NCV7708B Datasheet, PDF (8/16 Pages) ON Semiconductor – Double Hex Driver

NCV7708B
CSB
5
SCLK
3
1
2
4
7
6
CSB
SO
8
9
SI
SCLK
SO
12
11
10
Figure 2. SPI Timing Diagram
SPI Communication
Standard 16−bit communication has been implemented
for the communication of this IC to turn drivers on and off,
and to report faults. (Reference the SPI Communication
Frame Format Diagram). The LSB (Least Significant Bit) is
clocked in first.
Communication is implemented as follows:
1. CSB goes low to allow serial data transfer.
2. A 16 bit word is clocked (SCLK) into the SI
(serial input) pin. The SI input signal is latched on
the falling edge of SCLK.
3. CSB goes high to transfer the clocked in
information to the data registers.
(Note: SO is tristate when CSB is high.)
4. The SI data will be accepted when a valid SPI
frame is detected. A valid SPI frame consists of
the above conditions and a complete set of
multiples of 16 bit words.
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