User's Manual

LE920A4 HW User Guide Hardware Interfaces
Doc#: 1VV0301261 Peripheral Ports
Rev. 4.3 Page 77 of 123 2017-12-07
Peripheral Ports
In addition to the serial ports, the module supports the following peripheral ports:
• SPI – Serial Peripheral Interface
• I2C – Inter-Integrated Circuit
• SD/MMC Card Interface
• SDIO Interface
8.5.1. SPI – Serial Peripheral Interface
The module’s SPI supports the following:
• Master mode only
• 1.8V CMOS level
• Up to 50 MHz clock rate
NOTE:
SPI is supported only on the Linux side.
The 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 17: SPI Signal Connectivity
Module (Master)
SPI_CS
SPI_CLK
SPI_MOSI
SPI_MISO
Host (Slave)
SPI_CS
SPI_CLK
SPI_MOSI
SPI_MISO