STA369BWS datasheet(80/92 Pages) STMICROELECTRONICS

Part #	STA369BWS

Description	2.1-channel 40-watt high-efficiency digital audio system Sound Terminal®

PDF	92 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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80 / 92 page

STA369BWS

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DocID016861 Rev 7

7.20.2

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 26. Alternate function for INT_LINE pin

LPDP

LPD

LPDE

PNDLSL[2]

PNDLSL[1]

PNDLSL[0]

Reserved

SHEN

00000000

Table 89. External amplifier enabler configuration bits

LPDP

LPD

LPDE

Pin 32 output

INT_LINE

0010

0111

1011

1110

LPD

LPDP

Power bridge fault

INT_LINE

LPDE

“is the device in powerdown?”

STA369BWS Datasheet(PDF) 80 Page - STMicroelectronics