Hello, I am using a P89c51rd2 based board .I have installed FlashMon on the microcontroller and I am trying to use the Keil software to develop small applications. I can connect to the monitor on my board and type commands like memset, but when trying to load the application it disconnects. While trying to find a solution I found that the memory model of this microcontroller is not compatible with FlashMon, and this because the Philips microcontroler needs to erase every block before writing it. Is this true? And if it is can I use an external Ram to load and debug applications on it?
In the microcontroller's datasheet it says that it supports In Application Programming. Isn't that what the monitor does?
I found this : To achieve “touchless†ISP/IAP it is necessary to tie !EA/Vpp directly to the 5V supply, thus no external code memory can be used. It is also a condition that nothing pulls P2.6 and P2.7 down after reset is applied when the application code is not running. I suggest tying these 2 pins to Vcc through each a 10k resistor as an extra safety. here: www.8052.com/.../notouch.doc
Should I tie !EA/Vpp to the 5v supply?