L9969T datasheet(54/70 Pages) STMICROELECTRONICS

54 / 70 page

3.2.7.8

Logic inputs and outputs

Figure 31. Inputs/outputs of the H-bridge

DIS

SCK

PWM

DIR

VDD

GND

ABE

Result of

RD_DIA

command

Logic

and

SPI

MUX

Internal supply

≥1

with undervoltage

detection

SPI reset

Supply with

undervoltage

detection

Enable

Reset of

diagnostic

Diagnostic

Control

H-bridge

Note:

•

Both NABE and DIS release the power stages.

•

VDD monitoring sets NABE → low, in case VDD is out of the operational range.

3.2.7.8.1

Logic I/O electrical characteristics

Table 43. Logic I/O electrical characteristics

Symbol

Parameter

Condition

Min Typ

Max

Unit

Pin DIR, PWM

VINx_L

input low level

-0.3

0.8

VINx_H

input high level

2.0

VDD + 0.3

VINx_HYS input hysteresis

0.15

1.0

IpuINx

Pullup current

VINx = 0 V

µA

IINx

input current VINx > 3.0 V (without Pull Up)

-5

µA

CINx

Input capacity

Pin DIS

VDIS_L

input low level

-0.3

0.8

VDIS_H

input high level

2.0

VDD + 0.3

VDIS_HYS input hysteresis

0.15

1.0

IPUDIS

Pullup current

0 V < VDISx < 2.1 V 50 100

150

µA

L9969x

Functional description

DS14029 - Rev 6

page 54/70

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