01.Basic Question
  • Q. What kinds of universal writers can support Megawin 8051 IC ? (Hits:910)
    Universal Writer Support Web-site List:Please refer to Writer-maker web-site to check programmer type supported Megawin 8051 MCU in detail.




  • Q. What is Frame Error Detection? (Hits:326)

    Frame Error Detection:

    UART will begin with a “Low Bit” before transmitting the data (8 bits) and then end up with a “High bit”.

    The wavy curve as below:




    When Frame Error Bit (FE) is enabled by setting the SMOD0 (PCON.6) as 1, the receiver will detect an invalid stop bit, If the stop bit doesn’t indicate High, the EF will be set to 1. By the way, the EF will be kept as 1 unless it is reset as 0 by software.

  • Q. What is 3-Level protection ? (Hits:439)

    Lock, Scramble, MOVC Disable.

    Lock: When LOCK is enabled, MCU will be locked, which means any writer can’t read information form the MCU,The only way which you can do is Whole Chip Erase.

    Scramble: When SB is enabled, the data in MCU will be scrambled. Even though the writer can read data from MCU, the data will be indiscriminate.

    MOVC disable: When MOVCL is enabled, user will get empty value by using MOVC to read code, enable MOVCL can prevent your source code from being copied.