參數(shù)資料
型號: MC68HC05F8B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PDIP56
封裝: SDIP-56
文件頁數(shù): 89/126頁
文件大?。?/td> 736K
代理商: MC68HC05F8B
MC68HC05F8
MOTOROLA
7-1
SERIAL PERIPHERAL INTERFACE
7
SERIAL PERIPHERAL INTERFACE
The serial peripheral interface (SPI) is an interface built into the MC68HC05F8 MCU which allows
two MC68HC05F8 MCUs to be interconnected within a single “black box” or on the same printed
circuit board. In a serial peripheral interface (SPI), separate wires (signals) 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 congured in one containing one master and one
slave MCUs.
Figure 7-1 illustrates a normal system congurations. In this system three basic lines (signals) are
required for the Serial Clock (SCK), Serial Data Input (SDI), and Serial Data Output (SDO) lines.
7.1
Features
Full duplex, three-wire synchronous transfer
Master or slave operation
447.5 KHz master bit frequency
1.79MHz (Max.) slave bit frequency
End of transmission interrupt ag
Data collision ag protection
7.2
Signal Description
The three basic signals (SCK, SDO and SDI) are described in the following paragraphs. Each
signal function is described for both the master and slave mode. Figure 7-2 summarizes the SPI
port timing for data exchange operation.
TPG
63
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