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SSM2380
Rev. A | Page 18 of 32
MIXER MODE
When I2C control mode is activated, the user can send left
channel input to both left and right channel outputs or send
right channel input to both outputs. This is achieved by
selecting Register R2, Bit 0 or Bit 1.
Using Mixer Mode with the ALC
If the ALC is enabled and the user also wishes to use the mixer
operation, follow the guidelines in this section. Left channel
gain controls the ALC; therefore, sending left channel input
to the left and right channel outputs poses no problem for the
ALC. However, to source the right channel input to the left and
right channel outputs when using the ALC, the user must first
load the left channel gain (Register R0, Bit 7).
With the ALC disabled, the user can also use the full mixer
capability; that is, if the user wishes to mix the right and left
inputs for both the right and left outputs, the ALC must be
disabled. If the user needs both the mixing and ALC functions,
the left or right channel must be muted to avoid problems.
When the ALC is active, the following options are acceptable:
Left output = left input; right output = right input
Left output = left input; right output = left input
Left output = right input; right output = right input
To use the following options, the ALC must be disabled:
Left output = left input + right input; right output = right
input
Left output = left input; right output = left input + right
input
Left output = left input + right input; right output = left
input + right input