WM8310GEB/V Wolfson Microelectronics, WM8310GEB/V Datasheet - Page 46

• 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
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A separate internal RC oscillator generates the required clocks for the integrated DC-DC Converters
on the WM8310. Note that a 2MHz ‘External Power Clock’, derived from this oscillator, may be output
on a GPIO pin to provide synchronised clocking of external DC-DC Converters if required (see
Section 21). The 2MHz External Power Clock is only enabled when either of the External Power
Enable signals EPE1 or EPE2 is asserted. The External Power Enable (EPE) signals are controlled
as described in Section 15.3.
Note that the CLKOUT_ENA control register is locked by the WM8310 User Key. This register can
only be changed by writing the appropriate code to the Security register, as described in
Section 12.4.
R16528 (4090h)
Clock Control 1
R16529 (4091h)
Clock Control 2
ADDRESS
10:8
BIT
6:4
15
13
15
13
12
0
CLKOUT_EN
A
CLKOUT_OD
CLKOUT_SLO
T
CLKOUT_SLP
SLOT
CLKOUT_SR
C
XTAL_INH
XTAL_ENA
XTAL_BKUPE
NA
LABEL
DEFAULT
000
000
0
0
0
0
0
1
CLKOUT output enable
0 = Disabled
1 = Enabled
Protected by user key
CLKOUT pin configuration
0 = CMOS
1 = Open Drain
CLKOUT output enable ON slot
select
000 = Do not enable
001 = Enable in Timeslot 1
010 = Enable in Timeslot 2
011 = Enable in Timeslot 3
100 = Enable in Timeslot 4
101 = Enable in Timeslot 5
110 = Do not enable
111 = Do not enable
CLKOUT output SLEEP slot select
000 = Controlled by
CLKOUT_ENA
001 = Disable in Timeslot 5
010 = Disable in Timeslot 4
011 = Disable in Timeslot 3
100 = Disable in Timeslot 2
101 = Disable in Timeslot 1
110 = Controlled by
CLKOUT_ENA
111 = Controlled by
CLKOUT_ENA
CLKOUT output source select
0 = FLL output
1 = 32.768kHz oscillator
Crystal Start-Up Inhibit
0 = Disabled
1 = Enabled
When XTAL_INH=1, the ‘ON’
transition is inhibited until the
crystal oscillator is valid
Crystal Oscillator Enable
0 = Disabled at all times
1 = Enabled in OFF, ON and
SLEEP states
(Note that the BACKUP behaviour
is determined by
XTAL_BKUPENA.)
Selects the RTC and 32.768kHz
oscillator in BACKUP state
PP, December 2009, Rev 3.0
DESCRIPTION
Pre-Production
46