The AT24C64D-SSHM-T is a part from Microchip Technology, specifically an EEPROM ( Electrical ly Erasable Programmable Read-Only Memory ) device.
For your request on the detailed specifications of the pin functions, package, and usage, I will provide the following:
Package Type & Pinout Details Pin Function List Pinout in Table Format 20 Frequently Asked Questions (FAQ) about the AT24C64D-SSHM-TLet me start by providing a detailed breakdown.
1. Package Type & Pinout
The AT24C64D-SSHM-T is typically offered in the SOIC-8 (Small Outline Integrated Circuit) package, meaning it has 8 pins.
Package Type: SOIC-8 (8 Pins) Pin Count: 8 pins2. Pin Function List
This list will describe the functionality of each pin on the AT24C64D-SSHM-T:
Pin 1: A0 (Address Bit 0) Function: A0 is the least significant address bit used to select one of the 256 pages (each containing 64 bytes of memory). It is part of the address that is used to select a specific memory location for reading or writing data. Usage: It is typically connected to logic to select specific address ranges in a memory map. Pin 2: A1 (Address Bit 1) Function: A1 is the second least significant address bit. It works with A0 to select the specific memory addresses on the chip. Usage: Same as A0, used for memory addressing. Pin 3: A2 (Address Bit 2) Function: A2 is the third least significant address bit, helping in further narrowing down the selection of memory locations. Usage: Combined with A0 and A1 for detailed memory addressing. Pin 4: VSS (Ground) Function: This pin connects the chip to ground (0V). Usage: Essential for proper operation of the chip as it completes the electrical circuit. Pin 5: SDA (Serial Data) Function: This is the bi-directional data line used for both reading and writing to the memory. Communication with the device is done over the I2C interface , which uses this line for sending and receiving data bits. Usage: Typically connected to the microcontroller or other I2C master device. Pin 6: SCL (Serial Clock ) Function: The clock line used in I2C communication. It synchronizes data transfer between the master and the EEPROM. Usage: It must be connected to the corresponding clock line on the microcontroller or I2C bus. Pin 7: WP (Write Protect) Function: This pin is used to protect the memory from being written to. If WP is held low, the memory is write-protected; if it is high, writing to memory is allowed. Usage: Usually connected to a logic level (either high or low) depending on whether write protection is desired. Pin 8: VCC ( Power Supply) Function: The power supply pin. This must be connected to a positive voltage, typically 3.3V or 5V, depending on your application. Usage: Provides the necessary power for the device's internal logic.3. Pinout in Table Format
Pin Number Pin Name Function Description 1 A0 Address Bit 0 (Least Significant) 2 A1 Address Bit 1 3 A2 Address Bit 2 4 VSS Ground (0V) 5 SDA Serial Data (I2C) 6 SCL Serial Clock (I2C) 7 WP Write Protect (Active Low) 8 VCC Power Supply (3.3V or 5V)4. 20 Frequently Asked Questions (FAQ)
Q1: What is the AT24C64D-SSHM-T used for? A1: The AT24C64D-SSHM-T is a 64Kb EEPROM used for storing data in applications where non-volatile memory is required, such as configuration settings and user data storage.
Q2: How do I interface the AT24C64D-SSHM-T with a microcontroller? A2: The AT24C64D-SSHM-T interfaces with a microcontroller via the I2C protocol, using SDA for data and SCL for clock signals.
Q3: What voltage should VCC be connected to? A3: VCC should be connected to a power supply between 3.3V to 5.5V, depending on your system requirements.
Q4: What is the maximum I2C clock speed for the AT24C64D-SSHM-T? A4: The maximum I2C clock speed is 400 kHz (Fast Mode) for this device.
Q5: Can the AT24C64D-SSHM-T store more than 64KB of data? A5: No, the AT24C64D-SSHM-T is a 64Kb EEPROM, equivalent to 8,192 bytes of storage.
Q6: How is the Write Protect (WP) pin used? A6: When WP is connected to ground (low), the device can be written to. When WP is high, writing to the memory is disabled, protecting the stored data.
Q7: What happens if I don't use the WP pin? A7: If not used, you can either leave the WP pin floating or tie it to ground, allowing writing to memory.
Q8: Can I read data from the AT24C64D-SSHM-T at any time? A8: Yes, you can read from the AT24C64D-SSHM-T anytime, as long as the device is properly powered and the I2C interface is active.
Q9: How do I address specific memory locations? A9: You address memory by sending the appropriate 8-bit address (formed by A0, A1, and A2) along with a memory page address in the I2C protocol.
Q10: What is the significance of the A0, A1, and A2 pins? A10: These pins are used to select specific addresses in the memory array, effectively enabling access to different memory pages.
Q11: Is there a built-in feature for data retention in case of power loss? A11: Yes, the AT24C64D-SSHM-T retains data without power for a typical duration of 100 years, thanks to its EEPROM technology.
Q12: What type of memory is used in the AT24C64D-SSHM-T? A12: The AT24C64D-SSHM-T uses Electrically Erasable Programmable Read-Only Memory (EEPROM) technology.
Q13: Can I overwrite data in the AT24C64D-SSHM-T? A13: Yes, you can overwrite data as long as the write protection pin (WP) is not enabled.
Q14: How long does a write operation take on the AT24C64D-SSHM-T? A14: A write operation typically takes about 5ms to 10ms.
Q15: Can the AT24C64D-SSHM-T be used for serial communication other than I2C? A15: No, the AT24C64D-SSHM-T specifically supports I2C communication for data transfer.
Q16: What is the maximum number of devices that can be connected on the I2C bus? A16: The maximum number of devices depends on the I2C bus configuration, but up to 8 devices can be addressed using the A0, A1, and A2 pins.
Q17: Does the AT24C64D-SSHM-T support page write operations? A17: Yes, the AT24C64D-SSHM-T supports page write operations, allowing you to write multiple bytes of data at once.
Q18: What is the current consumption during operation? A18: The typical operating current consumption is around 400 µA during a read operation and 500 µA during a write operation.
Q19: How do I initialize the AT24C64D-SSHM-T? A19: Initialization is done by sending a start condition on the I2C bus, followed by the memory address and data for reading or writing.
Q20: Can I interface the AT24C64D-SSHM-T with a 5V system? A20: Yes, the AT24C64D-SSHM-T can be used with a 5V system as long as the power supply pin (VCC) is connected to a 5V source.
This detailed response covers the pinout, functionality, and FAQs for the AT24C64D-SSHM-T. Let me know if you need further details or clarifications!
