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+Abracon ABX80X I2C ultra low power RTC/Alarm chip
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+
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+The Abracon ABX80X family consist of the ab0801, ab0803, ab0804, ab0805, ab1801,
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+ab1803, ab1804 and ab1805. The ab0805 is the superset of ab080x and the ab1805
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+is the superset of ab180x.
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+
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+Required properties:
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+
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+ - "compatible": should one of:
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+ "abracon,abx80x"
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+ "abracon,ab0801"
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+ "abracon,ab0803"
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+ "abracon,ab0804"
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+ "abracon,ab0805"
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+ "abracon,ab1801"
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+ "abracon,ab1803"
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+ "abracon,ab1804"
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+ "abracon,ab1805"
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+ "microcrystal,rv1805"
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+ Using "abracon,abx80x" will enable chip autodetection.
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+ - "reg": I2C bus address of the device
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+
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+Optional properties:
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+
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+The abx804 and abx805 have a trickle charger that is able to charge the
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+connected battery or supercap. Both the following properties have to be defined
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+and valid to enable charging:
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+
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+ - "abracon,tc-diode": should be "standard" (0.6V) or "schottky" (0.3V)
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+ - "abracon,tc-resistor": should be <0>, <3>, <6> or <11>. 0 disables the output
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+ resistor, the other values are in kOhm.
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