WM8310GEB/V Wolfson Microelectronics, WM8310GEB/V Datasheet - Page 137

• 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

Pre-Production
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22.2.2
Setting LEDn_SRC = 01 configures the associated LED to indicate Power State status. Under this
selection, four different conditions may be indicated, as defined in Table 82.
Table 82 Status LED Outputs - Power State Status
If more than one of the conditions listed occurs simultaneously, then the LED output pattern is
controlled by the condition in the highest position within the list above.
For example, if the SYSVDD Low condition occurs while in the ON or SLEEP states, then the LED
output follows the pattern defined for the SYSVDD Low condition.
The SYSVDD Low indication is asserted if SYSVDD is less than the user-selectable threshold
SYSLO_THR, as described in Section 24.4.
Note that, in the case of Power Sequence Failure, the transition to OFF occurs after the 4 LED
pulses have been emitted.
22.2.3
Setting LEDn_SRC = 10 configures the associated LED to indicate Battery Charger status. Under
this selection, two different conditions may be indicated, as defined in Table 83.
Table 83 Status LED Outputs - Charger Status
22.2.4
Setting LEDn_SRC = 11 configures the associated LED to operate in Manual Mode, which is further
configurable using additional register fields.
In Manual Mode, the LED output can be commanded as Off, On (Constant), Continuous Pulsed or
Pulsed Sequence. The selected operation is determined by the LEDn_MODE registers as described
in Table 84.
In Continuous Pulsed mode and Pulsed Sequence mode, the ‘On’ time and the Duty Cycle can be
configured using the LEDn_DUR and LEDn_DUTY_CYC registers respectively.
In Pulsed Sequence mode, the number of pulses in the sequence can be selected using the
LEDn_SEQ_LEN register. On completion of the commanded number of pulses, the LED remains off
until LEDn_MODE or LEDn_SRC is changed to another value.
LED DRIVER
LED DRIVER
LED1 or
LED2
LED1 or
LED2
POWER STATE STATUS
CHARGER STATUS
LED DRIVER MANUAL MODE
Power Sequence Failure
SYSVDD Low
ON state
SLEEP state
Charger Complete
Charger On
DESCRIPTION
DESCRIPTION
Pulsed sequence
(4 pulses)
Continuous
pulsed
Constant
Continuous
pulsed
Constant
Continuous
pulsed
DRIVE MODE
DRIVE MODE
LED ‘ON’
LED ‘ON’
1s
250ms
n/a
250ms
n/a
1s
PP, December 2009, Rev 3.0
TIME
TIME
DUTY CYCLE
DUTY CYCLE
1:1
1:3
n/a
1:7
n/a
1:2
ON:OFF
ON:OFF
WM8310
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