NCV7708B
http://onsemi.com
9
Figure 3. SPI Communication Frame Format
CSB
SI
SCLK
SO
OUTH4 OUTL5 OUTH5 OUTL6 OUTH6 OCD ULD OVLOOUTH2 OUTL3 OUTH3 OUTL4SRR OUTL1 OUTH1 OUTL2
OUTH4 OUTL5 OUTH5 OUTL6 OUTH6 OLD ULD PSFOUTH2 OUTL3 OUTH3 OUTL4OUTL1 OUTH1 OUTL2TW
The table below defines the programming bits and
diagnostic bits. Fault information is sequentially clocked out
the SO pin of the NCV7708B 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
*Output Bits [1:12] represent the state of the designated outputs.