L9949

14/20

SPI Interface – Input Data and Status Register

Input Data Register

Status Register

BIT

Function

BIT

Function

Register 0

Register 1

15

High level reset all bits in selected status

register

15

always H

always H

14

14

not used

– set to L

13

12

Control bits for standby mode and

Current monitor multiplexer

13

chargepump off

bit13

bit12

function

12

Temperature

shutdown

Temperature

warning

0

0

standby mode

11

OUT6 – HS driver

overcurrent

OUT6 – HS driver

open load

01

OUT1

1

0

OUT2

10

OUT5 – HS driver

overcurrent

OUT5 – HS driver

open load

11

OUT6

11

(1)

If the bits of HS- and LS-driver of the same output stage are high, the internal logic prevents that both drivers of this output stage can

9

OUT5 – LS driver

overcurrent

OUT5 – LS driver

open load

10

8

OUT4 – HS driver

overcurrent

OUT4 – HS driver

open load

9

7

OUT4 – LS driver

overcurrent

OUT4 – LS driver

open load

8

OUT4 – HS driver

test mode

6

OUT3 – HS driver

overcurrent

OUT3 – HS driver

open load

bit 8

bit 7

7

OUT4 – LS driver

1

1

5

OUT3 – LS driver

overcurrent

OUT3 – LS driver

open load

B-driver is active

6

OUT3 – HS driver

test mode

4

OUT2 – HS driver

overcurrent

OUT2 – HS driver

open load

bit 6

bit 5

5

OUT3 – LS driver

1

1

3

OUT2 – LS driver

overcurrent

OUT2 – LS driver

open load

A-driver is active

4

2

OUT1 – HS driver

overcurrent

OUT1 – HS driver

open load

3

1

OUT1 – LS driver

overcurrent

OUT1 – LS driver

open load

2

0

(2)

A logical NOR-combination of all bits 1 to 14 in both status registers. This bit can be polled by the micro-controller without the need

of the full SPI communication (see Figure 13). A broken VCC-connection of the L9949 can be detected by the microcontroller, bec ause

all 15 bits low or high is not a valid frame.

1

H = on; L = off; HS = highside; LS = lowside

0

Status register select bit

L: status register 0; H: status register 1