... I think the parallel port of the PC has pull-up resistor that can influence the reading. Please use a bidirectional transceiver like 74hc245 to force the...
It dose have pull-up on the PDA line, because I use open-drain inverter 74HC05, connection diagram is similiar to the parallel port-iic adapter(you can find it...
Circuit is OK. If you are sure that all timings are respected then the CPU doesn't work. In particular mode check that tVR time (RST delay from VDD active) is ...
Hello, I tried to configure all P5.x pins as open drain outputs, setting both P5M1 and P5M2 to 0xFFH. My target application has this kind of circuit attached...
In any case you probably should add a pullup to 5v to handle any leakage that will occur. You can calculate how much leakage you have by measuring the voltage...
... Does anyone knows if such a circuit would also be ok for the LPC901? In any case please report if it works, that would be interesting to know. Cheers, ...
Hi, it's been a while since I was dealing with the LPC900 but this is what I remember: ICP is possible with all LPC900 devices, including the LPC901. IAP is...
ISP Lite is possible with All LPC900.. Regards, Nilesh (09925049517) ... From: lpc2100_fan <lpc2100_fan@...> ...
I am using keil's START900. Anybody know the right settings for this assembly program? I know it is a lot to ask. Thank you. ALvin... APSTRON P.O. Box 10336 ...
Hello, I'm a new LPC935 user and for my first application, my microcontroller BUG, where is the problem??? (Sorry for my bad English, I've some difficulties...
... You forget to set the pin 2.3 as output pin: you must reset P2M1.3 and set P2M2.3 bits respectively. At reset the pins are all set as inputs. I suggest you...
i'm first time to used this chip, i just write simple program to blink LED from keil example. It not working, i have testing using keil simulator and it...
Hi all, (new member here...) out of curiousity I had a look at the source code of ISP to ICP bridge v16, available in the files section of this group. It's a...
i want accurate timing so i used external crystal of 8MHZ with LPC936 but i found the following problems. 1.With crystal (8MHZ) & its capacitor value 33pf or...
Do not use AUXR1.... cuase it will not help i think... also check the errata sheet of Micocontroller.. Regards, Nilesh (09925049517)Â Potent embedded...
Try a solid state relay that switches at the zero voltage crossover point. I made my own and it stopped noise getting from the relay (mechanical) to the...
I am using the LPC936 as well with 7.328MHz crystals. I have had the same problem in three different projects therefore I doubt it has anything to do with...
which pin have you used ? Regards, Nilesh (09925049517) Potent embedded solutions  ... From: gogainet <gogainet@...> Subject: [lpc900_users] Re: new...
Which programmer are you using?? and while programming the device have you set the boot location to 0x0000H? Pls check, I faced similar problem. By default in...
I will say use ICP Programming Method... Many Commercial and low cost programmers available... Regards, Nilesh (09925049517)Â Â ... From: navneet_copper...
i'm using universal programmer. the compiler i using is keil, in the example there are start900.a51, and i have disable the ISP entry during power up?, that is...
i'm using Parallel method with hi-lo system programmer. i have the ICP proggrammer but i not yet try it. ... programming ... <gsembox- ... program ... ...
can you send me your software ??? Regards, Nilesh (09925049517)Â Â ... From: gogainet <gogainet@...> Subject: [lpc900_users] Re: new LPC925 user-haw to...
this example program from keil. #include <REG925.H> // register definition void delay (unsigned int cnt) { while (--cnt); } void main() { unsigned char i; ...
Hello folks, Anyone of you ever tried to succesfully "talk" to an SPI device like a flash memory or a RTC(?) I tried Code architect but in vain :( Plz any code...
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