MC68HC08AS32 Datasheet, PDF (201/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Data Sheet — MC68HC08AS32
Section 14. Serial Peripheral Interface (SPI)
14.1 Introduction
This section describes the serial peripheral interface (SPI) module, which allows
full-duplex, synchronous, serial communications with peripheral devices.
14.2 Features
Features of the SPI module include:
• Full-duplex operation
• Master mode and slave mode
• 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 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
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor
Data Sheet
201