I²C device

AT24C256 EEPROM

The AT24C256 EEPROM is an I²C device in the LabWired part catalog. Its catalog type is at24c256. It connects to the MCU over I²C at the default address 0x50. The catalog gives a supply range of 1.7–5.5 V. It has 5 pins. A registered peripheral model runs in the engine: the firmware talks to it over the real bus and gets device-accurate responses.

From the catalog: I²C EEPROM byte/page R/W shell; 32 KiB address space truncated in sim.

Key facts

Category	I²C devices
Catalog type	`at24c256`
Interface	I²C
Default I²C address	`0x50` (80 decimal)
Supply range	1.7–5.5 V
Pins	5
Datasheet	Microchip AT24C256 datasheet

What LabWired simulates

What is simulated

Simulated device model

How it was validated

Built from the datasheet. Implemented from the part’s register documentation and exercised by automated tests. Nothing physical was ever placed next to it.

AT24C256 EEPROM pinout

Power: VCC, GND
I²C: SDA, SCL
GPIO: WP

Pin	Electrical type	Function
`VCC`	Power input	Supply
`GND`	Power input	Supply
`SDA`	Open-drain	I²C data (SDA)
`SCL`	Open-drain	I²C clock (SCL)
`WP`	Input	GPIO

How to simulate the AT24C256 EEPROM in LabWired

Open the Playground at app.labwired.com and place an MCU board.
Add the AT24C256 EEPROM (catalog type at24c256).
Connect VCC and GND to the supply and ground of the board. Use a supply inside the catalog range of 1.7–5.5 V.
Connect SDA and SCL to the I²C data and clock pins of the board.
Connect WP to a free GPIO pin.
Run the firmware. It finds the part on the I²C bus at 0x50 and reads and writes it as on hardware.

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