MC68HC05V12 Datasheet, PDF (101/246 Pages) Freescale Semiconductor, Inc – HCMOS Microcontreller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC05V12
Section 10. Serial Peripheral Interface (SPI)
10.1 Contents
10.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .101
10.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
10.4 SPI Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102
10.4.1 Slave Select (SS/PB0) . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
10.4.2 Serial Clock (SCK/PB1) . . . . . . . . . . . . . . . . . . . . . . . . . . .104
10.4.3 Master In/Slave Out (MISO/PB2) . . . . . . . . . . . . . . . . . . . .104
10.4.4 Master Out/Slave In (MOSI/PB3) . . . . . . . . . . . . . . . . . . . .104
10.5 SPI Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . .105
10.6 SPI Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
10.6.1 Serial Peripheral Control Register . . . . . . . . . . . . . . . . . . .107
10.6.2 Serial Peripheral Status Register . . . . . . . . . . . . . . . . . . . .109
10.6.3 Serial Peripheral Data Register . . . . . . . . . . . . . . . . . . . . .110
10.7 SPI in Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
10.8 SPI in Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111
10.2 Introduction
The serial peripheral interface (SPI) allows several MC68HC05
microcontrollers (MCUs) or an MC68HC05 MCU plus peripheral devices
to be interconnected within a single printed circuit board. In an SPI,
separate wires are required for data and clock. In the SPI format, the
clock is not included in the data stream and must be furnished as a
separate signal.
MC68HC05V12 — Rev. 2.0
Serial Peripheral Interface (SPI)
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Technical Data