From Microchip Technology, Inc.
The 24XXX series serial EEPROMs from Microchip Technology support a bidirectional, 2-wire bus and data transmission protocol. The bus is controlled by the microcontroller (master), which generates the Serial Clock (SCL), controls the bus access and generates the Start and Stop conditions, while the 24XXX serial
EEPROM works as slave. The 24XXX serial EEPROMs are I2C™ compatible and have maximum clock frequencies ranging from 100 kHz to 1 MHz.
This application note is part of a series that provide source code to help the user implement the protocol with minimal effort. Figure 1 is the hardware schematic depicting the interface between the Microchip 24XXX series of I2C serial EEPROMs and NXP's P89LPC952 8051-based MCU. The schematic shows the connections necessary between the MCU and the serial EEPROM as tested, as well as the required pull-up resistors on the clock line (SCL) and data line (SDA).
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