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...
What would be the functional difference in using an LV-series versus a HC/HCT-series IC, other than low voltage in the LV case? After checking this with what...
1. In your case you have a working circuit to compare -- then why not use the same parts / families. You could refer to the Philips App Note -- Interfacing 3V...
In reality, I have used the same part families. My board uses a MAX3223 instead of a MAX3221 (since the 3221 is not available as a DIP). The only other...
Hi This may be a red herring, but we have had problems in the past with RS232 chips when the charge pump capacitors are too small. I think it was the Maxim...
Yes exactly right. We have also faced such problem with MAX3221. First we are using with P89LPC932 at that time we are using 100nF Capacitor but after release...
A checklist just to make sure: 1. FlashMagic settings : Options - Advanced Options -- Hardware config - Use RTS........ 2. Jumpers inserted for 'PROG' not...
Everything you said is correct and setup that way. Just having a hard time understanding #4. What do you mean by having 3v3 selected after the transistor? ...
I think he's asking if the transistor is working (turning Off and On for the required pwr sequence) and if 3.3V is being supplied via the transistor to the uC....
Check voltage at LPC, after the transistor has been driven ON by the '02. You could have the transistor dropping more than 0.2V(Vce), preventing proper...
Hello, which commands are required in ICP mode to read the flash memory (code memory) of an LPC921? Unfortunately, there is no example in the ICP specs. ...
Hi there, I'm having problems putting the LPC into the total power-down mode when using a boud rate of 9600 for the UART interface. The courious thing is that...
Hi Im a beginer in this. Im from Slovenia so my language is not so good, and i have a question how to connect and program 4X20 LCD to LPC936, and ho to write a...
Hi All and NXP App's, I am doing a development with a LPC925 that will be the ISP to ICP bridge. I would like to modify the latest (ver 1.7) Bridge code so I...
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...
... My fault: this is not true. I just checked the esacademy code generator, and the code is correct now. Maybe I downloaded the UART0 code and then modified...
I found out another problem with using LPC952 serial port 1: the interrupt enable bit is IEN2.2 and the IEN2 SFR address is D5H. (This is correct, as in the...
... No, my fault again... the bug is in the Esacademy code architect that generates an ANL instead of a ORL with the bitmask. I was so "fused" after many hours...
I have just purchased a Keil EPM900 emulator. After installing the uVision software, I am unable to use the help system. I was told to update the software to...
Using a P89LPC932, 3, 4, or 5, when Timer 1 overflow (Timer 1 in Mode 2) is used as the source for I2C SCL (CRSEL = 1), TH1 determines I2C SCL rate. I have...
Hello, I am starting a small project on LPC932. There seems to be quite a few toolchain options out there: Keil Rigel Raisonance IAR SDCC (open-source) Which...
Hi, there are two options from Keil. A free 4k version called LPC-Studio and a low cost 16k version for NXP LPC900 only. This version can be found here:...
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...
Dear John, I had a look at the LPC2_ISP_8K_V04.a51, and it is the F0 flag in PSW. You are right that the IAP function returns error when the Carry Flag is set,...
I don't believe that F0 is the PSW flag bit since I can't find a definition (like: F0 EQU D0) in the file. This would mean the assembler would interpret it as...
Dear John, FO bit is PSW only. You can also look at header(.h) file or include(.inc) file In LPC9xx.h ---> sbit F0 = PSW^5; In LPC9xx.INC ---> F0 BIT...
I did not include either of those header files. In fact, the 'LPC2_ISP_8K_V04.a51' compiles without adding any other files to the project. I compiled...
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