Output Activating/write Table 1

Status

CSN R/WN MODE

D0

D1

D2

D3 OUT1 OUT2 OUT3 OUT4 OUT5

FUNCTION

1

1

X

X

X

X

X

X

AB

AB

AB

AB

AB

Hold output behavious as

programmed before

2

_

0

0

0

0

0

0

T

T

T

T

T

All Outputs, Standby mode

3

_

0

0

0

0

1

0

SRC

T

T

SNK

T

M1, right

4

_

0

0

1

1

0

0

SNK

T

T

SRC

T

M1, left

5

_

0

0

1

0

1

0

T

SRC

T

SNK

T

M2, right

6

_

0

0

0

1

0

0

T

SNK

T

SRC

T

M2, left

7

_

0

0

0

1

1

0

T

T

SRC

SNK

T

M3, right

8

_

0

0

1

0

0

0

T

T

SNK

SRC

T

M3, left

9

_

0

0

1

1

1

0

SNK

SNK

SNK

SNK

T

Braking

10

_

0

0

0

0

0

1

T

T

T

T

SRC

High side driver

Notes:

Where CSN = 0 the device is (for t

≤ 100µs) transparent, in this condition any change of Data D0 .... D3

will lead to the apprpriate output response.

Deselecting the circuit (CSN

) the last programmed status will be stored.

Diagnostic / read. Table 2:

In readout modes the port D0 .... D3 is acting as an output showing the conditions detected before.

Status

CSN

R/WN

MODE

D0

D1

D2

D3

Function

11

_

1

0

OUT1

OUT2

OUT3

OUT4

OUT1,

OUT2,

OUT3,

OUT4;

12

_

1100

OT

OUT5

•

No failure,

OT,

OUT5;

13

_

1110

OT

OUT5

•

OVC1,

OT,

OUT5;

14

_

1101

OT

OUT5

•

OVC2,

OT,

OUT5;

15

_

1111

OT

OUT5

OVV

or OVV + OVC1

or OVV + OVC2

OT,

OUT5;

Diagnostic / write. Table 3:

Diagnostic modes are used to check the load status for broken or shorted wires.

Status CSN R/WN MODE D0 D1 D2 D3 OUT1

OUT2

OUT3

OUT4

OUT5

Function

16

_

0

1

0

1

0

X

T

T

T

140mA

SRC

T

17

_

0

1

1

0

0

X

T

T

T

140mA

SNK

18

_

0

1

0

1

1

X

10mA

SNK

10mA

SNK

10mA

SNK

140mA

SRC

10mA

SRC

Standby and clear / write. Table 4:

Status CSN R/WN MODE D0 D1 D2 D3 OUT1

OUT2

OUT3

OUT4

OUT5

Function

19

_

0

0

1

1

1

1

T

T

T

T

T

Clear

20

0

X

X

XXXX

T

T

T

T

T

Clear, Static CSN = 0 will

force clear status and

standby after 100

µs

without respect of data

inputs

Symbols:

1: Logic High

0: Logic Low

T: Tristate

X: Don’t care

AB: As before

_ Low pulse t < 100µs

SRC: Source

SNK: Sink

OT: Overtemperature

OVC1: Overcurrent 1

OVC2: Overcurrent 2

OVV: Overvoltage

OUTX:

- High if output voltage

- Low if output voltage

L9947

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