WM8311GEB/V Wolfson Microelectronics, WM8311GEB/V Datasheet - Page 146

• 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

WM8311
22.3 LED DRIVER CONNECTIONS
w
Table 89 Status LED Manual Mode Control
The recommended connection for Status LEDs is illustrated in Figure 35. The LED outputs are
referenced to the SYSVDD power domain. A series resistor may be required, depending on the LED
characteristics and the SYSVDD voltage.
Figure 35 LED Connections to LED1 and LED2
ADDRESS
WM8311
BIT
1:0
LED2_DUTY_C
YC [1:0]
LABEL
GND
LED1
DEFAULT
10
SYSVDD
Pulsed or Pulsed Sequence)
00 = 1 second
01 = 250ms
10 = 125ms
11 = 62.5ms
LED2 Duty Cycle (On:Off ratio)
(when LED2_MODE = Continuous
Pulsed or Pulsed Sequence)
00 = 1:1 (50% on)
01 = 1:2:(33.3% on)
10 = 1:3 (25% on)
11 = 1:7 (12.5% on)
PP, December 2009, Rev 3.0
DESCRIPTION
Pre-Production
146