User Manual

Page 45 of 129 54A0028-6 042019 © LeddarTech Inc.
Communication Interfaces
The interfaces and links are optional and are implemented depending on your configuration.
5.1. SPI Interface
The SPI interface on the SPI board is a direct link to the receiver module.
The SPI interface available with the USB, CAN and SERIAL board is a port connected to MCU but
not implemented for the moment.
5.1.1. SPI Basics
The SPI interface uses the configuration mode 0; where, data is captured on the rising edge of the
clock signal and outputted on the falling.
8
8
8
7
7
7
6
6
6
5
5
5
4
4
4
3
3
3
2
2
2
1
1
1
8
8
8
7
7
7
6
6
6
5
5
5
4
4
4
3
3
3
2
2
2
1
1
1
SCK
SS
CPOL=0
CPOL=1
z
z
CPHA=0
Cycle #
MISO
MOSI
z
z
z z
z z
CPHA=1
Cycle #
MISO
MOSI
Figure 21: Standard SPI timing diagram
Table 13 below presents the basic clock signal modes.