L9952XP datasheet(62/68 Pages) STMICROELECTRONICS

62 / 68 page

SPI control and status registers

L9952GXP

62/68

Doc ID 13518 Rev 5

Note:

RES = reserved bits.

8.1.5

Status register 1

The contents of the status register 1 can be read implicitly, while accessing the control

INH

Wakeup initiated through INH source

LIN

Wakeup initiated through LIN source

Cold Start

Set to high when the internal Power on Reset occurs.

Will be cleared with the first SPI access.

Table 55.

Configuration bit SHT5V2, WUx, INH, LIN and Cold Start (continued)

Name/state

Definition/function

Table 56.

Status register 1

LIN state

WD resets

5V restarts

State

Bit

7654

3210

Access

Reset

Name

RES

DOM

TXD

SHT

BAT

SHT

GND

TRIG

ST1

ST0

Fail

TSD

Table 57.

Configuration bit OV, UV, TW, TSDx and Vx Fail

Name

Definition, function

Over voltage failure of Vs.

Under voltage failure of Vs.

Temperature Warning: the chip temperature exceeds 130°C

TSD1

Thermal shutdown #1: The chip temperature exceeds 140°C

All Outputs, except the voltage regulator 1 are switched off.

TSD2

Thermal shutdown #2: The chip temperature exceeds 155°C

All Outputs, including the voltage regulator 1 are switched off.

V1 Fail

The output of Voltage Regulator 1 failed for at least 2µs. Conditions: (V1<2V for >2µs)

OR (V1<2V at 4ms after turn-on). ‘1’= fail

V2 Fail

The output of Voltage Regulator 2 failed for at least 2µs. Conditions: (V2<2V for >2µs)

OR (V2<2V at 4ms after turn-on). ‘1’= fail

Table 58.

Configuration bit STx

Name

Mode

ST1

ST0

Active mode

V1-standby -> a readout is wake up condition -> active mode -> 00 is read

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