参数资料
型号: T89C5115-TDSIM
厂商: Atmel
文件页数: 62/113页
文件大小: 0K
描述: IC 8051 MCU FLASH 16K 24SOIC
标准包装: 31
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 20
程序存储器容量: 16KB(16K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 512 x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 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: 24-SOIC(0.295",7.50mm 宽)
包装: 管件
52
AT89C5115
4128G–8051–02/08
Registers
Table 32. SCON Register
SCON (S:98h)
Serial Control Register
Reset Value = 0000 0000b
bit addressable
7
6
5
4
3
2
1
0
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.
6
SM0
Serial port Mode bit 0 (SMOD0 = 0)
Refer to SM1 for serial port mode selection.
SM1
Serial port Mode bit 1
SM0 SM1
Mode
Baud Rate
0
Shift Register FXTAL/12 (or FXTAL/6 in mode X2)
0
1
8-bit UART
Variable
1
0
9bit UART
F
XTAL/64 or FXTAL/32
1
9bit UART
Variable
5
SM2
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.
4
REN
Reception Enable bit
Clear to disable serial reception.
Set to enable serial reception.
3
TB8
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.
2
RB8
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.
1
TI
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.
0
RI
Receive Interrupt Flag
Clear to acknowledge interrupt.
Set by hardware at the end of the 8th bit time in mode 0, See Figure 22. and
Figure 23. in the other modes.
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