Connect the UART on the development board to your PC (you might need an USB to serial RS232 adapter). Use an USB cable to connect your development board to the Host PC and power up your board. The Welcome to the Found New Hardware Wizard appears. Installation of the driver is described in detail in the Abstract.txt file. PC Software

• Full Duplex UART Serial Channel • Low-power Idle and Power-down Modes • Interrupt Recovery from Power-down Mode • Watchdog Timer • Dual Data Pointer • Power-off Flag Description The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using

UART Communication or RS232 serial interfaces are provided by many microcontrollers. The µVision Debugger simulates the UART interface and provides Serial Windows for communication. Serial Windows operate similar to a terminal. As an alternative, serial output can be redirected to any COM port using the ASSIGN command.

the EXT RS232 jack on the MCB251SB to an available serial port on your PC. 2. Connect the supplied transformer to a source of 120 volts AC. Plug the jack from the transformer into socket J1 on the board. The jack is the power switch for the board. Simply remove the jack from the socket to turn the unit off and replace it to power the unit on.

switch is useful when using interrupt-driven serial I/O with the external UART. You must set Uart_INT to ON, if you want to halt execution of a user program within µVision. ext_Uart : Default ON The ext_Uart switch determines whether or not the chip select signal for the external 16550 UART is generated. If ext_Uart is ON, the chip select ...

Connectors RS232, I2C RS232: 4 x 1 UART, either UART0 or UART1, can be connected to the USB Micro B connector (CN1) via jumpers (JP10, JP12, JP13 and JP14). RTS/CTS hardware flow control are supported via USB as well.

The following picture shows an exemplary connection of the development board and an USB CDC ACM Device implemented on another development board. This USB CDC ACM Device is connected to a PC via RS232 to check incoming messages.

The window displays serial output data received from a simulated CPU, while characters typed into a serial window are input to the simulated CPU. This allows testing a UART interface prior to having the target hardware. The Debug (printf) Viewer is a special serial window that can exchange data with the microcontoller.

RS232: 1 x UART-to-USB FTDI bridge for UART interface with ESD protection; Ethernet: 1 x 10/100 Mbps ...

Keil makes C compilers, macro assemblers, real-time kernels, debuggers, simulators, integrated environments, evaluation boards, and emulators for the ARM, XC16x/C16x/ST10, 251, and 8051 microcontroller families.