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M24C02-MN3TG Datasheet(PDF) 4 Page - STMicroelectronics |
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M24C02-MN3TG Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 29 page M24C16, M24C08, M24C04, M24C02, M24C01 4/29 SUMMARY DESCRIPTION These I2C-compatible electrically erasable pro- grammable memory (EEPROM) devices are orga- nized as 2048/1024/512/256/128 x 8 (M24C16, M24C08, M24C04, M24C02, M24C01). Figure 2. Logic Diagram I2C uses a two wire serial interface, comprising a bi-directional data line and a clock line. The devic- es carry a built-in 4-bit Device Type Identifier code (1010) in accordance with the I2C bus definition. The device behaves as a slave in the I2C protocol, with all memory operations synchronized by the serial clock. Read and Write operations are initiat- ed by a Start condition, generated by the bus mas- ter. The Start condition is followed by a Device Select Code and RW bit (as described in Table 2.), terminated by an acknowledge bit. When writing data to the memory, the device in- serts an acknowledge bit during the 9th bit time, following the bus master’s 8-bit transmission. When data is read by the bus master, the bus master acknowledges the receipt of the data byte in the same way. Data transfers are terminated by a Stop condition after an Ack for Write, and after a NoAck for Read. Table 1. Signal Names Power On Reset: VCC Lock-Out Write Protect In order to prevent data corruption and inadvertent Write operations during Power-up, a Power On Reset (POR) circuit is included. At Power-up, the internal reset is held active until VCC has reached the POR threshold value, and all operations are disabled – the device will not respond to any com- mand. In the same way, when VCC drops from the operating voltage, below the POR threshold value, all operations are disabled and the device will not respond to any command. A stable and valid VCC (as defined in Table 6. and Table 7.) must be applied before applying any log- ic signal. Figure 3. DIP, SO, TSSOP and MLP Connections (Top View) Note: 1. NC = Not Connected 2. See PACKAGE MECHANICAL section for package dimensions, and how to identify pin-1. AI02033 3 E0-E2 SDA VCC M24Cxx WC SCL VSS E0, E1, E2 Chip Enable SDA Serial Data SCL Serial Clock WC Write Control VCC Supply Voltage VSS Ground SDA VSS SCL WC VCC / E2 AI02034E M24Cxx 1 2 3 4 8 7 6 5 / E2 / E2 / E2 NC / E1 / E1 / E1 / NC NC / E0 / E0 / NC / NC NC /1Kb /2Kb /4Kb /8Kb 16Kb |
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