参数资料
型号: MC68HC705PD6
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封装: QFP-80
文件页数: 16/165页
文件大小: 841K
代理商: MC68HC705PD6
GENERAL RELEASE SPECIFICATION
July 7, 1997
MOTOROLA
SERIAL COMMUNICATIONS INTERFACE
MC68HC05PD6
11-10
REV 1.1
11.9.4 Serial Communications Status Register (SCSR)
The serial communications status register (SCSR) provides inputs to the interrupt
logic circuits for generation of the SCI system interrupt. In addition, a noise ag bit
and a framing error bit are also contained in the SCSR.
TDRE
The transmit data register empty bit is set to indicate that the contents of the
serial communications data register have been transferred to the transmit serial
shift register. If the TDRE bit is clear, it indicates that the transfer has not yet
occurred and a write to the serial communications data register will overwrite
the previous value. The TDRE bit is cleared by accessing the serial
communications status register (with TDRE set), followed by writing to the
serial communications data register. Data can not be transmitted unless the
serial communications status register is accessed before writing to the serial
communications data register to clear the TDRE ag bit. Reset sets the TDRE
bit.
TC
The transmit complete bit is set at the end of a data frame, preamble, or break
condition if:
1.
TE = 1, TDRE = 1, and no pending data, preamble, or break is to be
transmitted; or
2.
TE = 0, and the data, preamble, or break (in the transmit shift register)
has been transmitted.
The TC bit is a status ag which indicates that one of the above conditions has
occurred. The TC bit is cleared by accessing the serial communications status
register (with TC set), followed by writing to the serial communications data
register. It does not inhibit the transmitter function in any way. Reset sets the TC
bit.
RDRF
When the receive data register full bit is set, it indicates that the receiver serial
shift register is transferred to the serial communications data register. If multiple
errors are detected in any one received word, the NF, FE, and RDRF bits will be
affected as appropriate during the same clock cycle. The RDRF bit is cleared
when the serial communications status register is accessed (with RDRF set)
followed by a read of the serial communications data register. Reset clears the
RDRF bit.
1
7
100000
-
6543210
W
R
SCSR
$000D
reset
TDRE
TC
RDRF
IDLE
OR
NF
FE
相关PDF资料
PDF描述
MC68HC05PE0P 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC05PE0CDW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC05PL4CSD 8-BIT, MROM, 2.56 MHz, MICROCONTROLLER, PDSO28
MC68HC705PL4BDW 8-BIT, OTPROM, 2.56 MHz, MICROCONTROLLER, PDSO28
MC68HC705PL4BCDW 8-BIT, OTPROM, 2.56 MHz, MICROCONTROLLER, PDSO28
相关代理商/技术参数
参数描述
MC68HC705SR3CP 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-DIP RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C,IrDA,LIN,SPI,UART/USART 外围设备:DMA,PDR,POR,PVD,PWM,温度传感器,WDT 输入/输出数:26 程序存储器容量:64KB(64K x 8) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN,36-VFQFPN 包装:托盘 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名称:497-9032STM32F101T8U6-ND
MC68HC705SR3CPE 功能描述:8位微控制器 -MCU 8B MCU 192 BYTES RAM 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
MC68HC705SR3CPE 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC
MC68HC705SR3PE 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-DIP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC05 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,SPI,UART/USART 外围设备:欠压检测/复位,POR,PWM,WDT 输入/输出数:32 程序存储器容量:32KB(16K x 16) 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT
MC68HC706P6ACDW 制造商:Motorola Inc 功能描述: