Load diagnostics mode
0x05 0x00 | 0x06 0x00 | 0x07 0x0F
Hi-Z mode
0x05 0x0F | 0x06 0x00 | 0x07 0x00
Low-low mode
0x05 0xF0 | 0x06 0x00 | 0x07 0x00
Common mode ramp
0x05 0x00 | 0x06 0x00 | 0x07 0x00
Mute mode
0x05 0x00 | 0x06 0xF0 | 0x07 0x00
Gain ramp
0x05 0x00 | 0x06 0x00 | 0x07 0x00
Play mode
0x05 0x00 | 0x06 0x0F | 0x07 0x00
Leaving low-low mode
takes about 5 ms
Leaving low-low mode
takes about 5 ms
Leaving low-low mode
takes about 5 ms
Leaving low-low mode
takes about 5 ms
Leaving low-low mode
takes about 5 ms
Option load-
diagnostic test
Load diagnostics should run
on a channel with a fault (see note A).
Only the channel with the fault
is in hi-Z mode (see note B.)
From global fault handling
Hi-Z mode
TAS54x4C Software Design Guidelines
2.6.2
Channel Faults
Channel faults are faults that occur on an individual channel. These faults are DC offset, overcurrent, and
local overtemperature faults. Only the channel that experienced the fault is placed in Hi-Z. The other
channels remain playing. The other difference between channel faults and global faults is that the fault is
no longer detectable when the channel is in hi-Z mode. Load diagnostics must be run to detect if there is a
system level error.
Figure 15. Channel Fault Handling
2.7
Device Mode Summary
Status register values are shown in blue text.
Figure 16. Mode Summary, Excluding Faults
26
TAS54x4C Design Guide
SLOA196 – June 2014
Copyright © 2014, Texas Instruments Incorporated
