL ............................................................................. 31
11.4 POWER STATE INTERRUPTS ........................................................................ 36
11.5 POWER STATE GPIO INDICATION ................................................................ 36
11.6 ON PIN FUNCTION .......................................................................................... 37
11.7 RESET PIN FUNCTION ................................................................................... 38
12
CONTROL INTERFACE.............................................................................. 40
12.1 GENERAL DESCRIPTION ............................................................................... 40
12.2 2-WIRE (I2C) CONTROL MODE ...................................................................... 40
12.3 4-WIRE (SPI) CONTROL MODE ...................................................................... 43
12.4 REGISTER LOCKING ...................................................................................... 43
12.5 SOFTWARE RESET AND CHIP ID .................................................................. 44
12.6 SOFTWARE SCRATCH REGISTER ................................................................ 44
13
CLOCKING AND OSCILLATOR CONTROL .............................................. 45
13.1 GENERAL DESCRIPTION ............................................................................... 45
13.2 CRYSTAL OSCILLATOR INTERRUPTS ......................................................... 47
13.3 CRYSTAL OSCILLATOR CONNECTIONS ...................................................... 48
14
INSTANTCONFIG™ (ICE) AND OTP MEMORY CONTROL ...................... 49
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
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PD, February 2012, Rev 4.0
4
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
