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s1d13506 driver
Frankly, given a choice, I would not use the S1D13506 external LCD controller for a 640x480 due to the wait states needed to access the controller RAM. It tends to be very slow. Cause of the problem is the 70 ns RAM on these controllers.
You can consider an ARM controller...
csma cd and csma ca
Sobakava, CAN is the answer.
Of course you can sense RS485 bus is idle by simply implementing time out on the serial receive. If no byte received in say 1 second, the bus is idle. However, what happens when two devices start sending data at the same time?
If you can...
Re: Where can I find algorithm for RS485 network communicati
Actually, you need a token ring passing protocol where each micro must wait it's turn before it can speak. So, basically, you need the following:
0. Each micro must have a unique address
1. logic to claim token: Say, x ms times the...
need more uart port
We have used the LPC2106 with two UART's and created two more (one full duplex and one half duplex) very easily. I would not recommend to do this with an 8051 or a PIC core. The 0 wait state flash in the LPC2106 makes it very fast. Cost wise it turns out to be a cheaper...
pt1000 tabel
If you are located just behind me, check www.omega.com where you can get a lot of handbooks. They include the RTD and thermocouple tables.
Ajay
Frankly, I believe the future will be decided NOT by the demand but the supply. The DIP chips are at this time cheaper to make compared to the SMD chips for the same volume. However, the new IC packaging machines coming out will change this situaion. So, the suppliers will eventually move to...
Depends on what your application is. What do you need to do with the PLC? If you like programming in C, Zworld is OK. If you prefer more off the shelf solutions with ladder or stage programming, Koyo, IDEC, Aromat, Keyence all are pretty good.
If you are an OEM, you may also want to...
Please mention how much flash and RAM you need. The Samsung chip with 4 MB flash and 512 kB SRAM is around $5 (better in high quantities). AMD also has good solutions.
We have been burnt by these chips since they seem to have very low life. We have had situations where a new design became...
+download +silabs +si8250
What is the motivation to build an SMPS using microcontroller? Anything specific? Frankly, the PWM controllers for SMPS are so inexpensive now and give the ideal performance.
Aoxomox is correct in pointing out the problem with corner frequency. The only way out is...
casio cmd500tt10
What processor are you using? Epson makes good controllers for the QVGA type color lcd's. The 13705 series is quite good.
However, my recommendation (if you are still open to a CPU) is to use the Samsung or Sharp ARM7 solution which comes with the built in LCD controller...
Designing RS-485 bus
Hi Volta
Actually, Modbus is a very simple protocol to implement once you get past the 3.5 character delay timers. In an embedded system, it is even simpler since you have direct control over your timers.
Are you designing a Master or a Slave? Accordingly, the...
RS485 using fiber optic cable? Are you looking for protocols or physical layers?
Ethernet sounds like a pretty good option. Multidropping is not only a function of the physical layer but also of protocol. Do you need colision detection and recovery mechanism?
Also consider Lonworks if...
microcontroller 220v switch without relay
pisoiu is right on the money. The source of the problem is the high transient coming in from the current switching. Even if you optically isolate the low level circuit, good grounding is still a MUST for such systems. The idea is to reduce the loop...
toshiba ex100
I have the disks but it is protected (you must have the master disk in floppy, yes, in those days, floppies were used!!).
Where are you located? I can see if my friends (old colleagues) can help you.
Ajay
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