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Sorry for my poor english. I think you should get the timing for driving the LCD in datasheet. Timing of LCD is different from one to another.
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Here is timing of my LCD.
alzomor,
If LCD is run at 25Hz with 800 * 600 resolution, the total number of pixels per second is 12MPixel, but the clk of the LCD shoule more than 12MHz, because the blank at start of line and end of line, may be 18MHz.
If you use gpio to drive LCD, processor running at 24MHz, two instructions...
In some Energy Metering IC, AD sample signal at more than 200kSPS, then HPF(remove DC), square, LPF, square root.
My question is if asmple is 200kSPS, input is 50Hz, normalized freq is 0.0005. If i use fir filter, order of HPF(remove DC) is very large.
Can someone show me how can i design this...
If you square signal, and take a moving average directly after sample signal, DC can not be in input signal. I advise you : sample signal, mix with sin and cos(internal DDS generated sin and cos, no DC as expected), LPF, I^2+Q^2, and take the square root of the signal.
In manual of AD9122 from Analog Devices, It mention that Half-Band Filter 1 (HB1) has four modes of operation. In mode 2, this filter is bandpass filter.
In my mind, half-band filter is either lowpass or highpass. Can someone please show me some page that introduce me half-band bandpass filter.
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