STA320 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STA320 Datasheet PDF : 37 Pages
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STA320
5.6.6 IC Power Down
BIT
R/W
RST
7
R/W
1
NAME
PWDN
DESCRIPTION
IC Power Down:
0 - IC Power Down Low-Power Condition
1 - IC Normal Operation
The PWDN register is used to place the IC in a low-power state. When PWDN is written as 0, the output
will begin a soft-mute.
After the mute condition is reached, EAPD will be asserted to power down the power-stage, then the mas-
ter clock to all internal hardware expect the I2C block will be gated. This places the IC in a very low power
consumption stateConf
5.6.7 External Amplifier Power Down
BIT
R/W
RST
NAME
7
R/W
0
EAPD
DESCRIPTION
External Amplifier Power Down:
0 -External Power Stage Power Down Active
1 -Normal Operation
5.7 Volume Control Registers(Addresses 06-0Ah)
5.7.1 Mute/QXpander RegisterI
D7
D6
D5
QFILT
QXEN
0
0
D4
TFRB
1
D3
C3M
0
D2
C2M
0
D1
C1M
0
D0
MMUTE
00
5.7.2 Thermal Fault(TWARN2) Recovery Bypass
BIT
R/W
RST
4
R/W
1
NAME
TFRB
DESCRIPTION
Thermal-Fault (TWARN2) Recovery Bypass:
0 - Thermal fault recovery enabled
1 - Thermal fault recovery disabled
The TWARN2(Thermal Fault) input is used to indicate a thermal fault condition by an appropriate power
device. When TWARN2 is asserted (set to 0), the power control block will attempt a recovery from the
fault by asserting the tri-state output (setting it to 0 which directs the power output block to begin recovery),
hold it at 0 for period of time in the range of .1ms to 1 second as defined by the Fault-Detect Recovery
Constant register (FDRC registers 29-2Ah), then toggle it back to 1.
This sequence is repeated as log as the fault indication exists. This feature is disabled by default but can
be enabled by setting the TFRB control bit to 0.
5.7.3 Qxpander Enable
BIT
R/W
RST
6
R/W
0
NAME
QXEN
DESCRIPTION
Qxpander Enable:
0 - QXPander Disabled
1 - QXPander Enabled with proper security code
5.7.4 Qfilter Select
BIT
R/W
RST
7
R/W
0
NAME
QFilt
DESCRIPTION
Qfilter Select
0 - Qfilter Used
1 - Simple LPF Used
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