What's T1 and T2 for LPC9xx ISP hardware entry ?

[shiue]

Hi, everbody

What's T1 and T2 for LPC9xx ISP hardware entry ?
I look for nothing for T1 and T2.

[Andy Ayre]

Go to Options -> Advanced Options -> Hardware Config

T1 and T2 were added for the LPC9xx in Flash Magic version 1.96.

[shiue]

Thanks Andy.

But, I mean that Why add t1 and t2 ?
What relation does the t1 & t2 have with the ISP?

[Andy Ayre]

Section 7.3.2 of the manual shows a simplified timing diagram. Looking at that you can see:

T1 = delay between powering down the device and powering the device back up
T2 = delay between powering up the device and applying the pulses

More capacitance on VDD = longer times needed for T1 and T2.