參數(shù)資料
型號: AT89C51ID2-SLRUM
廠商: Atmel
文件頁數(shù): 111/157頁
文件大?。?/td> 0K
描述: IC 8051 MCU 64K FLASH 44-PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標準包裝: 500
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 閃存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 標準包裝
其它名稱: AT89C51ID2-SLRUMDKR
57
AT89C51ID2
4289C–8051–11/05
Table 38. SCON Register
SCON - Serial Control Register (98h)
Reset Value = 0000 0000b
Bit addressable
76
543
210
FE/SM0
SM1
SM2
REN
TB8
RB8
TI
RI
Bit
Number
Bit
Mnemonic
Description
7
FE
Framing Error bit (SMOD0=1
)
Clear to reset the error state, not cleared by a valid stop bit.
Set by hardware when an invalid stop bit is detected.
SMOD0 must be set to enable access to the FE bit.
SM0
Serial port Mode bit 0
Refer to SM1 for serial port mode selection.
SMOD0 must be cleared to enable access to the SM0 bit.
6SM1
Serial port Mode bit 1
SM0
SM1
Mode
Baud Rate
0
Shift Register F
XTAL/12 (or FXTAL /6 in mode X2)
0
1
8-bit UART
Variable
1
0
9-bit UART
F
XTAL/64 or FXTAL/32
1
9-bit UART
Variable
5SM2
Serial port Mode 2 bit / Multiprocessor Communication Enable bit
Clear to disable multiprocessor communication feature.
Set to enable multiprocessor communication feature in mode 2 and 3, and
eventually mode 1.This bit should be cleared in mode 0.
4REN
Reception Enable bit
Clear to disable serial reception.
Set to enable serial reception.
3TB8
Transmitter Bit 8 / Ninth bit to transmit in modes 2 and 3
Clear to transmit a logic 0 in the 9th bit.
Set to transmit a logic 1 in the 9th bit.
2RB8
Receiver Bit 8 / Ninth bit received in modes 2 and 3
Cleared by hardware if 9th bit received is a logic 0.
Set by hardware if 9th bit received is a logic 1.
In mode 1, if SM2 = 0, RB8 is the received stop bit. In mode 0 RB8 is not
used.
1TI
Transmit Interrupt flag
Clear to acknowledge interrupt.
Set by hardware at the end of the 8th bit time in mode 0 or at the beginning
of the stop bit in the other modes.
0RI
Receive Interrupt flag
Clear to acknowledge interrupt.
Set by hardware at the end of the 8th bit time in mode 0, see Figure 21.
and Figure 22. in the other modes.
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