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LR24C02 Scheda tecnica(PDF) 7 Page - Leshan Radio Company |
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LR24C02 Scheda tecnica(HTML) 7 Page - Leshan Radio Company |
7 / 15 page Read Operations RANDOM READ: A random read requires a "dummy" byte write sequence to load in the data word address. Once the device address word and data word address are clocked in and acknowledg ed by the EEPROM, the microcontroller must generate another start condition. The microcontroller now initiates a current address read by sending a device address with the read/write select bit high. The EEPROM acknowledges the device address and serially clocks out the data word. The microcontroller does not respond with a "0" but does generate a following stop condition (see Figure 8 ). SEQUENTIAL READ: Sequential reads are initiated by either a current address read or a random address read. After the microcontroller receives a data word, it responds with an acknowledge. As long as the EEPROM receives an acknowled ge, it will continue to increment the data word address and serially clock out sequential data words. When the memory address limit is reached, the data word address will "roll over" and the sequential read will continue.The sequential read operation is terminated when the microcontroller does not respond with a "0" but does generate a following stop condition (see Figure 9 ). Figure 4: Device Address 1 0 1 0 A2 A1 A0 R/W MSB LSB 2K Figure 5: Byte Write V2.1 7/15 LESHAN RADIO COMPANY, LTD. |
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