參數(shù)資料
型號: C8051F006
廠商: Cygnal Technologies
英文描述: 25 MIPS,32k Flash,2.25k Ram,12bit ADC,48 Pin MCU(25 MIPS,32k 閃速存儲器,2.25k Ram,12位 ADC,48 腳 MCU)
中文描述: 25 MIPS的,32K閃存,2.25k羊,12位ADC,48引腳微控制器(25 MIPS的,32K的閃速存儲器,2.25k羊,12位ADC和48腳微控制器)
文件頁數(shù): 130/170頁
文件大?。?/td> 1294K
代理商: C8051F006
Page 130
CYGNAL Integrated Products, Inc.
2001
4.2001; Rev. 1.3
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
PRELIMINARY
18.1.
The UART provides four operating modes (one synchronous and three asynchronous) selected by setting
configuration bits in the SCON register. These four modes offer different baud rates and communication protocols.
The four modes are summarized in Table 18.1 below. Detailed descriptions follow.
UART Operational Modes
Table 18.1. UART Modes
Mode
0
1
2
3
Synchronization
Synchronous
Asynchronous
Asynchronous
Asynchronous
Baud Clock
SYSCLK/12
Data Bits
8
8
9
9
Start/Stop Bits
None
1 Start, 1 Stop
1 Start, 1 Stop
1 Start, 1 Stop
Timer 1 or Timer 2 Overflow
SYSCLK/32 or SYSCLK/64
Timer 1 or Timer 2 Overflow
18.1.1. Mode 0: Synchronous Mode
Mode 0 provides synchronous, half-duplex communication. Serial data is transmitted and received on the RX pin.
The TX pin provides the shift clock for both transmit and receive. The MCU must be the master since it generates
the shift clock for transmission in both directions (see the interconnect diagram in Figure 18.2).
Eight data bits are transmitted/received, LSB first (see the timing diagram in Figure 18.3). Data transmission begins
when an instruction writes a data byte to the SBUF register. The TI Transmit Interrupt Flag (SCON.1) is set at the
end of the eighth bit time. Data reception begins when the REN Receive Enable bit (SCON.4) is set to logic 1 and
the RI Receive Interrupt Flag (SCON.0) is cleared. One cycle after the eighth bit is shifted in, the RI flag is set and
reception stops until software clears the RI bit. An interrupt will occur if enabled when either TI or RI are set.
The Mode 0 baud rate is the system clock frequency divided by one or twelve. RX is forced to open-drain in mode
0, and an external pull-up will typically be required.
Figure 18.2. UART Mode 0 Interconnect
Figure 18.3. UART Mode 0 Timing Diagram
Shift
Reg.
CLK
C8051Fxxx
RX
TX
DATA
8 Extra Outputs
D1
D0
D2
D3
D4
D5
D6
D7
RX (data out)
MODE 0 TRANSMIT
D0
MODE 0 RECEIVE
RX (data in)
D1
D2
D3
D4
D5
D6
D7
TX (clk out)
TX (clk out)
相關(guān)PDF資料
PDF描述
C8051F007 25 MIPS,32k Flash,2.25k Ram,12bit ADC,32 Pin MCU(25 MIPS,32k 閃速存儲器,2.25k Ram,12位 ADC,32 腳 MCU)
C8051F010 20 MIPS,32k Flash,256 Ram,10bit ADC,64 Pin MCU(20 MIPS,32k 閃速存儲器,256 Ram,10位 ADC,64 腳 MCU)
C8051F015 25 MIPS,32k Flash,2.25k Ram,10bit ADC,64 Pin MCU(25 MIPS,32k 閃速存儲器,2.25k Ram,10位 ADC,64 腳 MCU)
C8051F016 25 MIPS,32k Flash,2.25k Ram,10bit ADC,48 Pin MCU(25 MIPS,32k 閃速存儲器,2.25k Ram,10位 ADC,48 腳 MCU)
C8051F022 25 MIPS,64k Flash,4.25k Ram,10bit ADC,100 Pin MCU(25 MIPS,64k 閃速存儲器,4.25k Ram,10位 ADC,100 腳 MCU)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
C8051F006-GQ 功能描述:8位微控制器 -MCU 32KB 12ADC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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
C8051F006-GQR 功能描述:8位微控制器 -MCU 32KB 12ADC 48Pin MCU Tape and Reel RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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
C8051F006R 功能描述:8位微控制器 -MCU C +-12Bit 48Pin RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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
C8051F007 功能描述:8位微控制器 -MCU 32KB 12ADC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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
C8051F007-GQ 功能描述:8位微控制器 -MCU 32KB 12ADC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) 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