Hi Andy,
Unable to start the boot loader of P89v51RD2
I have the following setup
FM Version ver 3.43.183 8051/XA Driver Version 2.26.181, Serial 9600Bd, COM1
P89V51RD2 (new, vergin chip)
11.0592MHz Xtal (oscillating - check by CRO)
RST circuit using 74HC125 as per application notes
ALE /PROG - 33k pullup
/PSEN - 33k pullup
/EA = Vdd
DTR -- RST T1 = 50mS
RST -- Not used
Using a CRO I measured
a. DTR -- RST correct ~ 50mS
b. Delay between deaserted RST and 'U' transmission 400mS
Comment
It would seem the b. delay is too long and not setable in FM.
OTHER TEST
In terminal mode - if I hold down the 'U' char theb POR - 'U' characters start to echo from from the P89v51R2 confirming entry in to bootloader mode and TxD working.
Are there any other options I should set to reduce the delay between RST to 'U' transmision? OR does FM need and update?
Joe :D
Hi Andy ,
I Changed Xtal to 3.579MHz.... (and baud rate 9600Bd)..... so the 400mS delay in FM would be less crictical.
It works.... I can activate the bootloader and read the device type etc.
So it would seem the time delay (b. in my previous post) is a little too long in Flashmagic.
Regards
Joe :)
Thanks. I have another report of this problem from phonoplug and I will look into it shortly.
Andy
This was broken in version 3.39, but is fixed in version 3.46 - just uploaded. Thanks for letting me know!
Andy