L9965T datasheet(27/62 Pages) STMICROELECTRONICS

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Parameter

Description

CPHA

5.7.1.2

SPI frame composition

The frame format to send read/write commands to L9965T/TS is shown in the table below.

Table 25. Single Read/Write frame format

DEV_ID

Address

Data write

CRC

DEV_ID

Address feedback

Data read

CRC

The fields of the MOSI/MISO frames are described in Table 26:

Table 26. SPI frame fields description

Field

Size [bit]

Description

Value

P.A.

Data direction

0 = Answer from device

1 = Command from MCU

R/W

Read/Write request

0 = Read

1 = Write

Compressed

Compressed data type

0 = normal frame

1 = decompressed data from a

compressed burst

DEV_ID

Address of the device object of the

communication. Also used for broadcast

commands.

[0-63]

Address

Address feedback

Also used for burst commands.

[0-127]

RSVD

Reserved

FAULT

Self-detected failure

1= failure in diagnostic routines

0= no failures

DATA WRITE

Specifies the register content to be written in

Write operations. Don’t care in Read operations

Read: X

Write: [0 to 218-1]

DATA READ

Returns the register content in both Read/Write

operations

[0 to 218-1]

CRC

Checksum

[0-63]

The fault/events bits contributing to the SPI MISO frame FAULT bit and FLT interrupt pin are reported in the below

table. Each fault condition is described in detail in the related paragraph.

L9965T/L9965TS

Functional description

DS14987 - Rev 1

page 27/62

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