L9678P datasheet(49/203 Pages) STMICROELECTRONICS

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L9678P, L9678P-S

SPI interface

202

5.1

Global SPI register

A summary of all the read/write registers contained within the SPI map are shown below

and are further referenced throughout the specification as they apply. The SPI register

tables also specify the effect of the internal reset signals assertion on each bit field (the

symbol '-' is used to indicate that the register is not affected by the relevant reset signal).

Global status word

L9678P contains an 11-bit word that returns global status information. The GSW is the most

significant 11 bits of SPI_MISO data.

R/W/RW

-R

Description

GSW

Global Status Word

MISO BIT

2726

2423

MISO

GSW

BIT

432

Table 7. Global status word (GSW)

Bit

Name

POR WSM SSM

Description

SPIFLT

SPI Fault, set if previous SPI frame had wrong parity check or wrong

number of bits, cleared upon read

0 No fault

1 Fault

DEPOK

General Deployment Successful Flag, logical OR of the corresponding

CHxDS bits (bit 15) in DSRx Registers

0 All the DSRx-CHDS bits are 0

1 At least one of the DSRx-CHDS bits is 1

8RSFLT

Remote Sensor Interface Fault Present, logical OR of the corresponding

FLTBIT bits (bit 15) in RSDRx Registers

0 All the RSDRx-FLTBIT bits are 0

1 At least one of the RSDRx-FLTBIT bits is 1

WDTDIS_S

State of WDTDIS pin

0 WDTDIS = 0

1 WDTDIS = 1

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