external eeprom burning in 8051

Hi,

I want to interface my microcontroller with external EEPROM and SRAM I have circuit diagram similar like this one
NOT EXACTLY as my book have little difference in circuit


and the circuit with only sram is like this



I think that there will no much problem when interfacing with external RAM

but I have doubt on the EEPROM I go through some texts on the net saying like this "EEPROM burned and then connected to the board".

so
If I configure my 8051 circuit for only external ROM and not to touch its internal ROM then will the programmer program the external EEPROM ?

or I really need some ROM,EEPROM burning devices

From what you are saying the EEProm will work as the program memory, so it has to be first programmed – externally – and then it can be used in the crcuit (ZIF, IC socket ..) ..

:wink:
IanP

actually there is not as it is written
but a 5$ eeprom burner thread on the net

$5 EEPROM programmer - HomemadeTurbo - DIY Turbo Forum
and in my system I don't have such port. and ft232 is much expensive.


And from that thread I got idea of that I may need a separate burner.


but

I Read in my text book and there is written that "the main advantage of EEPROM is that one can program and erase its content while it is still in the system board.It does not require an external erasure and programming device.TO utilize EEPROM fully,the designer must incorporate the circuitry to program the EEPROM into system board."


but still there is one Question
can I program using my ROM through microcontroller using USB.
because my programmer have ATMEGA 8 in which input is an USB and output is like serial(MOSI ... etc)

if I make arrangement to write data to fill up the ROM then I will at most write 8K of data to my external ROM of 64K [ if this too can be possible then I will be happy]

I have AT28C64 EEPROM.
and this is my board which is on development



In my arrangement at present
10K array resistor that can be removed from P0 port
EA pin that can be ground and can be Vcc


so I need to know about eeprom programming stuffs.


thanks,