Function : Through instruction restores the normal brush can not write ROM program ; Scope : ROM program inserts inside the main chip MCU Series hard drive ( no hard eight feet ROM chip circuit board ) ; Principle: Short drive circuit board CPU specific pin , using the command line specific programs ( not the data lines ) to the hard drive circuit board CPU sends activation commands and ROM data , so that the CPU ROM program work hard to regain control How to use: install : NET4.0, 13XX series circuit board circuit board E112 point increase in voltage of 3.3V ( orange line can connect the PC power supply 3.3V over ) then repair the ST COM line , then the hard drive power ( not connected to the data line ) : running the U command , select the COM port calls, following the SSS is the connection is successful, election documents, writing brush , it's that simple Shorting method 1537 and 1590 E61 and P2 1444 requires shorting P13 and P14 13xx is connected E41 E112 15XX above then E61 and P2 13XX E112 connected 3.3V High 14441552 ground like P14 P15 E41 E112 access 1537 1590 E61 pick P2 1552 E15 and E27 In fact, the meaning and the same idea to connect the external ROM is to make the circuit board from the external ROM boot but external ROM and no case will enter the COM channel WD directive requires special brush to write a COM command line , RX TX Interface Connection: hard drive circuit board upward , downward plate body , jumpers at a total of eight needles , the middle two in a row following the information line . |