STA339BWS datasheet(65/79 Pages) STMICROELECTRONICS

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STA339BWS

7.11

Device status register (addr 0x2D)

This read-only register provides fault and thermal-warning status information from the power

control block. Logic value 1 for faults or warning means normal state. Logic 0 means a fault

or warning detected on power bridge. The PLLUL = 1 means that the PLL is not locked.

PLLUL

FAULT

UVFAULT

Reserved

OCFAULT

OCWARN

TFAULT

TWARN

Table 73. Status register bits

Bit

R/W

RST

Name

Description

PLLUL

PLL locked

1: PLL not locked

FAULT

0: fault detected on power bridge

1: normal operation

UVFAULT

0: VCCxX internally detected

< undervoltage threshold

Reserved

OCFAULT

0: overcurrent fault detected

OCWARN

0: overcurrent warning

TFAULT

0: thermal fault, junction temperature over limit

TWARN

0: thermal warning, junction temperature is close to

the fault condition

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