参数资料
型号: MC68L11D0FNE2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 2 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 105/138页
文件大小: 1047K
代理商: MC68L11D0FNE2
SCI Error Detection
MC68HC711D3 Data Sheet, Rev. 2.1
Freescale Semiconductor
69
6.6 SCI Error Detection
Three error conditions can occur during generation of SCI system interrupts:
Serial communications data register (SCDR) overrun
Received bit noise
Framing
Three bits (OR, NF, and FE) in the serial communications status register (SCSR) indicate if one of these
error conditions exists. The overrun error (OR) bit is set when the next byte is ready to be transferred from
the receive shift register to the SCDR and the SCDR is already full (RDRF bit is set). When an overrun
error occurs, the data that caused the overrun is lost and the data that was already in SCDR is not
disturbed. The OR is cleared when the SCSR is read (with OR set), followed by a read of the SCDR.
The noise flag (NF) bit is set if there is noise on any of the received bits, including the start and stop bits.
The NF bit is not set until the RDRF flag is set. The NF bit is cleared when the SCSR is read (with FE
equal to 1) followed by a read of the SCDR.
When no stop bit is detected in the received data character, the framing error (FE) bit is set. FE is set at
the same time as the RDRF. If the byte received causes both framing and overrun errors, the processor
only recognizes the overrun error. The framing error flag inhibits further transfer of data into the SCDR
until it is cleared. The FE bit is cleared when the SCSR is read (with FE equal to 1) followed by a read of
the SCDR.
6.7 SCI Registers
This subsection describes the five addressable registers in the SCI.
6.7.1 SCI Data Register
The SCI data register (SCDR) is a parallel register that performs two functions. It is the receive data
register when it is read, and the transmit data register when it is written. Reads access the receive data
buffer and writes access the transmit data buffer. Receive and transmit are double buffered.
Address:
$002F
Bit 7
654321
Bit 0
Read:
R7/T7
R6/T6
R5/T5
R4/T4
R3/T3
R2/T2
R1/T1
R0/T0
Write:
Reset:
Unaffected by reset
Figure 6-3. SCI Data Register (SCDR)
相关PDF资料
PDF描述
MC908GR60AVFAR2 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP48
MC908GZ48VFAE 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP48
MC908GZ60CFJE 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP32
MC9S08RE16FGE 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP44
MC9S12C96CPBR2 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP52
相关代理商/技术参数
参数描述
MC68L11E0FN2 制造商:Rochester Electronics LLC 功能描述:8-BIT MCU,512RAM,A/D,LVDC - Bulk
MC68L11E0FNE2 功能描述:IC MCU 8BIT LV 512RAM 52-PLCC RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 标准包装:1 系列:87C 核心处理器:MCS 51 芯体尺寸:8-位 速度:16MHz 连通性:SIO 外围设备:- 输入/输出数:32 程序存储器容量:8KB(8K x 8) 程序存储器类型:OTP EEPROM 大小:- RAM 容量:256 x 8 电压 - 电源 (Vcc/Vdd):4 V ~ 6 V 数据转换器:- 振荡器型:外部 工作温度:0°C ~ 70°C 封装/外壳:44-DIP 包装:管件 其它名称:864285
MC68L11E1CFNE2 功能描述:8位微控制器 -MCU 8B MCU RAM EE A/D LVDC 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
MC68L11E1FNE2 功能描述:8位微控制器 -MCU 8B MCU RAM EE A/D LVD 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
MC68L11F1CFNE3 功能描述:8位微控制器 -MCU 8B MCU 1KRAM 512BYTES 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