参数资料
型号: C8051F002R
厂商: Silicon Laboratories Inc
文件页数: 41/171页
文件大小: 0K
描述: IC 8051 MCU 32K FLASH 32LQFP
标准包装: 1
系列: C8051F00x
核心处理器: 8051
芯体尺寸: 8-位
速度: 20MHz
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: 8
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 3.6 V
数据转换器: A/D 4x12b; D/A 2x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 32-LQFP
包装: 剪切带 (CT)
其它名称: 336-1002-1
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
18.2.
Multiprocessor Communications
Modes 2 and 3 support multiprocessor communication between a master processor and one or more slave processors
by special use of the ninth data bit. When a master processor wants to transmit to one or more slaves, it first sends
an address byte to select the target(s). An address byte differs from a data byte in that its ninth bit is logic 1; in a
data byte, the ninth bit is always set to logic 0.
Setting the SM2 bit (SCON.5) of a slave processor configures its UART such that when a stop bit is received, the
UART will generate an interrupt only if the ninth bit is logic one (RB8 = 1) signifying an address byte has been
received.
In the UART’s interrupt handler, software will compare the received address with the slave’s own
assigned 8-bit address. If the addresses match, the slave will clear its SM2 bit to enable interrupts on the reception
of the following data byte(s). Slaves that weren’t addressed leave their SM2 bits set and do not generate interrupts
on the reception of the following data bytes, thereby ignoring the data. Once the entire message is received, the
addressed slave resets its SM2 bit to ignore all transmissions until it receives the next address byte.
Multiple addresses can be assigned to a single slave and/or a single address can be assigned to multiple slaves,
thereby enabling “broadcast” transmissions to more than one slave simultaneously. The master processor can be
configured to receive all transmissions or a protocol can be implemented such that the master/slave role is
temporarily reversed to enable half-duplex transmission between the original master and slave(s).
Figure 18.7. UART Multi-Processor Mode Interconnect Diagram
Master
Device
Slave
Device
TX
RX
TX
Slave
Device
RX
TX
Slave
Device
RX
TX
VDD
135
Rev. 1.7
相关PDF资料
PDF描述
PIC18F442-I/P IC MCU FLASH 8KX16 EE A/D 40DIP
PIC32MX340F256H-80I/PT IC PIC MCU FLASH 256K 64-TQFP
PIC16LF874A-I/PT IC PIC MCU FLASH 4KX14 44TQFP
PIC24HJ128GP510-I/PT IC PIC MCU FLASH 128KB 100TQFP
DSPIC33FJ128MC804-I/ML IC DSPIC MCU/DSP 128K 44QFN
相关代理商/技术参数
参数描述
C8051F005 功能描述:8位微控制器 -MCU 32KB 12ADC RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
C8051F005/0046 制造商:Silicon Laboratories Inc 功能描述:
C8051F005DK 功能描述:开发板和工具包 - 8051 MCU DEVELOPMENT KIT W/ US POWER SUPPLY RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压:
C8051F005DK-A 功能描述:DEV KIT FOR C8051F005/F006/F007 RoHS:否 类别:编程器,开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK(80-QFP ZIF 插口) 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035
C8051F005DK-B 功能描述:DEV KIT FOR C8051F005/F006/F007 RoHS:否 类别:编程器,开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 类型:MCU 适用于相关产品:Freescale MC68HC908LJ/LK(80-QFP ZIF 插口) 所含物品:面板、缆线、软件、数据表和用户手册 其它名称:520-1035