User manual

15
1.4.1. SPI Carrier Board
The SPI carrier board includes the following elements:
SPI and control interface
The SPI serial port functionalities are available via pins 3, 5, 7, and 9. The port has
a standard signal level of 0 V through 3.3 V.
Table 5: SPI pin definition
Pin
Function
3
CLK (input)
5
MISO (output)
7
MOSI (input)
9
CS (input)
I2C interface
The integrated circuit (I2C) protocol is intended to allow multiple slave digital
circuits to communicate with one or more master circuit. As for the SPI, it is only
intended for short distance communications. The port has a standard signal level of
0 V through 3.3 V.
Power supply
The power source includes the source, the auxiliary DC output connection, the +12
V connection, the +5 V analog supply, and the +3.3 V supply.
Reference pulse
The reference pulse interacts with the receiver interface to set the reference
segment.