TLV320AIC3109EVM Software
28
SLAU738 – September 2017
Copyright © 2017, Texas Instruments Incorporated
TLV320AIC3109EVM-K
The
Configuration
control may be set as either
Fully-Differential
or
Pseudo-Differential
. This control is
used to determine if the output stage is being used to drive a fully differential output load or a output load
where one of the outputs if referenced to a common-mode voltage (pseudo-differential).
The output
Coupling
control can be chosen as either
Capless
or
AC-coupled
. This setting should
correspond to the setting of the hardware switch (SW1) on the TLV320AIC3109EVM (
CAPLESS
or
CAP
).
The common mode voltage of the outputs may be set to 1.35 V, 1.5 V, 1.65 V, or 1.8 V using the
Common Mode Voltage
control.
The TLV320AIC3109-Q1 offers several options to help reduce the turnon and turnoff pop of the output
amplifiers. The
Power-On Delay
of the output drivers can be set using the corresponding control from 0's
up to 4 seconds.
Ramp-Up Step Timing
can also be adjusted from 0ms to 4ms. The outputs can be set
to soft-step their volume changes, using the
Output Volume Soft Stepping
control, and set to step once
per Fs period, once per two Fs periods, or soft-stepping can be disabled altogether.
The high-power outputs of the TLV320AIC3109-Q1 can be configured to go to a weak common-mode
voltage when powered down. The source of this weak common-mode voltage can be set on this tab with
the
Weak Output CM Voltage Source
drop-down. Choices for the source are either a resistor divider off
the AVDD_DAC supply, or a bandgap reference. Refer to
TLV320AIC3109-Q1 Automotive, Low-Power,
for more details on this option.
Headset detection features are enabled using the
Enable
button in the
Headset Detection
group box.
When enabled, the indicators in the
HS/Button Detect
group box will light when either a button press or
headset is detected. When a headset is detected, the type of headset is displayed in the
Detection Type
indicator. Debounce times for detection are set using the
Jack Detect Debounce
and
Button Press
Debounce
controls, which offer debounce times in different numbers of milliseconds. Refer to
TLV320AIC3109-Q1 Automotive, Low-Power, 96-kHz, Mono Audio Codec
for more information regarding
headset detection.
Output short-circuit protection can be enabled in the
Short Circuit Protection
group box. Short Circuit
Protection can use a current-limit mode, where the drivers will limit current output if a short-circuit
condition is detected, or in a mode where the drivers will power down when such a condition exists.
The
I
2
C Bus Error Detection
button allows the user to enable circuitry which will set a register bit
(Register 107, D0) if an I
2
C bus error is detected.
4.10 DAC/Line Outputs Tab
The
DAC/Line Outputs
tab controls the DAC power and volume, as well as routing of digital data to the
DAC and the analog line output from the DAC. The default configuration of the
DAC/Line Outputs
tab is
shown in
