Hello, We are considering using an upcoming version of the Intel Atom SoC, I believe the current code name is tunnel creek. Anyway, my boss...

Hello, We are considering using an upcoming version of the Intel Atom SoC, I believe the current code name is tunnel creek. Anyway, my boss asked me the other day how we could expect the Intel Atom to perform in comparison to a comparable ARM9(same amount of cache, clock, bus to RAM, amount of RAM). I was a bit stumped, another engineer said he would expect the Atom to blow away a comparable AR...

I am using a Atmel4SD32C processor. For the main clock crystal Atmel specifiey the following requirements: CLEXT Maximum External Capacitor on...

I am using a Atmel4SD32C processor. For the main clock crystal Atmel specifiey the following requirements: CLEXT Maximum External Capacitor on XIN and XOUT 17 pF Allowed Crystal Capacitance Load From crystal specification 12.5 – 17.5 pF CLOAD Internal Equivalent Load Capacitance Integrated load capacitance (XIN and XOUT in series) 7.5min 9.5typical 10.5 pFmax Calculation f

Hi, I'm using 9S08 for several years and I never had any problem with the BDM. Now, I've just designed a new 9S12E64 board but I can enter...

Hi, I'm using 9S08 for several years and I never had any problem with the BDM. Now, I've just designed a new 9S12E64 board but I can enter "True Time Simulator & Real Time Debugger". The errors messages are : "Failed to find communication speed!" and just after : "Communication to the targer failed (target MCU has no clock or wrong BDM wlock oe derivative is secured)" - I've looke...

Hello, does anybody know why the peripherals clock is not working when simulating my application with Crosswork Debug? My board is an Olimex...

Hello, does anybody know why the peripherals clock is not working when simulating my application with Crosswork Debug? My board is an Olimex OKI-H5003, with an ARM7TDMI Oki core. I want to specify that the application is working fine on the board, so the code is ok. I just want to simulate the application to see what actually happens but none of the peripherals is working (already tried...

Hello, I am porting ARM PL180 SD/MMC controller. Its is working fine in initialization, Read OCR, CSD etc. It also reads the block fine....

Hello, I am porting ARM PL180 SD/MMC controller. Its is working fine in initialization, Read OCR, CSD etc. It also reads the block fine. Its write block works fine for some blocks but then i receive TX under run error in the status register. I am using block write. I have tried the following workarounds: 1. Reduce the clock frequency [No success: situation remains same]. 2. Put some d...

Hi, we are working with SC28C94 for data communication. this IC(SC28C94) we are using in polling mode not in interrupt mode.My main aim is...

Hi, we are working with SC28C94 for data communication. this IC(SC28C94) we are using in polling mode not in interrupt mode.My main aim is to trasmit a single charecter(ie A(0x41) or B(0x42) or .....) continuously. we are giving 8MHz clock from external. Here iam sedning my Code typedef unsigned long USHORT; typedef unsigned int UINT; typedef unsigned char UCHAR; int ma...

I am looking for small embedded ARM board with ethernet+USB+multiple RS232+general purpose parallel I/O lines+multiple channel ADC+realtime...

I am looking for small embedded ARM board with ethernet+USB+multiple RS232+general purpose parallel I/O lines+multiple channel ADC+realtime clock and capable of running Linux. (Am I sking too much?) Do you know ARM board with these specs?

VLSI Design Special Issue on Networks-on-Chip Call for Papers --------------- Single chip and embedded systems are becoming increasingly...

VLSI Design Special Issue on Networks-on-Chip Call for Papers --------------- Single chip and embedded systems are becoming increasingly complex and heterogeneous. Such systems-on-chip (SoCs) imply the seamless integration of numerous IP cores performing different functions and operating at different clock frequencies. On one hand, this integration process requires standard interface...

I've recently been dealing with a plethora of high-speed serial data streams. LVDS is nice. The interface I've recently been given (80MHz...

I've recently been dealing with a plethora of high-speed serial data streams. LVDS is nice. The interface I've recently been given (80MHz serial, 3.3V 50R coax, data and clock, driven by a BUF602 video amplifier, single-ended and referred to ground) is not. Right now I'm thinking of co-opting an LVDS receiver (with some biasing to bring the common-mode back up to around 1.2V) to receive...

Hi, I'm running VxWorks Os on a Pentium 3 processor. The VxWorks timers are based on the OS ticks (several mili seconds), but I need a way...

Hi, I'm running VxWorks Os on a Pentium 3 processor. The VxWorks timers are based on the OS ticks (several mili seconds), but I need a way to measure small time intervals of micro seconds. Is there a Real Time clock register to read, or a cotinueosly running counter register to calculate the interval time from it? Thanks.

Hi All, I had a small question on synchronization in TDMA protocols. Lets assume the case where we have a master and some nodes and each...

Hi All, I had a small question on synchronization in TDMA protocols. Lets assume the case where we have a master and some nodes and each of the nodes have their own pre-assigned time slot. Supposing each TDMA node has a crystal-clock which has some deviation(lets say few tens of ppms), how do we manage to wake the nodes up correctly at their pre- assigned time slot ? One way is to somehow ...

Hi All , I am working with a 8 bit Atmega2560 uC, when operating at 16 Mhz clock the maximum frequency of PWM I can generate is ~31Khz at 8...

Hi All , I am working with a 8 bit Atmega2560 uC, when operating at 16 Mhz clock the maximum frequency of PWM I can generate is ~31Khz at 8 bit resolution. Are there any external PWM generator ICs which I can use to generate higher frequency PWM signals? Also If I want to sin modulate the PWM with sin wave of 4khz then is 31khz (PWM Wave) enough? Any guideline would be appreciated a l...

I am inexperienced with analog thingy. My digital clock is 40MHz, modulates a 10mbps bit stream into some waveforms. The modulated output...

I am inexperienced with analog thingy. My digital clock is 40MHz, modulates a 10mbps bit stream into some waveforms. The modulated output value lies between two narrow bands, 0-63 for input zero or 960-1023 for input ones, when input bit flips, output also change between lower band and higher band. When input bit remain unchanged, output flactuates within their narrow bands. Now my t...

I am tring to interface PS/2 mouse (optical) with a 8052 (AT89S52) microcontroller. From what I get from the internet without adding any extra...

I am tring to interface PS/2 mouse (optical) with a 8052 (AT89S52) microcontroller. From what I get from the internet without adding any extra hardware I cannot interface the mouse directly with the UART (serial port) of the microcontroller (mouse has data and clock lines; uC has RXD, TXD). 1. Are baud rates defined for asynchronous serial communication? What are the common baud rates used ...

Hi mai i ask your help? I'm using a Freescale MKV31F256 microcontroller as I2C Master,pullup resistors are 10K; I used low level...

Hi mai i ask your help? I'm using a Freescale MKV31F256 microcontroller as I2C Master,pullup resistors are 10K; I used low level drivers(Hal) to manage a simple I2C communication with a 24C02 I send START,Address byte,acknowledged,then i send the 2nd byte,and at the 9th clock instead the expected ACK from the device,i have an intermediate level between VCC and VDD,how can this be...

Hi friends, I am working on 16 - channel data acquisition project, Silab C8051F310 + ADS1255 + external multiplexer. ADC crystal is 7.643...

Hi friends, I am working on 16 - channel data acquisition project, Silab C8051F310 + ADS1255 + external multiplexer. ADC crystal is 7.643 MHz. SPI clock freq is 1.58 MHz Hardware interface- CS --> permanently tied to ground 3 wire SPI (SCK, MOSI, MISO) DRDY as external interrupt source When I debug the code by step by step it works most of the time. But in normal case it does n

In college, I was always told not to leave input pins floating on a device such as a 74HCT chip. I was told that the device might...

In college, I was always told not to leave input pins floating on a device such as a 74HCT chip. I was told that the device might behave erratically if any of its inputs are floating. I have the PIC16F684. One of its inputs goes to the data input of a shift register, and the other goes to the clock input of the same shift register. On the shift regsiter, there's an RC circuit on the ma...

A peek at faster Power6, Cell chips At a chip show, IBM to tout 5GHz-topping Power6 and next-gen 6GHz Cell. Intel to detail a 4GHz, 80-core...

A peek at faster Power6, Cell chips At a chip show, IBM to tout 5GHz-topping Power6 and next-gen 6GHz Cell. Intel to detail a 4GHz, 80-core prototype. By Stephen Shankland Staff Writer, CNET News.com Published: December 29, 2006, 8:14 AM PST Judging by details revealed in a chip conference agenda, the clock frequency race isn't over yet. IBM's Power6 processor will be able to e...

I have a mask ROM 80C51 in an old computer, made 1992. The top of the 44 pin PLCC says: Philips logo 0290,031-01 WP J399 223380 DfD9240V6...

I have a mask ROM 80C51 in an old computer, made 1992. The top of the 44 pin PLCC says: Philips logo 0290,031-01 WP J399 223380 DfD9240V6 YU (R) (C) INTEL 1980 (R) PHILIPS 1989 The schematic tells me it's an 80C51, but no other part numbers. 0290,031-01 is the customer's (Acorn's) part number. I don't know what sort of 8051 it is inside. The clock line XTAL1 is driven directly fr...

I just finished debugging a FX2 board design and thought I would proactively post the solution to a problem that may bite other people. The...

I just finished debugging a FX2 board design and thought I would proactively post the solution to a problem that may bite other people. The FX2 has a pin called "reserved". The board designer left it floating instead of grounding it as per the FX2 design doc. Since it's called "reserved", it was easy to miss in design reviews - the name implies it should be left open. The error prevente...