MC68HC08AZ60A Datasheet, PDF (250/480 Pages) Motorola, Inc – Microcontrollers

Serial Peripheral Interface (SPI)
17.12.3 SPSCK (Serial Clock) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
17.12.4 SS (Slave Select) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
17.12.5 VSS (Clock Ground) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273
17.13 I/O Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
17.13.1 SPI Control Register (SPCR) . . . . . . . . . . . . . . . . . . . . . .274
17.13.2 SPI Status and Control Register (SPSCR) . . . . . . . . . . . 276
17.13.3 SPI Data Register (SPDR) . . . . . . . . . . . . . . . . . . . . . . . . 280
17.2 Introduction
This section describes the serial peripheral interface module (SPI),
which allows full-duplex, synchronous, serial communications with
peripheral devices.
17.3 Features
Advance Information
250
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
• 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
Serial Peripheral Interface (SPI)
MC68HC08AZ60A — Rev 0.0
MOTOROLA