L99UDL01 datasheet(75/88 Pages) STMICROELECTRONICS

75 / 88 page

DS12511 Rev 5

75/88

L99UDL01

Programmers guide

Global Status Bit Not (GSBN)

The GSBN is a logically NOR combination of Bit 0 to Bit 6. This bit can also be used as

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, all internal Control Registers have

been set to their default values and kept in that state until the bit is cleared. This bit is

automatically cleared by any valid SPI communication.

SPI Error (SPIE)

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

SPIE bit will not be automatically cleared by a valid SPI communication. This includes:



SCK count



SDI stuck @



Write fail



Read fail



Parity error.

Figure 26. Global Status byte

D 7

D 6

D 5

D 4

D 3

D 2

D 1

D 0

GSBN

RSTB

SPIE

FE2

FE1

N/A

Table 51. GSB bit description

Global Status byte

Bit#

Data Bit

Description

GSBN

Global Status Bit NOT (active low)

RSTB

RESET bit

SPIE

SPI Error

FE2

Functional Error bit 2

FE1

Functional Error bit 1

Device Error

Global Warning

Blank

Not used

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