参数资料
型号: C8051F019-GQR
厂商: Silicon Laboratories Inc
文件页数: 10/154页
文件大小: 0K
描述: IC 8051 MCU 16K FLASH 48TQFP
产品培训模块: Serial Communication Overview
标准包装: 500
系列: C8051F018
核心处理器: 8051
芯体尺寸: 8-位
速度: 25MHz
连通性: SMBus(2 线/I²C),SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,温度传感器,WDT
输入/输出数: 16
程序存储器容量: 16KB(16K x 8)
程序存储器类型: 闪存
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 2.8 V ~ 3.6 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 48-TQFP
包装: 带卷 (TR)
C8051F018
C8051F019
Figure 15.2. Typical SPI Interconnection
Master
Device
MOSI
Slave
Device
NSS
Slave
Device
NSS
Slave
Device
MISO
SCK
Port
I/O
NSS
VDD
Port
I/O
Port
I/O
15.1.
Signal Descriptions
The four signals used by the SPI (MOSI, MISO, SCK, NSS) are described below.
15.1.1. Master Out, Slave In
The master-out, slave-in (MOSI) signal is an output from a master device and an input to slave devices. It is used to
serially transfer data from the master to the slave. Data is transferred most-significant bit first.
15.1.2. Master In, Slave Out
The master-in, slave-out (MISO) signal is an output from a slave device and an input to the master device. It is used
to serially transfer data from the slave to the master.
Data is transferred most-significant bit first. A SPI slave
places the MISO pin in a high-impedance state when the slave is not selected.
15.1.3. Serial Clock
The serial clock (SCK) signal is an output from the master device and an input to slave devices. It is used to
synchronize the transfer of data between the master and slave on the MOSI and MISO lines.
15.1.4. Slave Select
The slave select (NSS) signal is an input used to select the SPI module when in slave mode by a master, or to
disable the SPI module when in master mode. When in slave mode, it is pulled low to initiate a data transfer and
remains low for the duration of the transfer.
107
Rev. 1.2
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