The DSPIS is a fully configurable SPI slave device, designated to operate with passive devices, like memories, LCD drivers etc. It allows you to configure polarity and phase of serial clock signal SCK. A serial clock line (SCK) synchronizes information shifting and sampling on the two independent serial data lines. Moreover, the data is simultaneously transmitted and received.
The DSPIS system is flexible enough to interface directly with numerous standard product peripherals from several manufacturers. The clock control logic (CLK/4) allows a selection of clock polarity and a choice of two fundamentally different clocking protocols to accommodate most available synchronous serial peripheral devices. The DSPIS allows the SPI Master to communicate with passive devices. When transmission starts (SS Line goes low), the first portion of data is copied to the address register and then to the ADDRESS bus output, after transmission of the address, the DSPIS generates the read signal (RD) and copy DATAI bus contents to the transmitter shift register and prepare data to be exchanged with the SPI Master. During the next portion of data transmission, the DSPIS simultaneously transfers the data out and in. When the first portion of data is received, the DSPIS asserts DATAO bus generates the write signal (WE), then increments ADDRESS bus performs a read operation and prepare another data portion to be exchanged with SPI master. Transmission is ended when the SS line goes high. The DSPIS is a technology independent design, that can be implemented in a variety of process technologies. It's also fully customizable, which means, that the configuration is tailored to your requirements. There is no need to pay extra for not used features and wasted silicon. It includes fully automated testbench with complete set of tests, allowing easy package validation at each stage of SoC design flow.