L9969X datasheet(50/70 Pages) STMICROELECTRONICS

50 / 70 page

Bit

ENDISR

DISR

RDR

Controller access: read/write

(write-access: WR_STATCON)

(read-access: RD_STATCON)

Bit

Name

Description

CONFIG2

‘1’: test of VDD threshold is switched off

(latched)

‘0’: test of VDD threshold is switched on

(r/w)

CONFIG1

‘1’: lower threshold of VDD-monitoring is lifted

(If CONFIG2 = 0 - test of switch-off path)

(latched)

‘0’: upper threshold of VDD-monitoring is reduced

(If CONFIG2 = 0 - test of switch-off path)

(r/w)

CONFIG0

‘1’: latch function for overvoltage at VDD is

switched on

(latched)

‘0’: latch function for overvoltage at VDD is

switched off

(r/w)

DIACLR2

if set = 0: all previous errors of DIA_REG2 are

reset

(not latched)

if set = 1: no action

(r/w)

if read then always = 1

DIACLR1

if set = 0 then all latched errors of DIA_REG1 are to be transferred to the register

DIA_REG2 and DIA_REG1 is reset.

Exception is: if an undervoltage at pin VS is present, DIACLR1 will not have any

effect.

if set = 1: no action

(not latched)

if read then always = 1

(r)

STATUS2

Logic level at NABE

(r)

STATUS1

‘1’: no undervoltage at VDD

(not latched)

‘0’: undervoltage at VDD

(r)

STATUS0

‘1’: no overvoltage at VDD

‘0’: overvoltage at VDD resp. state of overvoltage

still stored (reset by CONFIG0 = ’0’)

(r)

Comment: overvoltage information (bit STATUS0 =

0) will not be reset by undervoltage at VS.

Overvoltage will even be detected and stored

(CONFIG0 = 1) during undervoltage at VS. The

information will be reset if an internal

(undervoltage at VDD) reset occurs or when

CONFIG0 is set to 0 or via SPI reset

(CONFIG_REG.RESET = 0).

Remarks:

Write-access is only possible for CONFIGx and DIACLRx. The bits STATUSx are not affected by a write-access to

STATCON_REG, except indirectly by a change of CONFIGx.

Any write access to STATCON_REG will take effect immediately. No re-enabling via switching (DIS to HIGH and

then to LOW again) or (NABE via switching to Low and then to High again) is necessary.

L9969x

Functional description

DS14029 - Rev 6

page 50/70

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