DSPIS
Serial Peripheral Interface –Slave
ver 1.01
OVERVIEW
The DSPIS is a fully configurable SPI ma
slave device, designated to operate with pas-
sive devices like memories, LCD drivers etc.
The DSPIS allows user to configure polarity
and phase of serial clock signal SCK.
A serial clock line (SCK) synchronizes shift-
ing and sampling of the information on the two
independent serial data lines. DSPIS data are
simultaneously transmitted and received.
The DSPIS system is flexible enough to in-
terface directly with numerous standard prod-
uct peripherals from several manufacturers.
Data rates as high as CLK/4. Clock control
logic 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 com-
municate with passive devices. When trans-
mission starts (SS Line goes low) the first por-
tion of data is copied to the address register
and then to the ADDRESS bus output, after
transmission of the address the DSPIS gener-
ates the read signal (RD) and copy DATAI bus
contents to the transmitter shift register, and
prepare data to be exchanged with SPI Mas-
ter. During the next data portion transmission
DSPIS simultaneously transmits data out and
in. When the first data portion 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
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are trademarks of their respective owners.
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.
DSPIS is
fully customizable,
which means
it is delivered in the exact configuration to
meet users’ 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 de-
sign flow.
APPLICATIONS
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Embedded microprocessor boards
Consumer and professional audio/video
Home and automotive radio
Digital multimeters
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