8-bit Microcontrollers中的主题 HC705J1A bootloader programming cct needed https://community.nxp.com/t5/8-bit-Microcontrollers/HC705J1A-bootloader-programming-cct-needed/m-p/345780#M21082 <HTML><HEAD></HEAD><BODY><P>Hi all. Doing an upgrade for a good customer to some boards I made for him way back in the late 90's using HC705J1A OTP micros. Luckily I still have a few of them. I remember that there is a method of programming them where you could put your code in a small eprom, strap it to the micro, power it up and the code would be copied over and away you go. Obviously not the way you would do it in a production environment but quite okay for doing just a few. </P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Does anyone still have a circuit for this, and any necessary instructions?</P><P>I don't want any PC connected setup, just a micro, eprom and a handful of connections between the two.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Regards,</P><P>JD</P></BODY></HTML> Sun, 07 Sep 2014 11:32:18 GMT JimDandy 2014-09-07T11:32:18Z HC705J1A bootloader programming cct needed https://community.nxp.com/t5/8-bit-Microcontrollers/HC705J1A-bootloader-programming-cct-needed/m-p/345780#M21082 <HTML><HEAD></HEAD><BODY><P>Hi all. Doing an upgrade for a good customer to some boards I made for him way back in the late 90's using HC705J1A OTP micros. Luckily I still have a few of them. I remember that there is a method of programming them where you could put your code in a small eprom, strap it to the micro, power it up and the code would be copied over and away you go. Obviously not the way you would do it in a production environment but quite okay for doing just a few. </P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Does anyone still have a circuit for this, and any necessary instructions?</P><P>I don't want any PC connected setup, just a micro, eprom and a handful of connections between the two.</P><P style="min-height: 8pt; padding: 0px;">&nbsp;</P><P>Regards,</P><P>JD</P></BODY></HTML> Sun, 07 Sep 2014 11:32:18 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/HC705J1A-bootloader-programming-cct-needed/m-p/345780#M21082 JimDandy 2014-09-07T11:32:18Z