Maybe we are more familiar with the term Minimum System AT89C2051 circuit, but this time I present a circuit which is not only a series of Minimum System AT89C2051 but more than that.

System circuit (not) Minimum (Evaluation Board) AT89C2051 and AT89C4051

The circuit is more deserves to be called Evaluation Board AT89C2051 and AT89C4051. Some of the advantages of circuit Minimum System AT89C2051 / AT89C2051 and AT89C4051 Evaluation Board which I was present this time, hardware-hardware support below:

RS-232 interface, DB-9
Header for LCD display
I2C, PCF8574 I / O extender

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