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Change limit from 4 to 256 for sn74hc595 (#2490)

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Jesse Hills 2022-12-07 07:23:11 +13:00 committed by GitHub
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components/sn74hc595.rst
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@ -8,7 +8,7 @@ The SN74HC595 component allows you to use SN74HC595 shift registers as I/O expan
(`datasheet <http://www.ti.com/lit/ds/symlink/sn74hc595.pdf>`__,
`SparkFun`_) in ESPHome. It uses 3 wires (optionally 4) for communication.
Once configured, you can use any of the 8 pins for your projects. Up-to 4 shift registers can be daisy-chained
Once configured, you can use any of the 8 pins for your projects. Up-to 256 shift registers can be daisy-chained
to provide more pins, without using more GPIO pins on the controller.
Use of the OE pin is optional. If used, the pin should be pulled up externally.
@ -50,7 +50,7 @@ Configuration variables:
- **clock_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): Pin connected to SN74HC595 SRCLK (SH_CP) pin
- **latch_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): Pin connected to SN74HC595 RCLK (ST_CP) pin
- **oe_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): Pin connected to SN74HC595 OE pin
- **sr_count** (*Optional*, int): Number of daisy-chained shift registers, up-to 4. Defaults to ``1``.
- **sr_count** (*Optional*, int): Number of daisy-chained shift registers, up-to 256. Defaults to ``1``.
Pin configuration variables: