L9969X datasheet(44/70 Pages) STMICROELECTRONICS

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MSB

TRANS_F = 1: Error detected during previous transfer (regarding the actual device, that is: chip address

valid)

3.2.7.6

SPI registers overview

In Table 28 all the commands to access the SPI registers are summarized.

Table 28. SPI registers overview

Command

INST[7..0]

Description

RD_ID

0000 0100

Read device ID

RD_REV

0000 0110

Read device Revision

RD_DIA1

0001 0000

Read power stage diagnostic information (1)

RD_DIA2

0001 1000

Read power stage diagnostic information (2)

RD_CONFIG

0000 1000

Read power stage configuration

RD_STATCON

0000 1100

Read VDD monitoring status

RD_SPECIAL

0000 1110

Read information from SPECIAL

WR_DIA1

0011 0000

Write special bits in DIA1

WR_DIA2

0011 1000

Write special bits in DIA2

WR_CONFIG

0010 1000

Write power stage configuration

WR_STATCON

0010 1100

Write VDD monitoring status

WR_SPECIAL

0010 1110

Write information to SPECIAL

All other

00xx xxxx

Unused, TRANS_F is set to high,

ff hex is sent as data bits

The SFR list describes all the different reset sources. On every SPI register detail, in the next paragraphs, the

values of the reset sources after the different resets are also shown.

Table 29. SFR List description

Reset Sources

POR

Reset after VDD is rising above VDD_POR threshold after the ASIC was disabled during VDD undervoltage.

SPIR

Reset activated by set the bit CONFIG_REG.RESET=’0’ via SPI

ENDISR

Reset by disable-enable sequence via ABE or DIS Signal (edge triggered)

DISR

Reset by disabling the power stage (DIS or ABE level triggered)

DIACLR1 Reset by setting the bit STATCON_REG.DIACLR1=’0’

DIACLR2 Reset by setting the bit STATCON_REG.DIACLR2=’0’

RDR

Reset after SPI Read out of the Register

Reset behavior of the Register content

Bit will be changed to ‘1’

Bit will be changed to ‘0’

No change of the bit content

3.2.7.6.1

Device identifier

The H-bridge’s identifier is used for production test purposes and features plug and play functionality depending

on the systems software release. It is made up of a device-number and a revision number each one read-only

accessible via standardized instructions.

L9969x

Functional description

DS14029 - Rev 6

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