NCV7708

http://onsemi.com

9

Figure 3. SPI Communication Frame Format

CSB

SI

SCLK

SO

OUTH4 OUTL5 OUTH5 OUTL6 OUTH6

OCD

ULD

OVLO

OUTH2 OUTL3 OUTH3 OUTL4

SRR

OUTL1 OUTH1 OUTL2

OUTH4 OUTL5 OUTH5 OUTL6 OUTH6

OLD

ULD

PSF

OUTH2 OUTL3 OUTH3 OUTL4

OUTL1 OUTH1 OUTL2

TW

The table below defines the programming bits and

diagnostic bits. Fault information is sequentially clocked out

the SO pin of the NCV7708 as programming information is

clocked into the SI pin of the device. Daisy chain

communication between SPI compatible IC’s is possible by

connection of the serial output pin (SO) to the input of the

sequential IC (SI).

Input Data

Bit

Number

Bit Description

Bit Status

15

Over Voltage Lock Out

Control (OVLO)

0 = Disable

1 = Enable

14

Under Load Detection Shut

Down Control (ULD)

0 = Disable

1 = Enable

13

Over Current Detection Shut

Down Control (OCD)

0 = Disable

1 = Enable

12

OUTH6

0 = Off

1 = On

11

OUTL6

0 = Off

1 = On

10

OUTH5

0 = Off

1 = On

9

OUTL5

0 = Off

1 = On

8

OUTH4

0 = Off

1 = On

7

OUTL4

0 = Off

1 = On

6

OUTH3

0 = Off

1 = On

5

OUTL3

0 = Off

1 = On

4

OUTH2

0 = Off

1 = On

3

OUTL2

0 = Off

1 = On

2

OUTH1

0 = Off

1 = On

1

OUTL1

0 = Off

1 = On

0

Status Register Reset (SRR)

0 = No Reset

1 = Reset

Output Data

Bit

Number

Bit Description

Bit Status

15

Power Supply Fail Signal

(OVLO or UVLO = PSF)

0 = No Fault

1 = Fault

14

Under Load Detect Signal

(ULD)

0 = No Fault

1 = Fault

13

Over Load Detect Signal

(OLD)

0 = No Fault

1 = Fault

12

OUTH6

0 = Off

1 = On

11

OUTL6

0 = Off

1 = On

10

OUTH5

0 = Off

1 = On

9

OUTL5

0 = Off

1 = On

8

OUTH4

0 = Off

1 = On

7

OUTL4

0 = Off

1 = On

6

OUTH3

0 = Off

1 = On

5

OUTL3

0 = Off

1 = On

4

OUTH2

0 = Off

1 = On

3

OUTL2

0 = Off

1 = On

2

OUTH1

0 = Off

1 = On

1

OUTL1

0 = Off

1 = On

0

Thermal Warning (TW)

0 = Not in TW

1 = In TW