WM8310GEB/V Wolfson Microelectronics, WM8310GEB/V Datasheet - Page 152

• Manufacturer Part Number: WM8310GEB/V
• Description: POWER MANAGEMENT SUBSYSTEM, 169BGA
• Manufacturer: Wolfson Microelectronics

Specifications of WM8310GEB/V

• Supply Voltage: 7V
• No. Of Step-down Dc - Dc Converters: 4
• No. Of Ldo Regulators: 11
• Digital Ic Case Style: BGA
• No. Of Pins: 169
• No. Of Regulated Outputs: 13
• Operating Temperature Range: -40°C To
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

WM8310
System Reset
Device Reset
Software Reset
Power On Reset
Table 100 Resets Summary
w
RESET TYPE
Power Sequence Failure
Device overtemperature
SYSVDD undervoltage
(1)
SYSVDD undervoltage
(2)
Software OFF request
VPMIC (LDO12)
undervoltage
Watchdog timeout
Hardware Reset
Converter (LDO or DC-
DC) Undervoltage
Software Reset
Power On Reset
RESET CONDITION
A summary of the WM8310 Resets is contained in Table 100.
In the cases where Automatic Recovery is supported (as noted in Table 100), the WM8310 will re-
start the WM8310 following the Reset, and return the device to the ON state. The particular Reset
condition which caused the return to the ON state will be indicated in the “ON Source” register - see
Section 11.3.
Note that, if a Watchdog timeout or Converter undervoltage fault persists, causing recurring Device
Resets, then a maximum of 7 attempts will be made to initiate the start-up sequence. After 7
attempts, the WM8310 will remain in the OFF state until the next valid ON state transition event
occurs.
DC Converters, LDOs or CLKOUT
circuits (including FLL) have failed
to start up within the permitted time.
See Section 11.3.
An overtemperature condition has
been detected. See Section 26.
SYSVDD is less than the user-
selectable threshold SYSLO_THR
and SYSLO_ERR_ACT is
configured to select OFF in this
condition. See Section 24.4.
SYSVDD is less than the
SHUTDOWN voltage.
See Section 24.4.
OFF has been commanded by
writing CHIP_ON = 0.
See Section 11.3
The WM8310 supply voltage is less
than the System Reset threshold.
See Section 24.4.
Watchdog timer has expired and
the selected response is to
generate a Device Reset.
See Section 25.
The RESET
low by an external source.
See Section 24.2.
An undervoltage condition has been
detected and the selected response
is “Shut down system (Device
Reset)” See Section 15.
Software Reset has been
commanded by writing to Register
0000h. See Section 12.5.
The WM8310 supply voltage is less
than the Power-On Reset (POR)
threshold. See Section 24.4.
¯ ¯ ¯ ¯ ¯ ¯ pin has been pulled
DESCRIPTION
Assert RESET
Select OFF state.
If the Reset Condition is
VPMIC (LDO12)
undervoltage, then the
WM8310 enters the
BACKUP state.
Assert RESET
Shutdown and restart
the WM8310.
Reset Register map
(Note the RTC and
software scratch
registers are not reset.)
Assert RESET
Shutdown and restart
the WM8310.
See Section 24.3 for
configurable options
regarding the Register
Map contents.
The WM8310 is in the
NO POWER state.
All register contents are
lost.
RESPONSE
¯ ¯ ¯ ¯ ¯ ¯ pin.
¯ ¯ ¯ ¯ ¯ ¯ pin.
¯ ¯ ¯ ¯ ¯ ¯ pin.
PP, December 2009, Rev 3.0
Pre-Production
No
No
No
No
No
No
Yes
Yes
Yes
Yes
No
AUTOMATIC
RECOVERY
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