参数资料
型号: MC68HC05G1B
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: SDIP-56
文件页数: 89/124页
文件大小: 732K
代理商: MC68HC05G1B
MC68HC05G1
MOTOROLA
8-1
SERIAL PERIPHERAL INTERFACE
8
SERIAL PERIPHERAL INTERFACE
The serial peripheral interface (SPI) is an interface built into the MC68HC05G1 microcontroller
which allows several SPI microcontrollers, or SPI-type peripherals to be interconnected within a
single “black box” or on the same printed circuit board. In a serial peripheral interface, 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 as
one containing one master MCU and several slave MCUs, or as a system in which an MCU is
capable of being either a master or slave.
Figure 8-1 illustrates two different system congurations. Figure 8-1(a) represents a system of ve
different microcontrollers in which there is one master and four slaves (0,1,2,3). In this system four
basic lines (signals) are required for MOSI (master out slave in), MISO (master in slave out), SCK
(serial clock), and SS (slave select) lines. Figure 8-1(b) represents a system of ve
microcomputers in which three can be either master of slave and two are slave only.
8.1
SPI Features
Full Duplex, Three-Wire Synchronous Transfers
Master or Slave Operation
1.288 MHz (Max.) Master Bit Frequency
2.4576 MHz (Max.) Slave Bit Frequency
Four programmable Master Bit Rates
Programmable Clock Polarity and Phase
End of Transmission Interrupt Flag
Data Collision Flag Protection
Master-Master Mode Fault Protection Capability
TPG
63
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