L99MOD53XP datasheet(25/35 Pages) STMICROELECTRONICS

25 / 35 page

DS12617 Rev 5

25/35

L99MOD53XP

Functional description of the SPI

4.8

SPI - input data and status registers

Table 18. SPI - input data and status registers 0

Bit

Input register 0 (write)

Status register 0 (read)

Name

Comment

Name

Comment

Enable bit

If enable bit is set the device

will be switched in active

mode. If enable bit is cleared

the device go into standby

mode and all bits are cleared.

After power-on reset device

starts in standby mode.

Always 1

A broken VCC-or SPI-connection

of the L99MOD53XP can be

detected by the microcontroller,

because all 24 bits low or high is

not a valid frame.

Reset bit

If reset bit is set both status

registers will be cleared after

rising edge of CSN input.

VS overvoltage

In case of an overvoltage or

undervoltage event the

corresponding bit is set and the

outputs are deactivated. If VS

voltage recovers to normal

operating conditions outputs are

reactivated automatically (if Bit 20

of status register 0 is not set).

OC recovery duty

cycle

This bit defines in combination

with the over-current recovery

bit (Input register 1) the duty

cycle in over current condition

of an activated driver.

VS undervoltage

0: 12%

1: 25%

Overvoltage/

undervoltage

recovery disable

If this bit is set the

microcontroller has to clear

the status register after

undervoltage/overvoltage

event to enable the outputs.

Thermal shutdown

In case of a thermal shutdown all

outputs are switched off.

The microcontroller has to clear the

TSD bit by setting the reset bit to

reactivate the outputs.

Current monitor

select bits

Depending on combination of

bit 18 and 19 the current

image (1/10.000) of the

selected HS-output will be

multi-plexed to the CM output:

Temperature

warning

This TW bit is for information

purpose only. It can be used for a

thermal management by the

microcontroller to avoid a thermal

shutdown.

Bit 19 Bit 18

Output

Not ready bit

After switching the device from

standby mode to active mode an

internal timer is started to allow

charge pump to settle before the

outputs can be activated. This bit is

cleared automatically after start up

time has finished. Since this bit is

controlled by internal clock it can

be used for synchronizing testing

events (e.g. measuring filter times).

OUT8

OUT1

OUT5

OUT4

L99MOD53XP 数据表(PDF) 25 Page - STMicroelectronics

L99MOD53XP 数据表(HTML) 25 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

数据表下载