WM8976GEFL/V Wolfson Microelectronics, WM8976GEFL/V Datasheet - Page 65

• Manufacturer Part Number: WM8976GEFL/V
• Description: Audio CODECs Mono ADC Stereo DAC with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8976GEFL/V

• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Production Data
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Figure 34 Unused Input/Output Pin Tie-off Buffers
Table 53 Unused Output Pin Tie-off Options
A dedicated buffer is available for tying off unused analogue I/O pins as shown in Figure 34. This
buffer can be enabled using the BUFIOEN register bit.
If the SPKBOOST, OUT3BOOST or OUT4BOOST bits are set then the relevant outputs will be tied to
the output of the DC level shift buffer at 1.5xAVDD/2 when disabled.
Figure 34 summarises the tie-off options for the speaker and mono output pins.
L/ROUT2EN/
OUT3/4EN
0
0
0
0
1
1
OUT3BOOST/
OUT4BOOST/
SPKBOOST
0
0
1
1
0
1
VROI
X
X
0
1
0
1
1kΩ tie-off to AVDD/2
30kΩ tie-off to AVDD/2
1kΩ tie-off to 1.5xAVDD/2
30kΩ tie-off to 1.5xAVDD/2
Output enabled (DC level=AVDD/2)
Output enabled (DC level=1.5xAVDD/2)
OUTPUT CONFIGURATION
PD Rev 4.4 July 2009
WM8976
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