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(抱歉)张贴到错误的论坛。我打算在微控制器中张贴。)我需要把我的18LF1320编程成一个电路,其中包括不能容忍超过3.6伏特的组件(RN1471)。不幸的是,18LF1320不批量擦除可靠低于4.5伏特,根据编程规范。我处于早期开发阶段,所以会有大量的擦除/程序循环一段时间。我目前正在使用一个带有MPLAB的ICD-3来进行编程。我听说一行擦除可以降低到2伏特,但我看不出有什么办法让ICD-3使用行擦除当编程。是否有另一种编程设备,我可以购买,可以强制使用行擦除?或者有办法让ICD-3做它吗?请不要建议二极管或跳线在我的PIC和电路的其余部分之间。有太多的互连,这是实际的,我想保持总电路面积尽可能小。
以上来自于百度翻译 以下为原文 (Sorry - posted to the wrong forum. I meant to post in Microcontrollers.) I need to program my 18LF1320 in a circuit that includes components (a RN4871) that cannot tolerate more than 3.6 volts. Unfortunately the 18LF1320 does not bulk erase reliably below 4.5 volts, according to the programming specs. I am at the early development stage, so there will be lots of erase/program cycles for a while. I am currently using an ICD-3 with MPLAB to do the programming. I have heard that a Row Erase can be done down to 2.0 volts, but I don't see any way to make the ICD-3 use Row Erase when programming. Is there another programming device I can buy that can be forced to use Row Erase? Or is there a way to make the ICD-3 do it? Please do not suggest diodes or jumpers between my PIC and the rest of the circuit. There are too many interconnections for that to be practical, and I want to keep the total circuit area as small as possible. |
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5个回答
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Athtp://www. McCHIP.COM/FUMMS/M1009104.ASPX
以上来自于百度翻译 以下为原文 Continued at http://www.microchip.com/forums/m1009104.aspx |
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NSDSP可以做到这一点:HTTP://www. NurthnCalas.COM/DEV/PIC18LF/PIC18LF1320.HTMLROWN向下到“低于4.5V的目标电压”。注意,如果该设备是代码保护的,它将不起作用。
以上来自于百度翻译 以下为原文 NSDSP can do it: http://www.northernsoftware.com/dev/pic18lf/pic18lf1320.htm Scroll down to "Target voltage below 4.5V". Note that it won't work if the device is code protected - removing protection requires bulk erase. |
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在我的账户上发生了一些错误,所以我几乎无法发布任何东西。只想添加一个注释——NSDSPIS LVP。
以上来自于百度翻译 以下为原文 Something really wrong happened to my account so I hardly can post anything. Wanted to add a note - NSDSP is LVP only. |
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嗯,真是太糟糕了!我一直在避免LVP像瘟疫一样,基于我在LVP启用时听到的关于意外编程的警告。
以上来自于百度翻译 以下为原文 Well, that is a real bummer! I have been avoiding LVP like the plague, based on the warnings I have heard about accidental programming when LVP is enabled. |
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毫无根据的有一些古老的图片(如你的)与PGM针。这些图片要求PGM引脚在启用LVP时接地。然而,其中一些有勘误表,PGM引脚必须接地甚至LVP禁用。IMPO,PGM PIN不是一个好主意,因为一个不同的原因-你并不真的想要牺牲一个引脚没有好的理由。但现代PICS(任何小于约10岁)没有PGM针。
以上来自于百度翻译 以下为原文 Unfounded. There are some ancient PICs (like yours) with a PGM pin. These PICs require that the PGM pin be grounded when LVP is enabled. However, some of them have errata and the PGM pin has to be grounded even with LVP disabled. IMHO, PGM pin isn't a good idea because of a different reason - you don't really want to sacrifice a pin without good reason. But modern PICs (anything less than about 10 years old) don't have the PGM pin. |
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