L99MOD53XP datasheet(26/35 Pages) STMICROELECTRONICS

26 / 35 page

Functional description of the SPI

L99MOD53XP

26/35

DS12617 Rev 5

OUT8 – HS on/off

If a bit is set the selected

output driver is switched On. If

the corresponding PWM

enable bit is set (input register

1) the driver is only activated if

PWM1 (PWM2) input signal is

high. The outputs of OUT1-

OUT5 are half bridges. If the

bits of HS- and LS-driver of

the same half bridge are set,

the internal logic prevents that

both drivers of this output

stage can be switched on

simultaneously in order to

avoid a high internal current

from VS to GND.

OUT8 – HS over-

current

In case of an over-current event

the corresponding status bit is set

and the output driver is disabled. If

the over-current recovery enable

bit is set (input register 1) the

output will be automatically

reactivated after a delay time

resulting in a PWM modulated

current with a programmable duty

cycle (bit 21).



If the over-current recovery bit is

not set the microcontroller has to

clear the over-current bit (reset bit)

to reactivate the output driver.

x (don’t care)

OUT7 – HS on/off

OUT7 – HS over-

current

OUT6 – HS on/off

OUT6 – HS over-

current

x (don’t care)

OUT5 – HS on/off

OUT5 – HS over-

current

OUT5 – LS on/off

OUT5 – LS over-

current

OUT4 – HS on/off

OUT4 – HS over-

current

OUT4 – LS on/off

OUT4 – LS over-

current

OUT3 – HS on/off

OUT3 – HS over-

current

OUT3 – LS on/off

OUT3 – LS over-

current

OUT2 – HS on/off

OUT2 – HS over-

current

OUT2 – LS on/off

OUT2 – LS over-

current

OUT1 – HS on/off

OUT1 – HS over-

current

OUT1 – LS on/off

OUT1 – LS over-

current

No error bit

A logical NOR-combination of all

bits 1 to 22 in both status registers.

Table 18. SPI - input data and status registers 0 (continued)

Bit

Input register 0 (write)

Status register 0 (read)

Name

Comment

Name

Comment

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