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AT24MAC602-MA11M-T Datasheet(PDF) 8 Page - ATMEL Corporation |
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AT24MAC602-MA11M-T Datasheet(HTML) 8 Page - ATMEL Corporation |
8 / 28 page 8 Atmel AT24MAC402/602 [DATASHEET] 8807A–SEEPR–6/12 4. Device Operation Clock and Data Transitions: The SDA pin is normally pulled high with an external component such as a pull-up resistor. Data on the SDA pin may change only during SCL low time periods (see Figure 4-4 on page 9). Data changes during SCL high periods will indicate a Start or Stop condition as defined below. Start Condition: A high-to-low transition of SDA with SCL high is a Start condition which must precede any other command (see Figure 4-5 on page 9). Stop Condition: A low-to-high transition of SDA with SCL high is a Stop condition. After a read sequence, the stop command will place the EEPROM in a standby power mode (see Figure 4-5 on page 9). Acknowledge: All addresses and data words are serially transmitted to and from the EEPROM in 8-bit words. The EEPROM sends a zero to acknowledge that it has received each word. This happens during the ninth clock cycle. Standby Mode: The AT24MAC402/602 features a low-power standby mode which is enabled upon Power-up or After the receipt of the Stop bit and the completion of any internal operations. 2-Wire Software Reset: After an interruption in protocol, power loss or system reset, any 2-wire part can be reset by following these steps: 1. Create a start bit condition. 2. Clock nine cycles. 3. Create another start bit followed by Stop bit condition as shown below. Figure 4-1. Software Reset Figure 4-2. Bus Timing SCL Serial Clock, SDA: Serial Data I/O SCL 9 Start Bit Start Bit Stop Bit 8 3 2 1 SDA Dummy Clock Cycles SCL SDA IN SDA OUT |
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