User's Manual

LE940B6 Hardware User Guide
1VV0301331 Rev. 1.8 - 2017-03-15
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8.3. 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 29: 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 18: SPI Signal Connectivity
LE940B6 (Master)
SPI_CS
SPI_CLK
SPI_MOSI
SPI_MISO
Host (Slave)
SPI_CS
SPI_CLK
SPI_MOSI
SPI_MISO