Texas Instruments TPA311 - Manual (Page 23)

Using The TPA311 EVM With the Plug-N-Play Evaluation Platform
3-9 Details
3.3.3.2 Mute/Mode Select (JP6)
A 3-pin jumper header (JP6) on the platform, functioning as a SPDT switch,
routes the control signal from the headphone jack to either the mute control
input pin or the mode control input pin of the evaluation module.
J To mute the TPA311 amplifier module using the control signal from the
platform headphone jack, jumper JP6 to MUTE
J To switch the output mode of the TPA311 amplifier between BTL and
single-ended using the control signal from the platform headphone
jack, jumper JP6 to MODE
3.3.3.3 Mute/Mode Polarity Select (JP8)
A second 3-pin jumper header (JP8) on the platform selects the control signal
polarity by connecting either the active-high or the active-low line from the
headphone jack to jumper JP6.
- When JP6 is set to mute, use the following JP8 settings for the TPA311:
J To mute the TPA311 amplifier module when a plug is inserted into the
headphone jack, jumper JP8 to Hi (this is the typical setting).
J To mute the TPA311 amplifier module until a plug is inserted into the
headphone jack, jumper JP8 to Lo.
- When JP6 is set to mode, use the following JP8 settings for the TPA311:
J To switch the TPA311 amplifier module to the single-ended output
mode when a plug is inserted into the headphone jack, jumper JP8 to
Hi (this is the typical setting).
J To switch the TPA311 amplifier module to the BTL output mode when a
plug is inserted into the headphone jack, jumper JP8 to Lo.