TOBY-L4 series - System Integration Manual
UBX-16024839 - R04
System description
Page 44 of 143
1.9.3
SPI interfaces
SPI interfaces are not supported by the "50" product version.
1.9.3.1
SPI0 interface
The SPI0 1.8 V Serial Peripheral Interface supports communication with an external SPI slave devices, with the
module acting as SPI master, by means of the uCPU API, with the following pins:
SPI_MOSI
pin, SPI0 Master Output Slave Input (module output)
SPI_MISO
pin, SPI0 Master Input Slave Output (module input)
SPI_SCLK
pin, SPI0 Serial Clock (module output)
SPI_CS
pin, SPI0 Chip Select 0 (module output)
GPIO4
pin, alternatively configured as SPI0 Chip Select 1 (module output)
The SPI0 Serial Clock signal can be configured to different operating frequencies: 26 MHz (maximum frequency),
and 26 / n MHz, where n is 2, 3, 4, etc.
1.9.3.2
SPI1 interface
The SPI1 1.8 V Serial Peripheral Interface supports communication with an external SPI slave devices, with the
module acting as SPI master, by means of the uCPU API, with the following UART1 pins configured as alternative
functions, in a mutually exclusive way:
RXD1
pin, alternatively configured as SPI1 Master Output
Slave Input (module output)
TXD1
pin, alternatively configured as SPI1 Master Input Slave Output (module input)
RTS1
pin, alternatively configured as SPI1 Serial Clock (module output)
CTS1
pin, alternatively configured as SPI1 Chip Select (module output)
The SPI1 Serial Clock signal can be configured at various operating frequencies: 26 MHz (maximum frequency),
and 26 / n MHz, where n is 2, 3, 4, etc.
