Найдено 5 результатов
- Пт дек 20, 2013 1:31 pm
- Форум: General
- Тема: Need parallel programmer for AT89C51RD2
- Ответы: 7
- Просмотры: 36011
Re: Need parallel programmer for AT89C51RD2
Hi Ezo, thank you very much for your time and patience. My main problem is that the chip is not going into bootloader mode with the hardware conditions (ALE=floating, /EA=vcc, /PSEN=low during RST lower edge). So, I assume there is some lock bit preventing the chip from entering bootloader. If I cou...
- Чт дек 19, 2013 3:52 am
- Форум: General
- Тема: Need parallel programmer for AT89C51RD2
- Ответы: 7
- Просмотры: 36011
Re: Need parallel programmer for AT89C51RD2
Thanks for the info, Ezo! However, I found this on AT89C51RC datasheet today: "Chip Erase Sequence: Before the AT89C51RC can be reprogrammed, a Chip Erase operation needs to be performed. To erase the contents of the AT89C51RC, follow this sequence: 1. Raise VCC to 6.5V. 2. Pulse ALE/PROG once (dura...
- Ср дек 18, 2013 1:45 am
- Форум: General
- Тема: Need parallel programmer for AT89C51RD2
- Ответы: 7
- Просмотры: 36011
Re: Need parallel programmer for AT89C51RD2
Ezo, just a last question, please: all I need is to erase the lock bit on some AT89C51RD2 chips I have. After the lock bit is clear, I can reprogram them using a serial connection. So, do you think a Willem 3.1, with software 0.97ja can at least clear the lock bit of a AT89C51RD2? Or do you know any...
- Вт дек 17, 2013 12:28 am
- Форум: General
- Тема: Need parallel programmer for AT89C51RD2
- Ответы: 7
- Просмотры: 36011
Re: Need parallel programmer for AT89C51RD2
Oh, this is sad.. Thanks for the reply anyway!
Eduardo
Eduardo
- Пн дек 16, 2013 5:12 pm
- Форум: General
- Тема: Need parallel programmer for AT89C51RD2
- Ответы: 7
- Просмотры: 36011
Need parallel programmer for AT89C51RD2
Please, what is the simplest parallel programmer that works with AT89C51RD2? I have a Willem 3.1, but it seems the latest software version (0.97ja) doesn't support this part. Normally, the AT89C51RD2 can be programmed by RS232 ISP using the built-in bootloader, but I have some chips with the bootloa...