參數(shù)資料
型號: MC68HC705C9ACP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: Microcontrollers
中文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 103/160頁
文件大小: 2076K
代理商: MC68HC705C9ACP
MC68HC705C9A — Rev. 4.0
Advance Information
MOTOROLA
Serial Peripheral Interface (SPI)
For More Information On This Product,
Go to: www.freescale.com
103
Advance Information — MC68HC705C9A
Section 10. Serial Peripheral Interface (SPI)
10.1 Content
10.2
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
10.3
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
10.4
10.4.1
10.4.2
10.4.3
10.4.4
SPI Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .104
Master In Slave Out (MISO). . . . . . . . . . . . . . . . . . . . . . . .105
Master Out Slave In (MOSI). . . . . . . . . . . . . . . . . . . . . . . .105
Serial Clock (SCK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
Slave Select (SS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .106
10.5
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .107
10.6
10.6.1
10.6.2
10.6.3
SPI Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109
Serial Peripheral Control Register . . . . . . . . . . . . . . . . . . .109
Serial Peripheral Status Register . . . . . . . . . . . . . . . . . . . .111
Serial Peripheral Data I/O Register . . . . . . . . . . . . . . . . . .113
10.2 Introduction
The serial peripheral interface (SPI) is an interface built into the device
which allows several MC68HC05 MCUs, or 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. An SPI system may be configured in one
containing one master MCU and several slave MCUs, or in a system in
which an MCU is capable of being a master or a slave.
F
Freescale Semiconductor, Inc.
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