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In-System Programming Support
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LPC9xx/LPC9xxx
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problem prgramming 89lpc938 with keil mcb900
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Topic: problem prgramming 89lpc938 with keil mcb900 (Read 15469 times)
joange
Jr. Member
Posts: 2
problem prgramming 89lpc938 with keil mcb900
«
on:
February 05, 2013, 11:25:08 PM »
Hello guys,once i programmed Lpc 938,it refuses reprogram it again.sometimes I should raise the value of T1 and T2 in hardware config at flash magic situated in advanced options to reprogram it.
could any help.thanks
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Andy Ayre
ESAcademy Staff
Sr. Member
Posts: 2190
Re: problem prgramming 89lpc938 with keil mcb900
«
Reply #1 on:
February 09, 2013, 09:17:18 AM »
For the MCB900 I believe T1 should be around 120 and T2 should be around 240. Changing these numbers is normally only required to overcome capacitances on the signals and power supply.
You need to put a scope on the power and reset pins of the device and verify the ISP entry waveform matches the requirements in the NXP user manual.
Andy
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Embedded Systems Academy, Inc.
support at esacademy dot com
joange
Jr. Member
Posts: 2
Re: problem prgramming 89lpc938 with keil mcb900
«
Reply #2 on:
February 12, 2013, 11:00:44 PM »
Hi Andy thanks for your replay but please I am still lost .do you have the link where I can down load the nxp manual.
thanks
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problem prgramming 89lpc938 with keil mcb900