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STA369BWS bảng dữ liệu(PDF) 78 Page - STMicroelectronics

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Register description
STA369BWS
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Doc ID 16861 Rev 4
6.20.2
MISC2 (addr 0x4C)
External amplifier hardware pin enable (LPDP, LPD LPDE) bits
Pin 32 (INT_LINE), described in Table 2, normally indicates a fault condition. However,
using the following register settings, pin 32 can be reconfigured as the hardware pin enabler
for an external headphone or line amplifier.
In particular LPDE bit, when set, activates this function. Accordingly, LPD is exported to
pin 32 and in case of power down assertion pin 32 is tied to LPDP.
LPDP bit, when set, negates the value programmed as LPD value.
This is summarized in the following table.
Figure 25.
Alternate function for INT_LINE pin
D7
D6
D5
D4
D3
D2
D1
D0
LPDP
LPD
LPDE
PNDLSL[2]
PNDLSL[1]
PNDLSL[0]
Reserved
SHEN
00
00
000
0
Table 88.
External amplifier enabler configuration bits
LPDP
LPD
LPDE
Pin 32 output
xx0
INT_LINE
0010
0111
1011
1110
Y
N
0
LPD
0
1
LPDP
0
1
Power bridge fault
INT_LINE
LPDE
“is the device in powerdown?”



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