These sequences are intended to give the user a good starting point for his software development. Be-

sides these two there are further possibilities how to implement control sequences for this device (other

currents, quarters step etc.).

SDI

SDO

A

O

P

E

N

B

O

P

E

N

A1

S

H

O

R

T

VS

A2

S

H

O

R

T

VS

B1

S

H

O

R

T

VS

B2

S

H

O

R

T

VS

A1

*)

S

H

O

R

T

GND

A2

*)

S

H

O

R

T

GND

B1

*)

S

H

O

R

T

GND

B2

*)

S

H

O

R

T

GND

therm.

alarm

therm.

shut

down

(reset

operating

codes)

bit

76543210

76543210

76

76

76

76

76

76

76

76

76

76

76

76543210

XX111111

XX011111

XX011111

XX011111

XX011011

XX111011

XX010011

XX010111

XX010010

XX110010

XX011010

XX011110

XX011011

XX111011

XX010011

XX010111

XX010010

XX110010

previous code

11111111

11011111

11011111

11011111

11011111

11011011

11111011

11010011

11010111

11110010

11011010

11011110

11011011

11111011

11010011

11010111

11010010

11

11

11

11

11

01

11

11

11

01

11

11

11

01

11

11

11

11

11

11

11

11

11

11

01

11

11

11

01

11

11

11

01

11

11

11

11

11

11

01

01

01

01

01

11

11

01

01

01

01

01

11

01

01

01

01

01

11

11

11

01

01

01

01

01

11

11

11

11

11

11

11

11

11

11

01

01

01

01

01

11

11

11

01

01

11

11

11

11

01

01

01

01

11

11

11

01

01

01

01

01

11

11

10

10

10

10

01

11

11

11

11

10

01

10

01

11

11

11

11

11

11

11

11

11

10

10

10

01

11

11

11

11

10

10

10

11

11

11

11

10

10

10

01

11

11

11

11

10

10

10

01

11

11

11

11

11

11

11

11

11

10

10

10

01

11

11

11

11

10

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

00111111

Double errors: Double errors will create composite codes by an AND operation between columns of the

same dominance. Open and short to VS are the least dominant error codes. (first 6 error code columns).

Short to ground is the second dominant error code. detection of short to gnd will overwrite error codes of

the least dominant kind (open, short to VS). Temperature prealarm and thermal shut down are the most

dominant error codes. Thermal prealarm returns error code 00 but the device still is working and returns

the appropriate operation code (bits 0..5).

Thermal shut down returns error code 00 and turns off the device. The opcode returned corresponds the

action eventually performed (bit 0..5 become 1).

For example open bridge A and simultaneously open bridge B will lead to error code 01 by performing

an AND operation between the two corresponding columns.

Electromagnetic Emission classification(EME)

Electromagnetic Emission classes presented below are typical data found on bench test. For detailed test de-

scription please refer to ’Electromagnetic Emission (EME) Measurement of Integrated Circuits, DC to 1GHz’ of

VDE/ZVEI work group 767.13 and VDE/ZVEI work group 767.14 or IEC project number 47A 1967Ed. This data

is targetedto boarddesigners to allow an estimation of emission filtering effortrequired in application.

Pin

EME class

Remark

GND

E

10

0

1

Ω test

E

e

Blocked with 100nF closemto the device

EN. SDI, CSN, CSK, SDO in tristate

K

h

SDO

G

f

SDO in low-Z state, no data transfer

E

5

f

Sourcing output

6

f

Electromagnetic Emission is not tested in production.

*) Motor resistance approximatelly 10

the motor may lead to detection of short to ground on both branches of the bridge leading to code 10 on all steps.

L9935

15/19