NCV7728

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15

Table 2. SPI OUTPUT DATA FRAME

Output Data

Bit Number

Bit Name

Bit Description

Bit Status

PRE_15

TSD

Latched Thermal Shutdown

0 = No Fault

1 = Fault

15

OCS

Over Current Shutdown

Global Notification

0 = No Fault

1 = Fault

14

PSF

Power Supply Failure on VS1 and/or VS2

Under Voltage and Over Voltage Monitoring

0 = No Fault

1 = Fault

13

ULD

Under Load Detection

Global Notification

0 = No Fault

1 = Fault

12

HB6

[1:0]

Half Bridge 6 Status

0x00b – Output Disable

0x01b – OCS

0x10b – ULD

0x11b – Output Enabled

11

10

HB5

[1:0]

Half Bridge 5 Status

9

8

HB4

[1:0]

Half Bridge 4 Status

7

6

HB3

[1:0]

Half Bridge 3 Status

5

4

HB2

[1:0]

Half Bridge 2 Status

3

2

HB1

[1:0]

Half Bridge 1 Status

1

0

TW

Thermal Warning

Global Notification

0 = No Fault

1 = Fault

HBx[1:0] bits are priority encoded to provide the status information of each of the half-bridge outputs. Figure 14 shows the

priority encoding state diagram for the HBx[1:0] bits.