L99DZ320 datasheet(83/146 Pages) STMICROELECTRONICS

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Table 58. Global status byte

Bit 31

Bit 30

Bit 29

Bit 28

Bit 27

Bit 26

Bit 25

Bit 24

GSBN

RSTB

SPIE

PLE

Global status bit not (GSBN)

The GSBN is a logical NOR combination of Bit 24 to Bit 30. This bit can also be used as a global status flag

without starting a complete communication frame as it is present directly after pulling CSN low.

•

Reset bit (RSTB)

The RSTB indicates a device reset. In case this bit is set, specific internal control registers are set to default and

kept in that state until the bit is cleared.

The RSTB bit is cleared after a read and clear of all the specific bits in the status registers that caused the reset

event.

•

SPI error (SPIE)

The SPIE is a logical OR combination of errors related to a wrong SPI communication.

•

Physical layer error (PLE)

The PLE is a logical OR combination of errors related to the LIN and CAN FD transceivers.

•

Functional error (FE)

The FE is a logical OR combination of errors coming from functional blocks (for example high-side overcurrent).

•

Device error (DE)

The DE is a logical OR combination of errors related to device specific blocks (for example VS overvoltage, over

temperature).

•

Global warning (GW)

The GW is a logical OR combination of warning flags (for example thermal warning).

•

Fail-safe (FS)

The FS bit indicates that the device was forced into a safe state due to mistreatment or fundamental internal

errors (for example watchdog failure, voltage regulator failure).

Data out payload

The payload (data bytes 1 to 3) is the data transferred from the slave device with every SPI communication to the

master device. The payload always follows the OpCode and the address bits of the actual shifted in data (in frame

response).

4.2.3

Address definition

Table 59. Address definition - device application access

Device application access

Operating code

OC1

OC0

Table 60. Address definition - device information read access

Device information read access

Operating code

OC1

OC0

L99DZ320

Serial peripheral interface (SPI)

DS14235 - Rev 5

page 83/146

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