MC68HC708MP16 Datasheet, PDF (252/398 Pages) Freescale Semiconductor, Inc – Microcontrollers

Serial Peripheral Interface Module (SPI)
13.14 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
13.14.1 SPI Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
13.14.2 SPI Status and Control Register . . . . . . . . . . . . . . . . . . . .279
13.14.3 SPI Data Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
13.2 Introduction
The SPI allows full-duplex, synchronous, serial communications with
peripheral devices.
13.3 Features
Features of the SPI module include the following:
• 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
• Clock ground for reduced radio frequency (RF) interference
• Serial clock with programmable polarity and phase
• Two separately enabled interrupts with CPU service:
– SPRF (SPI receiver full)
– 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
Technical Data
252
Serial Peripheral Interface Module (SPI)
MC68HC708MP16 — Rev. 3.1
Freescale Semiconductor