资 源 简 介
The Microchip Technology Inc. 24LC41A is a dual port128 x 8 and 512 x 8-bit Electrically Erasable PROM(EEPROM). This device is designed for use in applicaTIonsrequiring storage and serial transmission ofconfiguraTIon and control informaTIon. Three modes ofoperaTIon have been implemented:• Transmit-only mode for the DDC Monitor Port• Bidirectional mode for the DDC Monitor Port• Bidirectional, industry-standard 2-wire bus for the4K Microcontroller Access PortUpon power-up, the DDC Monitor Port will be in theTransmit-only mode, repeatedly sending a serial bitstream of the entire memory array contents, clocked bythe VCLK pin. A valid high-to-low transition on theDSCL pin will cause the device to enter the transitionmode, an look for a valid control byte on the I2C bus. Ifit detects a valid control byte from the master, it willswitch to Bidirectional mode, with byte selectable read/write capability of the memory array using DSCL. If nocontrol byte is received, the device will revert to theTransmit-only mode after it received 128 consecutiveVCLK Package Type pulses while the DSCL pin is idle.The 4K-bit microcontroller port is completely independentof the DDC port, therefore, it can be accessedcontinuously by a microcontroller without interruptingDDC transmission activity. The 24LC41A is available ina standard 8-pin PDIP package in both commercial andindustrial temperature ranges.
