WM8310GEB/V Wolfson Microelectronics, WM8310GEB/V Datasheet - Page 103

• 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
17.2 BATTERY POWERED OPERATION
17.3 WALL ADAPTOR POWERED OPERATION
w
R16397
(400Dh)
System Status
Table 52 Power Source Status Registers
The WM8310 selects Battery power via BATTVDD when the battery voltage is higher than the
WALLVDD and USBVDD supply voltages. In practical usage, this means the Battery is used when
the Wall and USB supplies are both disconnected.
The battery will be used to supplement the USB or Wall Adaptor supplies when required.
If the WALLVDD or USBVDD supply becomes available during battery operation, then the selected
power source is adjusted accordingly.
When an external FET is provided between BATTVDD and SYSVDD, as described in Section 17.1,
the BATTFETENA
Table 53.
Table 53 Configuring the Battery Power Operation
The WM8310 selects Wall Adaptor power whenever this supply is within the normal operating limits
of 4.3V to 5.5V and WALLVDD is higher than BATTVDD. The Wall adaptor power source is also
selected below 4.3V if USBVDD is less than 4.3V and WALLVDD is higher than BATTVDD.
Note that USBVDD supply is not used when WALLVDD is within its normal operating limits, even if
the USBVDD supply is higher than the WALLVDD supply.
When the WALLVDD supply is selected and a Battery is connected, then battery charging is possible
in the ON or SLEEP power states; see Section 17.7.
The drive strength of the Wall FET gate connection, WALLFETENA
WALL_FET_ENA_DRV_STR register bit as described in Table 54.
Table 54 Configuring the Wall Adaptor Power Operation
R16390
(4006h)
Reset
Control
R16390
(4006h)
Reset
Control
ADDRESS
ADDRESS
ADDRESS
¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ pin functionality must be enabled by setting BATT_FET_ENA as described in
BIT
BIT
12
13
BIT
10
9
8
BATT_FET_ENA
WALL_FET_ENA_D
RV_STR
PWR_SRC_BATT
PWR_WALL
PWR_USB
LABEL
LABEL
LABEL
DEFAULT
DEFAULT
DEFAULT
0
0
0
0
0
¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯ , can be selected using the
Enables the FET gate functionality on
the BATTFETENA pin. (Note this pin is
Active Low.)
0 = Disabled
1 = Enabled
Note - this bit is reset to 0 when the
OFF power state is entered.
Sets the drive strength of the
WALLFETENA pin. (Note this pin is
Active Low.)
0 = Weak drive (500kOhm)
1 = Strong drive (50kOhm)
Battery Power Source status
0 = Battery is not supplying current
1 = Battery is supplying current
Wall Adaptor status
0 = Wall Adaptor voltage not present
1 = Wall Adaptor voltage is present
USB status
0 = USB voltage not present
1 = USB voltage is present
PP, December 2009, Rev 3.0
DESCRIPTION
DESCRIPTION
DESCRIPTION
WM8310
103