Hi ALL, I have a simple question. I read P89LPC935 errata sheet. The following is written in it. "To generate a proper Power-On-Reset(POR), VDD must have...
Hi there, ... below ... This is true - a clean POR requires Vdd to have dropped below 0.2V. ... The device is specified to operate from 2.4V to 3.6V, while the...
Dear PM Thank you for your advice. if so I want to know way to restore from 0.2V~2.4V. In the circuit that suppresses current consumption small as much as ...
Hi there, ... The IAP code is protected by a software reset instruction so that a processor walking up through unused code memory will be correctly reset, and...
Hi everyone! I'm using a LPC908 chip and i found problems using the internal RC oscillator. On user manual i can read it is factory-trimmed to 7.372.800 Mhz ...
Hi Everyone This is my "Minimal" source code for the clock problem on LP908 i mentioned. The port p0.4 toggles @ 76uS instead of 69uS as expected Do anyone can...
Hi Furno, I'm using a LPC903 and found the same problem, the formula for calculating the values for BRGR0, BRGR1 says it should be 0x0030 for an 115,200 baud...
no, I haven't, I'm right in the middle of another project but I will try it as soon as I can get back to it. ... TRIM? ... for ... work. ... <gianlucafurno@> ...
I have two chips that I read the TRIM register on. One reads 0xAE and the other reads 0xAD ... TRIM? ... for ... work. ... <gianlucafurno@> ... Mhz ... ...
There doesn't seem to be much info on development tools for this chip - is the LPC9401 dev kit what's needed - again can't find info. Does the Keil compiler...
I am using the 924 as an I2C slave device and am running into a very strange problem!! The 924 will give an ACK to it's own address but immediately after the...
... OK - from the values written you are intending to use the internal I2C bus clock generator BUT you have enabled the T1 overflow as the clock source so the...
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...
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