7i52s replaced ic pin continuity question
i accidentally destroyed an ic and already have replaced it but when measuring continuity with my multimeter i saw that two pins have a connection (most likely on the board because i have ordered 2 ics and the other new one doesnt have a connection on these pins). There are 3 other same ics on the 7i52s and none of them has connection on these pins thats why im asking. Maybe there could be another component broken? Right now i dont want to connect the board to my 7i80 if i dont know if this is supposed to be or not.
i have uploaded a picture showing those pins.
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8 is chip ground, 7 and 15 are unused inputs
4,12,16 are 5V
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Do you have the enable signal for TX0 set low? (pin 47 on the 50 pin connector) If not, the outputs will float.
i remember i had to add this but i dont remember what it did.
setp hm2_7i80.0.gpio.000.is_output true
setp hm2_7i80.0.gpio.023.is_output true
setp hm2_7i80.0.gpio.000.out false
setp hm2_7i80.0.gpio.023.out false
now i have step signal on COM0 as well but still COM1 and COM3 dont generate Step signals.
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Are the output levels OK? (close to 5V when high and close to 0 when low)
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Are the output levels OK? (close to 5V when high and close to 0 when low)
always measured at pin TX0A/TX1A/TX2A/TX3A/TX4A/TX5A:
COM0: 0V/4.513V
COM1: 0.005V/4.495V
COM2: 0.007V/4.499V
COM3: 0.002V/4.514V
COM4: 0.005V/4.493V
COM5: 0.007V/4.500V
so basically around 0 and 4.5v
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