I am using a Contact Image Sensor (CIS) which has 6 analogue output taps. I'm planning to use 2 AFE chips LM98722 which have 3 analogue inputs each. I am supplying an external SH_R pulse to both AFEs and they will use the same clock. AFE1 will generate the R,G,B pulses to drive the LEDs within the CIS. AFE1 will then generate tag data which tells me which colour was scanned. AFE2 needs to be synchronised to AFE1 so that it generates the correct output data, however the tag bits cannot be used since AFE2 is not generating the R,G,B pulses. Is it possible to synchronise the 2 AFEs together in some way e.g. possibly as follows: 1) stop the SH_R pulses 2) Set up the registers 3) Apply software reset to reset the state machines 4) Lock the registers so that the state machines are now operating 5) Apply the SH_R pulses to both AFEs to start the 2 off in synchronism Thanks in advance John Hemmings
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