ez80l92 ZiLOG Semiconductor, ez80l92 Datasheet - Page 134

• Manufacturer Part Number: ez80l92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Serial Peripheral Interface
PS013014-0107
The Serial Peripheral Interface (SPI) is a synchronous interface allowing several SPI-type
devices to be interconnected. The SPI is a full-duplex, synchronous, and character-
oriented communication channel that employs a four-wire interface. The SPI block con-
sists of a transmitter, receiver, baud rate generator, and control unit. During an SPI trans-
fer, data is sent and received simultaneously by both the master and the slave SPI devices.
In a serial peripheral interface, separate signals are required for data and clock. The SPI
may be configured as either a master or a slave. The connection of two SPI devices (one
master and one slave) and the direction of data transfer is demonstrated in
Figure
DATAIN
ENABLE
DATAIN
CLKIN
28.
SS
MISO
SS
MOSI
SCK
Bit 0
Bit 0
Baud Rate
Generator
8-Bit Shift Register
8-Bit Shift Register
Figure 27. SPI Master Device
MASTER
Figure 28. SPI Slave Device
SLAVE
Bit 7
Bit 7
SCK
MISO
DATAOUT
CLKOUT
DATAOUT
Product Specification
Serial Peripheral Interface
eZ80L92 MCU
Figure 27
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