8-bit Microcontrollers中的主题 Re: MC68705R3 erase https://community.nxp.com/t5/8-bit-Microcontrollers/MC68705R3-erase/m-p/215114#M18638 <HTML><HEAD></HEAD><BODY><P>Hello and welcome to the fora, kamilica.</P><P>Presumably the windowed ones are also ceramic with a quartz glass window. This is expensive to manufacture (buy) especially when most devices will only ever be programmed once. Because of this they come up with "OTP" One Time Programmable devices which are the same inside but just molded in plastic. If you need to re-programme these, you throw it away and use a new one.</P><P>This is probably what you have. If you don't want what is programmed into them now they are worthless.</P><P>&nbsp;</P></BODY></HTML> Thu, 10 Sep 2009 05:16:10 GMT peg 2009-09-10T05:16:10Z MC68705R3 erase https://community.nxp.com/t5/8-bit-Microcontrollers/MC68705R3-erase/m-p/215113#M18637 <HTML><HEAD></HEAD><BODY><SPAN>Hi I am looking for solution to erase MC68705R3 chip. I have some with window on&nbsp;and they are UV erasable, but majority of them are without.</SPAN></BODY></HTML> Thu, 10 Sep 2009 00:26:30 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/MC68705R3-erase/m-p/215113#M18637 kamilica 2009-09-10T00:26:30Z Re: MC68705R3 erase https://community.nxp.com/t5/8-bit-Microcontrollers/MC68705R3-erase/m-p/215114#M18638 <HTML><HEAD></HEAD><BODY><P>Hello and welcome to the fora, kamilica.</P><P>Presumably the windowed ones are also ceramic with a quartz glass window. This is expensive to manufacture (buy) especially when most devices will only ever be programmed once. Because of this they come up with "OTP" One Time Programmable devices which are the same inside but just molded in plastic. If you need to re-programme these, you throw it away and use a new one.</P><P>This is probably what you have. If you don't want what is programmed into them now they are worthless.</P><P>&nbsp;</P></BODY></HTML> Thu, 10 Sep 2009 05:16:10 GMT https://community.nxp.com/t5/8-bit-Microcontrollers/MC68705R3-erase/m-p/215114#M18638 peg 2009-09-10T05:16:10Z