Setup
Connection Specifications
maxon motor control
3-76
Document ID: rel8399
EPOS4 Positioning Controller
Edition: November 2018
EPOS4 Module/Compact 50/8 Hardware Reference
© 2018 maxon motor. Subject to change without prior notice.
CAN
AUTOMATIC
B
IT
R
ATE
D
ETECTION
With this function, the CANopen interface can be put in a “listen only” mode. For further details
sepa-
rate document EPOS4 Firmware Specification. Automatic bit rate detection is activated when the input
line is externally connected to GND.
3.4.12 Serial Peripheral Interface (SPI)
The SPI is a high-speed synchronous serial input/output port allowing the use of optional maxon exten-
sion modules.
Note
Do not connect any other signals to the SPI apart from those for the maxon extension modules!
Table 3-66
SPI – Pin assignment
Bit rate detection
Auto Bit Rate
GND
Pin B34
Pin B38
Max. input voltage
3.3 VDC
Logic 1
connected to GND
Logic 0
not connected
Module
Header
Pin
Signal
Description
B38
GND
Ground
B41
SPI_CLK
Serial Peripheral Interface clock
B42
SPI_IRQ
Serial Peripheral Interface interrupt request
B43
SPI_SOMI
Serial Peripheral Interface Slave output, Master input
B44
SPI_SIMO
Serial Peripheral Interface Slave input, Master output
B45
SPI_CS2
Serial Peripheral Interface chip select 2
B46
SPI_CS1
Serial Peripheral Interface chip select 1