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== cam84 == CCD camera based on ICX453AQ (D40/D50/D70/D70s) chip. This chip is also used in astro camera QHY8PRO. * Camera resolution is 3000×2000 = 6Mpx * Square pixel 7.8 x 7.8um * 16bit ADC with CDS * Color RGB Bayer * 28.4 mm diagonal * USB 2.0 interface * Readout time is ±2s This camera is based on FT2232H chip working in bit-bang mode, so no need to compile firmware or programming MCU. FT2232H allows to create 2 USB slave high speed devices(one for controlling camera, second for downloading image). ADC – AD9826. Complete 16-bit Imaging Signal Processor with gain(0..63) and offset (-127 ..+127) control. Vertical CCD Driver (Sony CXD1267) is controlled through shift register 74HC595. Horizontal Driver is semi software. Based on dual high-speed MOSFET driver MAX4428 which contains one inverting and one non-inverting section. It drives 6 volts to CCD in counterphase. In future releases I think ill replace it with specialized ISL55111 chip. Camera uses several power supplies (LDO/DC-DC) and runs from 12V PS. * 2 LP2985-33 for FT2232 and shift registers * 2 LP2985-50 for ADC digital and analog supply * 1 LM2937-50 for DC-DC bias PS and nor-gate * 1 AD3336ARMZ with 6 Volt for horizontal register * 1 TPS65130 for -8/+15 for CCD bias supply * FT2232 have ability to be self powered, but currently it runs from VBUS The camera works in next sequence * Generating bitbang impulses (around 24Mb) * Write it to output buffer of FT driver. * Start dedicated thread for reading on 2nd part of FT2232 * Send output buffer * Waitng for input to be finished * Forming image * Goto 2 http://astroccd.org/2015/04/cam84/ <br>
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