Renesas UPD78F9456GB-8EU-A

Controller

P/N UPD78F9456GB-8EU-A
Manufacturer Renesas
Description MCU 8-bit 78K0S CISC 16KB Flash 2.5V/3.3V/5V 64-Pin TQFP
D/C 12/08
Packaging Tray
ROHS Status RoHS

Controller

https://en.wikipedia.org/wiki/Controller_(computing)

In computing and especially in computer hardware, a controller is a chip, an expansion card, or a stand-alone device that interfaces with a peripheral device. This may be a link between two parts of a computer (for example a memory controller that manages access to memory for the computer) or a controller on an external device that manages the operation of (and connection with) that device.

The term is sometimes used in the opposite sense to refer to a device by which the user controls the operation of the computer, as in game controller.
In desktop computers the controller may be a plug in board, a single integrated circuit on the
motherboard, or an external device. In mainframes the controller is usually either a separate device attached to a channel or integrated into the peripheral.

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