sta323wqs STMicroelectronics, sta323wqs Datasheet - Page 36

• Manufacturer Part Number: sta323wqs
• Description: 2.1-channel High-efficiency Digital Audio System With Qsound Qhd??
• Manufacturer: STMicroelectronics

Register descriptions
7.1.3
7.1.4
7.1.5
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Thermal warning recovery bypass
Table 17.
If the thermal warning adjustment is enabled (TWAB=0), then the thermal warning recovery
determines if the adjustment is removed when thermal warning is negative. If TWRB=0 and
TWAB=0, then, when a thermal warning disappears, the gain adjustment determined by the
thermal warning post-scale (default = -3 dB) is removed and the gain is applied to the
system. If TWRB=1 and TWAB=0, then when a thermal warning disappears, the thermal
warning post-scale gain adjustment remains until TWRB is changed to zero or the device is
reset.
Thermal warning adjustment bypass
Table 18.
The STA323WQS on-chip power output block provides feedback to the digital controller by
the power control block inputs. The TWARN input is used to indicate a thermal warning
condition. When TWARN is active (set to 0 for a period greater than 400 ms) the power
control block forces an adjustment to the modulation limit in an attempt to eliminate the
thermal warning condition. Once the thermal warning volume adjustment is applied,
whether the gain is reapplied when TWARN is inactive, depends on the TWRB bit.
Fault detect recovery bypass
Table 19.
The DDX power block provides feedback to the digital controller using inputs to the power
control block. The FAULT input is used to indicate a fault condition (either over-current or
thermal). When FAULT is active (set to 0), the power control block attempts a recovery from
the fault by activating the tri-state output (setting it to 0 which directs the power output block
to begin recovery). It holds it at 0 for period of time in the range of 0.1 ms to 1 second as
defined by the Fault-Detect Recovery Constant register (FDRC registers 29-2Ah), then
toggles it back to 1. This sequence is repeated as long as the fault indication exists. This
feature is enabled by default but can be bypassed by setting the FDRB control bit to 1.
5
6
7
Bit
Bit
Bit
R/W
R/W
R/W
R/W
R/W
R/W
Thermal warning recovery bypass
Thermal warning adjustment bypass
Fault detect recovery bypass
0
1
1
RST
RST
RST
FDRB
TWRB
TWAB
Name
Name
Name
0: fault detector recovery enabled
1: fault detector recovery disabled
0: thermal warning adjustment enabled
1: thermal warning adjustment disabled
0: Thermal warning Recovery enabled
1: Thermal warning Recovery disabled
Description
Description
Description
STA323WQS