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AS1115-Slide3

Taking a closer look and bringing the AS1115 into the picture, it shows that this IC can do everything required to create this user interface. The AS1115 can drive up to sixty-four single LEDs or eight 7 segment displays (or any combination in-between). Additionally, it features detailed diagnostics for open or short LED detection. The AS1115 is able to read back up to sixteen keys without any additional external components in its easiest configuration. To reduce communication between a host and the AS1115, any interaction between the user and the IC (a key press for example) will be indicated with an IRQ signal which already leads to the I²C interface the part offers. The I²C interface limits the required interconnection on the board to a minimum of two cables (Serial Data and Clock) and, if required, the just mentioned IRQ signal. Additionally, four AS1115 devices can be placed on a single I²C bus.

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