Re: Help identifying old PC104 board
https://cdn.badcaps-static.com/pdfs/...f3adcf4f8c.pdf
Remove the chip and short pin 21 (/RCLR) to a ground pin. There could be jumpers to facilitate this in-circuit.
Originally posted by thangzero
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Remove the chip and short pin 21 (/RCLR) to a ground pin. There could be jumpers to facilitate this in-circuit.
The RCLR pin is used to clear (set to logic 1) all the general-purpose RAM, but does not affect the RAM associated with the RTC. To clear the RAM, RCLR must be forced to an input logic 0 during battery-backup mode when VCC is not applied. The RCLR function is designed to be used through a human interface (shorting to ground manually or by a switch) and not to be driven with external buffers.
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