ESPI, Enhanced Serial Peripheral Interface, is designed to replace LPC, with an operating frequency of up to 66M and a voltage of 1.8V.
Signal definition: CLK, DATA, CS, ALERT, RESET.
ESPI_CLK: The clock is sent by the master and received by the slave.
ESPI_0/1/2/3: Data pin, two-way communication.
ESPI_CS: Chip select signal, sent by the host, pulled low during communication.
ESPI_ALERT0: Warning signal sent from the slave to the host.
ESPI_RESET: Reset signal, sent by the host and received by the slave.
Actual measurement picture, the upper part is CLK and the lower part is CS.
