Extract MCU PIC12C509A Code and copy the extracted file to blank Microcontroller PIC12C509A which will provide the same functions, the file format is binary or heximal after recover MCU content from the memory;
The same majority voting is done to the stop bit as done for the other bits in the frame. If the stop bit is registered to have a logic 0 value, the Frame Error (FEn) Flag will be set when read MCU atmega1284a program.
A new high to low transition indicating the start bit of a new frame can come right after the last of the bits used for majority voting. For Normal Speed mode, the first low level sample can be at point marked (A) .
For Double Speed mode the first low level must be delayed to (B). (C) marks a stop bit of full length. The early start bit detection influences the operational range of the Receiver.
The operational range of the Receiver is dependent on the mismatch between the received bit rate and the internally generated baud rate.
If the Transmitter is sending frames at too fast or too slow bit rates, or the internally generated baud rate of the Receiver does not have a similar (see Table 99) base frequency, the Receiver will not be able to synchronize the frames to the start bit.
The following equations can be used to calculate the ratio of the incoming data rate and internal receiver baud rate. Sum of character size and parity size (D = 5 to 10 bit) Samples per bit. S = 16 for Normal Speed mode and S = 8 for Double Speed mode after read microcontroller atmega640p eeprom.
First sample number used for majority voting. SF = 8 for normal speed and SF = 4 for Double Speed mode. Middle sample number used for majority voting.
SM = 9 for normal speed and
SM = 5 for Double Speed mode.
Rslow is the ratio of the slowest incoming data rate that can be accepted in relation to the receiver baud rate. Rfast is the ratio of the fastest incoming data rate that can be accepted in relation to the receiver baud rate.
Table 99 and Table 100 list the maximum receiver baud rate error that can be tolerated. Note that Normal Speed mode has higher toleration of baud rate variations.
