Serial Peripheral Interface (Spi) - Intel EP80579 Manual

Synchronous Serial Port (SSP) Interface—Intel
SSP_SCLK
SSP_TXD
SSP_SFRM
24.2.1

Serial Peripheral Interface (SPI)

Serial Peripheral Interface (SPI) is a widely use serial interconnect. Many products are
available specifically to interface to SPI. One of the most common uses of SPI is to
store boot code or data storage. Some other common applications store board revision,
serial numbers, or assembly information.
Flash device interface to the SSP port.
The following table shows how the SSP signals can be mapped when operating in SPI
mode.
SSP_SCLK
SSP_TXD
SSP_RXD
SSP_SFRN
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Outputs
• Serial Clock
• Can be left NC when the port is not connected to
an interfacing device.
• Transmit Data
• Can be left NC when the port is not connected to
an interfacing device.
• Serial Frame
• Can be left NC when the port is not connected to
an interfacing device.
Figure 152
Motorola SPI
SCLK - Serial Shift Clock
MOSI - Master Out Slave In
MISO - Master In Slave Out
/SS - Slave Select
provides an example of a Serial
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