sta335ml STMicroelectronics, sta335ml Datasheet - Page 11

• Manufacturer Part Number: sta335ml
• Description: 2-channel Microless High-efficiency Digital Audio System Sound Terminaltm
• Manufacturer: STMicroelectronics

STA335ML
4.2
4.3
4.4
4.5
4.6
4.7
Fault detect recovery bypass
The on-chip STA335ML power output 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 asserted (set to 0), the power control block attempts
a recovery from the fault by asserting the 3-state output (setting it to 0 which directs the
power output block to begin recovery), holds it at 0 for 1 ms and then toggles it back to 1.
This sequence is repeated for as long as the fault exists.
Zero-detect mute enable
If this function is enabled, the zero-detect circuit examines each processing channel to see if
2048 consecutive zero value samples (regardless of fs) are received. If so the channel is
muted.
Fade-in/out feature
The STA335ML has internal fade-in / fade-out feature when powered on or off, or after a
fault condition.
Oversampling selector
Pin ONSEL (33) is used to configure the PLL to accept 256 * fs or 384 * fs master clock.
Where fs is the I
Gain selector
Pin GAIN (34) is used to configure the STA335ML gain:
Power-down function
Pin PWDN (23) is used to power down the STA335ML:
If the power stage is switched off then the PLL is also switched off.
It is possible to use the PWDN function as a mute function.
ONSEL = logical 0 gives 256 * fs
ONSEL = logical 1 gives 384 * fs.
GAIN = logical 0 gives 0 dBFs
GAIN = logical 1 gives 24 dBFs.
PWDN = logical 0 sets the power down mode
PWDN = logical 1 gives normal operation.
2
S LRCKI frequency:
Doc ID 17638 Rev 3
Functional description
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