WM8311GEB/V Wolfson Microelectronics, WM8311GEB/V Datasheet - Page 73

• Manufacturer Part Number: WM8311GEB/V
• Description: POWER MANAGEMENT SUBSYSTEM, 121BGA
• Manufacturer: Wolfson Microelectronics

Specifications of WM8311GEB/V

• Supply Voltage: 5.5V
• No. Of Step-down Dc - Dc Converters: 4
• No. Of Ldo Regulators: 7
• Digital Ic Case Style: BGA
• No. Of Pins: 121
• No. Of Regulated Outputs: 9
• Operating Temperature Range: -40°C To
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pre-Production
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The Enable and Status register bits for the External Power Enable (EPE) Controls are defined in
Table 35.
R16464 (4050h)
DCDC Enable
R16466 (4052h)
DCDC Status
Table 35 External Power Enable (EPE) Control
15.12.2 DC-DC (BUCK) CONVERTER CONTROL
The register controls for configuring the DC-DC (Buck) Converters 1-3 are defined in Table 36.
Note that the DCm_ON_SLOT fields and the 5 MSBs of DCm_ON_VSEL may also be stored in the
integrated OTP memory. See Section 14 for details.
R16470 (4056h)
DC1 Control 1
ADDRESS
ADDRESS
15:14
BIT
BIT
9:8
5:4
12
7
6
7
6
7
EPE2_ENA
EPE1_ENA
EPE2_STS
EPE1_STS
DC1_RATE
[1:0]
DC1_PHASE
DC1_FREQ
[1:0]
DC1_FLT
DC1_SOFT_
START [1:0]
LABEL
LABEL
DEFAULT
DEFAULT
10
00
00
0
0
0
0
0
0
EPE2 Enable request
0 = Disabled
1 = Enabled
(Note that the actual status is indicated
in EPE2_STS)
EPE1 Enable request
0 = Disabled
1 = Enabled
(Note that the actual status is indicated
in EPE1_STS)
EPE2 Status
0 = Disabled
1 = Enabled
EPE1 Status
0 = Disabled
1 = Enabled
DC-DC1 Voltage Ramp rate
00 = 1 step every 32us
01 = 1 step every 16us
10 = 1 step every 8us
11 = Immediate voltage change
DC-DC1 Clock Phase Control
0 = Normal
1 = Inverted
DC-DC1 Switching Frequency
00 = Reserved
01 = 2.0MHz
10 = Reserved
11 = 4.0MHz
DC-DC1 Output float
0 = DC-DC1 output discharged when
disabled
1 = DC-DC1 output floating when
disabled
DC-DC1 Soft-Start Control
(Current limiting is stepped through 8
intermediate steps.)
00 = 31.25us steps (250us max total)
01 = 62.5us steps (500us max total)
10 = 125us steps (1000us max total)
11 = 250us steps (2000us max total)
PP, December 2009, Rev 3.0
DESCRIPTION
DESCRIPTION
WM8311
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