problem with P89LPC922

Started by goossensd in LPC90010 years ago 6 replies

Hi, I have a problem with programming P89LPC922. I use ISP, i can programm it 1 time then i cannot programm it again. If i change the...

Hi, I have a problem with programming P89LPC922. I use ISP, i can programm it 1 time then i cannot programm it again. If i change the processor, i can programm it 1 time then it's all. The processor doesn't respond on TX. Do you have an idea of what appends? Thanks a lot David


LPC954 info

Started by Fausto Marzoli in LPC90010 years ago 1 reply

Hi all! I need to know the MFGID, ID1 and ID2 for the new LPC954 device. I suppose that MFGID = 15H and ID1 = DDH, but ID2? Is there an...

Hi all! I need to know the MFGID, ID1 and ID2 for the new LPC954 device. I suppose that MFGID = 15H and ID1 = DDH, but ID2? Is there an updated ICP_LPC9xx_v27.pdf (P89LPC900 In-Circuit Programming Specifications) available? On the user manual I read that the P89LPC952/954 program memory consists 1 kB sectors. This is true for LPC952 (8K total flash), but the only other LPC900 devi...


Crystal oscillator doesn't work on P89LPC936

Started by pyalpc936 in LPC90010 years ago 1 reply

Hi, I'm using a P89LPC936 with a 12MHz crystal (SMD case HC49/4H) The uC doesn't always start. It seems that oscillation level is too small...

Hi, I'm using a P89LPC936 with a 12MHz crystal (SMD case HC49/4H) The uC doesn't always start. It seems that oscillation level is too small (0.5V to 1.6V with 3.3V Vdd). Also it seems to work fine with a classic crystal (not SMD). The reason could be that classic crystal have serie resistance (about 10 ohms) much lower then SMD crystal (about 30 ohms). And the 89LPC936 doesn't have enou...


ISP boot code / user-manual discrepancy

Started by john in LPC90011 years ago 7 replies

I noticed that the User manual (UM10116.pdf Rev. 02 ? 9 June 2005) states that the IAP functions return an error when the Carry Flag is set. But...

I noticed that the User manual (UM10116.pdf Rev. 02 ? 9 June 2005) states that the IAP functions return an error when the Carry Flag is set. But the ISP boot code from NXP, LPC2_ISP_8K_V04.a51, is testing the bit F0: JB F0,ERROR ;check if an error occured At first I thought it was the F0 flag in PSW but there is no definition for that so the assembler is reading it as the F0 bit which is...


LPC952 datasheet error (Serial port 1)

Started by Fausto Marzoli in LPC90011 years ago 1 reply

I just found an error in the P89LPC952 User Manual (Rev.00), and also in the reg952.h header file that you can download from the Keil...

I just found an error in the P89LPC952 User Manual (Rev.00), and also in the reg952.h header file that you can download from the Keil website. The error is in the serial port 1 control register: S1CON correct address is B6H, while at pages 55 and 58 it's indicated as B5H. Fortunately you can find it correctly indicated as B6H at page 15. As I said, the error is also in the keil C51 re...


Problems communicating with 89LPC935 on my own circuit (schematic included)

Started by bradziegler in LPC90011 years ago 10 replies

I've been working with a hardware design for my own evaluation board of sorts that has 8 LEDs, a couple of DIP switches, pushbuttons, etc.... ...

I've been working with a hardware design for my own evaluation board of sorts that has 8 LEDs, a couple of DIP switches, pushbuttons, etc.... The circuit is based on the MCB900 schematic, which I got from http://www.keil.com/mcb900/mcb900-schematics.pdf . I used a simple LED flasher program to test whether or not the circuit is working


IAP-lite ?

Started by Fred in LPC90012 years ago 2 replies

Hi. I am using the following code, mostly from the datasheets. I simply want to write a byte in flash. I cannot test this code using my...

Hi. I am using the following code, mostly from the datasheets. I simply want to write a byte in flash. I cannot test this code using my Keil emulator, it is not supported. Now, I have flashed the code on a PLC922, and call this routine. I know that the code doesn't return an error because the PLC922 is resetted. However, the byte is NOT written in flash... Does anybody see something wr...


SPI read action

Started by yen0yuki in LPC90012 years ago 2 replies

Dear ALL, I try to use SPI function with LPC932. Transfer was success. Data is watched on MOSI pin. However, receive was fail. Data is...

Dear ALL, I try to use SPI function with LPC932. Transfer was success. Data is watched on MOSI pin. However, receive was fail. Data is not watched on MISO pin. dummy data is send. source is follow. --- --- // dummy data SPDAT=dat; while(! (SPSTAT & 0x80)) ; SPSTAT |= 0x80; // Wait until the SPIF Flag is on dat=SPDAT; /* debug */ ------


Emulation with EPM900 and 89LPC936 target

Started by pyalpc936 in LPC90012 years ago 1 reply

It seems that the bondout chip on the EPM900 is a 89LPC932. The LPC932 don't have analog fonctions and is code limited. Is there a boundout...

It seems that the bondout chip on the EPM900 is a 89LPC932. The LPC932 don't have analog fonctions and is code limited. Is there a boundout chip for the P89LPC936 ? And where can we find it (distributors ?) Thanks ------------------------ Yahoo! Groups Sponsor --------------------~--> =20 Home is just a click away.=A0 Make Yahoo! your home page now. http://us.click.yahoo.com/DHchtC/3FxN


ISP for P89LPC932 RevC

Started by keil...@yahoo.com.vn in LPC90012 years ago 5 replies

Hi all! I have P89LPC932 Rev C, and I can\'t reprograme using ISP again, I using FlashMagic to load hex file from example Hello to micro, but...

Hi all! I have P89LPC932 Rev C, and I can\'t reprograme using ISP again, I using FlashMagic to load hex file from example Hello to micro, but then, micro can\'t enter ISP again, although I send BootLoader . In example, I see that: BSB=1, BOE=1, RPE=1. Can you give any advice? Thanks before! Family ------------------------ Yahoo! Gr


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