LE940B6 HW User Guide
Rev. 2.02
Page 79 of 111
2020-01-10
Peripheral Ports
In addition to the LE940B6 serial ports, the LE940B6 supports the following peripheral
ports:
•
SPI
– Serial Peripheral Interface
•
I2C - Inter-integrated circuit
•
Ethernet
– Ethernet PHY Interface
8.3.1.
SPI
– Serial Peripheral Interface
The LE940B6 SPI supports the following:
•
Master Mode only
•
1.8V CMOS level
•
Up to 26 MHz clock rate
NOTE:
SPI is supported only on the Linux side.
The LE940B6 module supports Master mode only and cannot be configured
as Slave mode.
Table 28: SPI Signals
PAD
Signal
I/O
Function
Type
Comment
P19
SPI_CLK
O
SPI clock output
1.8V
M19
SPI_MISO
I
SPI data Master input Slave
output
1.8V
K19
SPI_MOSI
O
SPI data Master output Slave
input
1.8V
N18
SPI_CS
O
SPI chip-select output
1.8V
Figure 21: SPI Signal Connectivity
LE940B6
(Master)
SPI_CS
SPI_CLK
SPI_MOSI
SPI_MISO
Host (Slave)
SPI_CS
SPI_CLK
SPI_MOSI
SPI_MISO
Provided
to
Dekra
under
NDA
Distribution
is
Prohibited
except
for
Dekra
employees
with
a Need
to
know
