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SURROUND REGISTER (0x19)

TAS5086

SLES131A – FEBRRUARY 2005 – REVISED MAY 2006

Defines which channels should be running in the 2.0/2.1 mode.

The channels having their surround register set (HIGH) belong to shutdown group 1. They are associated with

VALID1. VALID1 is the signal that is driven low to disable channels when the system is operating in, for

example, stereo mode or 2.1 mode.

Example: If

PWM_1 connects to front left

PWM_2 connects to front right

PWM_3 connects to surround left

PWM_4 connects to surround right

PWM_5 connects to center

PWM_6 connects to sub

and you have a 2.1 mode, then VALID1 connects to the reset of surround left, surround right, and center.

VALID2 connects to the reset of front left, front right, and sub.

That means that the surround register (0x19) is loaded with 0001 1100b = 0x1C.

Important note: You must always change channel modes with all channels shut down (register 0x05 =

60).

Table 12. Surround Register (0x19)

FUNCTION

–

PWM_6 belongs to shutdown group 1 (VALID1)

–

PWM_6 belongs to shutdown group 2 (VALID2)

–

PWM_5 belongs to shutdown group 1 (VALID1)

–

PWM_5 belongs to shutdown group 2 (VALID2)

–

PWM_4 belongs to shutdown group 1 (VALID1)

–

PWM_4 belongs to shutdown group 2 (VALID2)

–

PWM_3 belongs to shutdown group 1 (VALID1)

–

PWM_3 belongs to shutdown group 2 (VALID2)

–

PWM_2 belongs to shutdown group 1 (VALID1)

–

PWM_2 belongs to shutdown group 2 (VALID2)

–

PWM_1 belongs to shutdown group 1 (VALID1)

–

PWM_1 belongs to shutdown group 2 (VALID2)

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