I read in ( 18Fxx2 DataSheet ) > > > http://ww1.microchip.com/downloads/en/DeviceDoc/39564c.pdf that I can use a Resistor and a...

I read in ( 18Fxx2 DataSheet ) > > > http://ww1.microchip.com/downloads/en/DeviceDoc/39564c.pdf that I can use a Resistor and a Capacitor to clock the 18f452 PIC Page 18 says (including a diagram) : Recommended values:3 k=A6=B8 =A1=DC REXT =A1=DC 100, CEXT > 20pF But there is not place I can find the achieved clocking related to those values. Any clue ? Sebastian.

I am struggling to get the power consumption of sensor device down. According to the datasheet (page 208, top graph), the ATmega8515 I use,...

I am struggling to get the power consumption of sensor device down. According to the datasheet (page 208, top graph), the ATmega8515 I use, uses slightly less than 1mA @ 3.3V and 1MHz internal clock while active. But I measure around 2.3mA. Even when I stop all I/O and go into an endless loop, it still uses 2.1mA. Is Atmel showing off here or am I missing something? Meindert

We need to synchronize clocks (so we can synchronize audio) on physically separated controllers that are connected via ethernet that may or may...

We need to synchronize clocks (so we can synchronize audio) on physically separated controllers that are connected via ethernet that may or may not be connected to the internet. The controllers have ARM9 LPC3250 SOM and embedded Linux. We need to synch with no more than 50 ms difference but preferably less. Synchronization needs to continue working between any two controllers reg

hi, we are trying to run the "Virtex4_PPC_Example_9_1" example program (that came along with the EDK9.1.2 kit) that has TestInterrupt.c routine...

hi, we are trying to run the "Virtex4_PPC_Example_9_1" example program (that came along with the EDK9.1.2 kit) that has TestInterrupt.c routine (timer interrupt driving the LEDs and UART interface displaying the status.) "We are able to see LEDs flashing on the board but not able to speed up or slow down the clock using the 'f' , 's' inputs through the hyperterminal, which we are expecte...

Hi there, a newbie question, and I would be grateful for a response or at least hint where to look(read) for information. My problem is: I...

Hi there, a newbie question, and I would be grateful for a response or at least hint where to look(read) for information. My problem is: I have two synchronisation domains. One device (A) is running at a 2.048 frequency. Then there is a STM32 microcontroller (B) that is using 8 MHz clock source. Dev A gives out NRZ data stream and accept NRZ data stream. I want to send and receive data ...

This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C4D617.32223130 Content-Type:...

This is a multi-part message in MIME format. ------=_NextPart_000_000B_01C4D617.32223130 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable We plan on using a GPS PPS signal that will be used to update the = internal clock on each net burner (one for each application/sensor). One = issue we are currently trying to resolve is how best to handle th...

Hi all, I have 4 boards, on one board lauterbach GUI is stable (flash contents)- it is not running. But on other three boards it is jumping. So...

Hi all, I have 4 boards, on one board lauterbach GUI is stable (flash contents)- it is not running. But on other three boards it is jumping. So my client says, the boards are ok, b'caz they are also use the same boards. So I dont understand what is the problem? Is this really lauterbach issue? And one more every board runs on differen Ejtag clock freq (10,25 or 5 Mhz) Please help.... R...

Hello, I am using the PCF8563 as RTC on my board. It should be plain simple to access via I?C. Other people seem to use it without problems,...

Hello, I am using the PCF8563 as RTC on my board. It should be plain simple to access via I?C. Other people seem to use it without problems, therefore following problem is driving me nuts: I can read and write the registers in the part via I?C. The clock is running at its 32.768kHz. I can set a date and read it back. However: The RTC does not count correctly?!? I observed following: ...

Hello, I'm trying to hook up a 74HCT163 to count from 0 to 7 then loop and keep doing it. I'm having a lot of trouble making sense of the data...

Hello, I'm trying to hook up a 74HCT163 to count from 0 to 7 then loop and keep doing it. I'm having a lot of trouble making sense of the data sheet on how to connect this thing. I have a 555 chip creating my clock, it's lighting an LED right now, I took that from the positive end of the LED and am running it into the counter. I was worried about going straight from the 555 chip to the cou...

Hi all, I have a few questions on how to go about generate the correct waveforms for reading/writing from/to an external flash memory using an...

Hi all, I have a few questions on how to go about generate the correct waveforms for reading/writing from/to an external flash memory using an AVR microcontroller. The AVR has enough I/O to allow direct connection between address, data and control lines. I don't have to worry about counters/latches etc. The AVR is using a 12MHz clock. How do you work out how long each cycle will take? ...

ADS1251 and 8051 Code Has anyone done this who can share the code? Just to save me time. Any gotchas? I'd also quite like...

ADS1251 and 8051 Code Has anyone done this who can share the code? Just to save me time. Any gotchas? I'd also quite like not to take every sample so I can use just the ADS1251 to interrupt so it is both my clock and a data ready interrupt. I suppose it would be best to at least take one bit of the result. TIA, Bill

Can anyone give me an idea as to the bare minimum system requirements for generating the picture information for some NTSC video at a very...

Can anyone give me an idea as to the bare minimum system requirements for generating the picture information for some NTSC video at a very low resolution? I'll be working with a small 8085 microcontroller for which I don't yet have the exact specifications (it either operates at a 1KHz or 1MHz clock speed), and I was wondering if I could somehow use this to generate a composite video sig...

Hi what is your experience with the I2C bus, what is the practical max distance, please specify your pull-up resistor value, I2C clock...

Hi what is your experience with the I2C bus, what is the practical max distance, please specify your pull-up resistor value, I2C clock speed, and distance thank you, best regards Jens -------------------------------------------------------------------------------- Jeg beskyttes af den gratis SPAMfighter til privatbrugere. Den har indtil videre sparet mig for at f? 3924 spa...

Hi, I 'm programming a PIC18F4585 with MPLAB. I want to use the CAN option and I have made the basic C and H files with the aplication maestro...

Hi, I 'm programming a PIC18F4585 with MPLAB. I want to use the CAN option and I have made the basic C and H files with the aplication maestro of Microchip. I 'm working on a clock frequency of 40MHz. These are the settings I have calculated for a baudrate of 125k. #define BAUD_RATE_PRESC 16 #define SJW_TIME 1 #define SAMPLES 1 #define PROP_TIME 2 #define PH_SEG_1 4 #define PH_SEG...

Earlier I was able to interface with a ADC (ADS7871) using the SPI interface provided by FTDI. It was really a struggle but that it is...

Earlier I was able to interface with a ADC (ADS7871) using the SPI interface provided by FTDI. It was really a struggle but that it is working quite good now. Now I am trying to interface with a DAC which is AD5420AREZ from Analog Devices ( http://www.analog.com/static/imported-files/data_sheets/AD5410_5420.pdf ). The pin assignments are as follows: ADBUS0 -> SK = Serial Clock - Connect to A

Although I don't believe in shipping products with parts pushed past their datasheet specs, I'm not above playing around. After a day...

Although I don't believe in shipping products with parts pushed past their datasheet specs, I'm not above playing around. After a day of figuring out the clock and pll on the above chip and getting the pll to run at 64 Mhz, I thought "what the hell" and changed the cpu divider from 2 to 1. The part runs just fine and a scope verified that it is indeed running at 64 Mhz. Not bad for a $1...

As a software guy, I'm looking for an OEM type controller suitable for an industrial setting that just needs to have programming added ......

As a software guy, I'm looking for an OEM type controller suitable for an industrial setting that just needs to have programming added ... preferably an out of box solution with RTOS, a couple of relays, RT clock and some sort of simple user interface (touch screen/buttons whatever) ready to go, with protective enclosure and dev kit ... (C or Forth preferred). required: user i...

Greetings, I'm currently facing a weird problem trying to have a i2c master and several slaves communicate... The slave will only send an...

Greetings, I'm currently facing a weird problem trying to have a i2c master and several slaves communicate... The slave will only send an acknowledge back to the master if the data and clock signals have probes on them. The probes have a 1 M-ohm resistance... As soon as I take the probes off, the master never receives an acknowledge... Any pointer or tip on how to debug this would be ...

Hi out there, I am trying to build a device that reads data for a error measurements as fast as possible. I want to read data from the FX2s...

Hi out there, I am trying to build a device that reads data for a error measurements as fast as possible. I want to read data from the FX2s GPIF and send it to a host PC. Now I have my first test hardware an I am able to transfer data with app. 2,5 MB/s using endpoint 6 with 512 Byte packet size and double buffering. I read data with an external clock of 40 MHz. Data packets are sent by th...

Hi - I have a system that consists of one Atmel SAM7X256 connected via CAN to 6 Microchip MCP2515 chips. The MCP2515s have 20MHz clocks, and the...

Hi - I have a system that consists of one Atmel SAM7X256 connected via CAN to 6 Microchip MCP2515 chips. The MCP2515s have 20MHz clocks, and the SAM7X256 has a 55MHz clock. I have the CAN bus running at 1MHz right now, but the chips aren't perfectly matched. Specifically, the SAM7X256 uses 11TQ, while the MCP2515 uses 10TQ. I had to do this as otherwise I'd have to have fractional baudrate di...