STA323WQS13TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA323WQS13TR

2.1-channel high-efficiency digital audio system with QSound QHD®

STMicroelectronics 

User-programmable settings

STA323WQS

8.10.3

PLL unlock indicator

Table 72. PLL unlock indicator

Bit

R/W

RST Name

Description

0: normal operation (PLL is in a locked state)

7

RO

0

PLLUL 1: PLL unlock is detected (due to probable

clock loss)

Under normal conditions (with the correct clock) the PLL is locked into an internal clocking

frequency. However, if the clock is insufficient or if it is abruptly lost, the PLL lock state is lost

and this information is relayed to the user via setting the PLLUL bit of the Status register

to 1. As soon as the PLL reverts back to a locked state, this bit is set to 0.

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