WM8986_07 WOLFSON [Wolfson Microelectronics plc], WM8986_07 Datasheet - Page 49

• Manufacturer Part Number: WM8986_07
• Description: Multimedia DAC With Class D Headphone and Line Out
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
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Table 30 Disabled Outputs to VREF Resistance
A dedicated buffer is available for biasing unused analogue I/O pins as shown in Figure 26. This
buffer can be enabled using the BUFIOEN register bit.
Figure 26 summarises the bias options for the output pins.
Figure 26 Unused Input/Output Pin Tie-off Buffers
Table 31 Unused Output Pin Bias Options
R49 (31h)
L/ROUT2EN/
REGISTER
ADDRESS
OUT3/4EN
0
0
1
0
BIT
VROI
X
0
1
VROI
LABEL
1kΩ to AVDD1/2
30kΩ to AVDD1/2
Output enabled (DC level=AVDD1/2)
0
OUTPUT CONFIGURATION
DEFAULT
VREF (AVDD1/2) to analogue output
resistance
0 = approx 1kΩ
1 = approx 30 kΩ
DESCRIPTION
PP, Rev 3.1, February 2007
WM8986
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