参数资料
型号: DSPIC33FJ256MC510T-I/PT
厂商: Microchip Technology
文件页数: 80/136页
文件大小: 0K
描述: IC DSPIC MCU/DSP 256K 100TQFP
产品培训模块: Asynchronous Stimulus
标准包装: 1,200
系列: dsPIC™ 33F
核心处理器: dsPIC
芯体尺寸: 16-位
速度: 40 MIP
连通性: CAN,I²C,IrDA,LIN,SPI,UART/USART
外围设备: 欠压检测/复位,DMA,电机控制 PWM,QEI,POR,PWM,WDT
输入/输出数: 85
程序存储器容量: 256KB(256K x 8)
程序存储器类型: 闪存
RAM 容量: 16K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 3.6 V
数据转换器: A/D 24x10b/12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 100-TQFP
包装: 带卷 (TR)
配用: MA330013-ND - MODULE PLUG-IN DSPIC33 100TQFP
DV164033-ND - KIT START EXPLORER 16 MPLAB ICD2
DM240001-ND - BOARD DEMO PIC24/DSPIC33/PIC32
48
4235K–8051–05/08
AT89C51RD2/ED2
14. Serial I/O Port
The serial I/O port in the AT89C51RD2/ED2 is compatible with the serial I/O port in the 80C52.
It provides both synchronous and asynchronous communication modes. It operates as a Univer-
sal Asynchronous Receiver and Transmitter (UART) in three full-duplex modes (Modes 1, 2 and
3). Asynchronous transmission and reception can occur simultaneously and at different baud
rates
Serial I/O port includes the following enhancements:
Framing error detection
Automatic address recognition
14.1
Framing Error Detection
Framing bit error detection is provided for the three asynchronous modes (modes 1, 2 and 3). To
enable the framing bit error detection feature, set SMOD0 bit in PCON register (See Figure 14-
Figure 14-1. Framing Error Block Diagram
When this feature is enabled, the receiver checks each incoming data frame for a valid stop bit.
An invalid stop bit may result from noise on the serial lines or from simultaneous transmission by
two CPUs. If a valid stop bit is not found, the Framing Error bit (FE) in SCON register (See Table
14-4.) bit is set.
Software may examine FE bit after each reception to check for data errors. Once set, only soft-
ware or a reset can clear FE bit. Subsequently received frames with valid stop bits cannot clear
FE bit. When FE feature is enabled, RI rises on stop bit instead of the last data bit (See Figure
Figure 14-2. UART Timings in Mode 1
RI
TI
RB8
TB8
REN
SM2
SM1
SM0/FE
IDL
PD
GF0
GF1
POF
-
SMOD0
SMOD1
To UART framing error control
SM0 to UART mode control (SMOD0 = 0)
Set FE bit if stop bit is 0 (framing error) (SMOD0 = 1)
SCON (98h)
PCON (87h)
Data byte
RI
SMOD0=X
Stop
bit
Start
bit
RXD
D7
D6
D5
D4
D3
D2
D1
D0
FE
SMOD0=1
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