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參數資料
型號: MC68HCL05C9A
廠商: Motorola, Inc.
元件分類: 8位微控制器
英文描述: 8-Bit Microcontroller(8位微控制器)
中文描述: 8位微控制器(8位微控制器)
文件頁數: 94/160頁
文件大小: 783K
代理商: MC68HCL05C9A
L
G
R
Serial Peripheral Interface
General Release Specification
MC68HC05C9A
Rev. 4.0
94
Serial Peripheral Interface
MOTOROLA
The SPI is double buffered on read, but not on write. If a write is
performed during data transfer, the transfer occurs uninterrupted, and
the write will be unsuccessful. This condition will cause the write collision
(WCOL) status bit in the SPSR to be set. After a data byte is shifted, the
SPIF flag of the SPSR is set.
In the master mode, the SCK pin is an output. It idles high or low,
depending on the CPOL bit in the SPCR, until data is written to the shift
register, at which point eight clocks are generated to shift the eight bits
of data and then SCK goes idle again.
In a slave mode, the slave select start logic receives a logic low at the
SS pin and a clock at the SCK pin. Thus, the slave is synchronized with
the master. Data from the master is received serially at the MOSI line
and loads the 8-bit shift register. After the 8-bit shift register is loaded, its
data is parallel transferred to the read buffer. During a write cycle, data
is written into the shift register, then the slave waits for a clock train from
the master to shift the data out on the slave’s MISO line.
Figure 10-3
illustrates the MOSI, MISO, SCK, and SS master-slave
interconnections.
Figure 10-3. Serial Peripheral Interface Master-Slave
Interconnection
SPI SHIFT REGISTER
7 6 5 4 3 2 1 0
SPI SHIFT REGISTER
7 6 5 4 3 2 1 0
SPDR ($000C)
SPDR ($000C)
PD3/MOSI
PD2/MISO
PD5/SS
PD4/SCK
MASTER MCU
SLAVE MCU
I/O PORT
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相關代理商/技術參數
參數描述
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MC68HCP11E0FNE 功能描述:8位微控制器 -MCU 8B MCU 512RAM COP A/D RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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