The part number you provided, NT5CC256M16ER-EK I, corresponds to a Nanya Technology DRAM (dynamic random-access memory) chip. Nanya Technology is a well-known DRAM manufacturer. This particular part is a 4GB (Gigabit) DDR3 SDRAM module . It features 256M x 16 bits, which means it has a 16-bit wide data bus, and the total memory capacity is 4GB.
Package Type:
NT5CC256M16ER-EKI is usually available in FBGA (Fine Ball Grid Array) package. The "EKI" at the end of the part number may represent the specific packaging or grade. Pin Function Specification and Circuit Principle:Since you are asking for a detailed explanation of the pin functions and circuit principles, here is the breakdown:
The FBGA (Fine Ball Grid Array) package has many pins; typically, it could range from 60 to 180 pins (depending on the exact configuration), and the exact number would be determined by the device's specific memory configuration. A typical DRAM chip might feature 60, 72, 84, 90, 120, or 180 pins.
In this case, without an exact reference to the datasheet, we will discuss the general features and functions of DRAM chip pins in FBGA configuration.
Detailed Pin Function List (Example):
Below is a general breakdown of the pin function for a 256M x 16 bits DDR3 SDRAM DRAM chip. However, please refer to the specific datasheet for this part number for the most accurate and detailed pinout. For illustrative purposes, here is a typical DDR3 SDRAM pinout with descriptions:
Pin No. Pin Name Function Description 1 A0 Address Bus, bit 0 2 A1 Address Bus, bit 1 3 A2 Address Bus, bit 2 4 A3 Address Bus, bit 3 5 A4 Address Bus, bit 4 6 A5 Address Bus, bit 5 7 A6 Address Bus, bit 6 8 A7 Address Bus, bit 7 9 A8 Address Bus, bit 8 10 A9 Address Bus, bit 9 11 A10 Address Bus, bit 10 12 A11 Address Bus, bit 11 13 A12 Address Bus, bit 12 14 A13 Address Bus, bit 13 15 A14 Address Bus, bit 14 16 A15 Address Bus, bit 15 17 DQ0 Data Input/Output, bit 0 18 DQ1 Data Input/Output, bit 1 19 DQ2 Data Input/Output, bit 2 20 DQ3 Data Input/Output, bit 3 21 DQ4 Data Input/Output, bit 4 22 DQ5 Data Input/Output, bit 5 23 DQ6 Data Input/Output, bit 6 24 DQ7 Data Input/Output, bit 7 25 DQ8 Data Input/Output, bit 8 26 DQ9 Data Input/Output, bit 9 27 DQ10 Data Input/Output, bit 10 28 DQ11 Data Input/Output, bit 11 29 DQ12 Data Input/Output, bit 12 30 DQ13 Data Input/Output, bit 13 31 DQ14 Data Input/Output, bit 14 32 DQ15 Data Input/Output, bit 15 33 VDD Power Supply (Positive voltage rail) 34 VSS Ground (Negative voltage rail) 35 VDDQ I/O Voltage Rail 36 VSSQ Ground for I/O voltage rail 37 CS# Chip Select (Active low) 38 CKE Clock Enable (Controls the clock state) 39 ODT On-Die Termination Control 40 RAS# Row Address Strobe (Active low) 41 CAS# Column Address Strobe (Active low) 42 WE# Write Enable (Active low) 43 UDQM Upper Data Mask (Controls data mask) 44 LDQM Lower Data Mask (Controls data mask) 45 CLK Clock signal for the DRAM chip 46 CK# Inverted Clock signal for the DRAM chip 47 A16 Address Bus, bit 16 48 A17 Address Bus, bit 17 49 A18 Address Bus, bit 18 50 A19 Address Bus, bit 19 51 A20 Address Bus, bit 20 52 A21 Address Bus, bit 21 53 A22 Address Bus, bit 22 54 A23 Address Bus, bit 23 55 A24 Address Bus, bit 24 56 A25 Address Bus, bit 25 57 A26 Address Bus, bit 26 58 A27 Address Bus, bit 27 59 A28 Address Bus, bit 28 60 A29 Address Bus, bit 29The above table shows how a typical DRAM chip's pins are arranged, though the actual part number may vary in the number of pins depending on the memory capacity and configuration.
FAQ (20 Questions) About NT5CC256M16ER-EKI Pinout:
Q: What is the pinout of NT5CC256M16ER-EKI? A: The pinout corresponds to the DDR3 DRAM structure with address pins (A0-A29), data pins (DQ0-DQ15), control pins (RAS#, CAS#, WE#, etc.), and power/ground pins.
Q: What is the number of pins in NT5CC256M16ER-EKI? A: The part number typically comes in a 90-pin or 180-pin package depending on its configuration.
Q: What do the address pins (A0-A29) do? A: The address pins are used to select the memory locations for read and write operations.
Q: What is the function of the DQ pins (DQ0-DQ15)? A: The DQ pins are bidirectional data lines used to transfer data between the memory module and the system.
Q: What is the purpose of the CS# pin? A: CS# is the Chip Select pin, which enables or disables the chip’s functionality when low.
Q: What is the function of the CKE pin? A: CKE is the Clock Enable pin, controlling the clock signal’s active state.
Q: What is the WE# pin for? A: WE# is the Write Enable pin, which is used to control write operations to the memory.
Q: What is the function of the RAS# and CAS# pins? A: These pins control the row and column address strobes during memory access cycles.
Q: What is the VDD pin used for? A: VDD is the power supply for the chip, typically 1.5V or 1.35V for DDR3 chips.
Q: What is the purpose of the VSS pin? A: VSS is the ground pin for the chip.
Q: What does the ODT pin control? A: The ODT pin is used for On-Die Termination, which helps in signal integrity during data transfer.
Q: What are the UDQM and LDQM pins? A: These are Data Mask pins for the upper and lower byte of data during write operations.
Q: How does the clock signal (CLK and CK#) work? A: CLK provides the main clock, and CK# is the inverted clock used for synchronization.
Q: What is the function of the VDDQ and VSSQ pins? A: VDDQ is the I/O voltage rail, and VSSQ is the ground for I/O.
Q: How do the address pins work during a read operation? A: During a read, the address pins specify the location, and the corresponding data is transferred through the DQ pins.
Q: What happens if the CKE pin is deasserted? A: If CKE is deasserted, the memory chip enters low-power mode and stops accepting commands.
Q: What does the WE# pin being low signify? A: When WE# is low, a write operation is initiated on the memory.
Q: Can the NT5CC256M16ER-EKI work without the CS# pin? A: No, the CS# pin is essential for activating the memory chip.
Q: What is the significance of the A0-A29 pins for a large memory array? A: These pins select the specific memory address during read and write operations in the large memory array.
Q: What voltage does the VDD pin supply? A: The VDD pin typically supplies 1.5V or 1.35V depending on the DRAM specification.
Please let me know if you need any further detailed specifications or explanations!