STA321 datasheet(63/157 Pages) STMICROELECTRONICS

部件名	STA321

功能描述	4-channel digital audio system with FFX??driver

PDF	157 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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63 / 157 page

STA321

Fault detection and recovery

Doc ID 15351 Rev 3

63/157

Fault detection and recovery

9.1

External amplifier

When Fault is reported on pin EAFTN and bit EA_TSFT_ON of register FFXCFG2 on

page 83 is active, then pin EATSN is reset to 0 and the embedded bridge outputs are put in

the high-impedance state. When the fault signal disappears (that is, goes to 1) the

embedded bridge is kept in 3-state for a time defined in register EATTF0-1 on page 86, after

which time the outputs recover.

9.2

CMOS bridge

When Fault is reported to the digital core and CB_TSFT_ON of register FFXCFG2 on

page 83 is active then the tristate is activated thus putting the STA321 OUTn outputs in the

high-impedance state. When the fault signal disappears, the CMOS bridge is kept in 3-state

status for a time defined in register CBTTF0-1 on page 88, after which time the outputs

recover.

STA321 数据表(PDF) 63 Page - STMicroelectronics