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MC908GR8CDWE Datasheet, PDF (298/408 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers | |||
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Freescale Semiconductor, Inc.
Serial Peripheral Interface (SPI)
20.3 Features
Features of the SPI module include:
⢠Full-duplex operation
⢠Master and slave modes
⢠Double-buffered operation with separate transmit and receive
registers
⢠Four master mode frequencies (maximum = bus frequency ÷ 2)
⢠Maximum slave mode frequency = bus frequency
⢠Serial clock with programmable polarity and phase
⢠Two separately enabled interrupts:
â SPRF (SPI receiver full)
â SPTE (SPI transmitter empty)
⢠Mode fault error flag with CPU interrupt capability
⢠Overflow error flag with CPU interrupt capability
⢠Programmable wired-OR mode
⢠I2C (inter-integrated circuit) compatibility
⢠I/O (input/output) port bit(s) software configurable with pullup
device(s) if configured as input port bit(s)
20.4 Pin Name Conventions and I/O Register Addresses
The text that follows describes the SPI. The SPI I/O pin names are SS
(slave select), SPSCK (SPI serial clock), CGND (clock ground), MOSI
(master out slave in), and MISO (master in/slave out). The SPI shares
four I/O pins with four parallel I/O ports.
Technical Data
298
MC68HC908GR8 â Rev 4.0
Serial Peripheral Interface (SPI)
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
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