Memory module and memory system having the same
A memory module includes a serial presence detector (SPD) configured to detect a module identification (ID) through at least one module position identification terminal, and generate at least one of the module ID and a register address corresponding to the module ID. A power management unit (PMU) is responsive to at least one of the module ID and the register address generated by the SPD. The PMU is configured to set an on-time point and/or an off-time point of an internal clock signal based on at least one of the module ID and the register address corresponding to the module ID, and further configured to generate at least one internal power supply voltage in response to the internal clock signal. A plurality of memory devices are also provided, which are configured to receive the at least one internal power supply voltage and perform an operation in response to command/address signals.
1. An operating method of a memory module, comprising:
generating position data related to a corresponding module slot of a main board by a serial presence detector when the memory module is inserted into the corresponding module slot of the main board;
transferring the position data to a power management integrated circuit using serial data and a serial clock signal of the corresponding module slot;
generating a frequency offset code in response to the position data by the power management integrated circuit;
adjusting a switching frequency of an internal clock signal according to the frequency offset code;
operating a first voltage regulator of the power management integrated circuit at a first switching frequency of the internal clock signal; and
operating a second voltage regulator of the power management integrated circuit at a second switching frequency of the internal clock signal,
wherein the first switching frequency and the second switching frequency are different.
2. The method of claim 1 , wherein the serial presence detector generates the position data by recognizing a position of the corresponding module slot.
3. The method of claim 2 , wherein the corresponding module slot includes a resistor connected to a terminal connected to the serial present detector,
wherein the generating the position data includes:
recognizing a value of the resistor in the serial present detector; and
generating the position data according to the value of the resistor.
4. The method of claim 1 , further comprising,
generating an internal voltage in each of the first voltage regulator and the second voltage regulator in response to the internal clock signal.
5. The method of claim 4 , wherein the each one of the first voltage regulator and the second voltage regulator is activated in response to the internal clock signal and generates the internal voltage using an external power supply voltage.
6. The method of claim 5 , wherein the first voltage regulator and the second voltage regulator generate different internal voltages in response to the internal clock signal.
7. The method of claim 1 , wherein the adjusting the switching frequency of the internal clock signal includes:
generating the internal clock signal in an internal clock signal generator of in the power management integrated circuit; and
adjusting the internal clock signal in the internal clock signal generator according to the frequency offset code.
8. The method of claim 1 , further comprising, storing the frequency offset code in a register of in the power management integrated circuit.
9. The method of claim 1 , wherein the serial present detector transfers the position data to the power management integrated circuit through an I2C/I3C communication.
10. The method of claim 1 , wherein the frequency offset code corresponds to an identification number of module slots of the main board.
11. A memory module comprising:
a serial presence detector configured to generate position data related to a corresponding module slot of a main board when the memory module is inserted into the corresponding module slot of the main board;
a power management integrated circuit configured to receive the position data from the serial presence detector, to generate a frequency offset code in response to the position data, to adjust a switch frequency of an internal clock signal according to the frequency offset code, to operate a first voltage regulator at a first switching frequency of the internal clock signal; and
to operate a second voltage regulator at a second switching frequency of the internal clock signal; and
a plurality of memory devices configured to receive at least one internal power from the first voltage regulator and the second voltage regulator and to perform an operation in response to command/address signals,
wherein the first switching frequency and the second switching frequency are different.
12. The memory module of claim 11 , further comprising at least one module position identification terminal, wherein the serial presence detector detects a passive element connected to the at least module position and generates the position data.
13. The memory module of claim 11 , wherein the power management integrated circuit includes a register configured to store the frequency offset code.
14. The memory module of claim 11 , wherein the power management integrated circuit includes an internal clock signal generator configured to generate the internal signal having an on-time point or an off-time point set in response to the frequency offset code corresponding to the position data.
15. The memory module of claim 11 , further comprising:
a temperature sensor communicatively coupled to the power management integrated circuit; and
a register clock driver communicatively coupled to the power management integrated circuit,
wherein the resister clock driver receives and transmits the command/address signals to the plurality of the memory devices.
16. A memory system comprising:
a main board having a plurality of module slots;
a plurality of memory modules mounted in the plurality of module slots, respectively; and
a controller configured to control the plurality of memory modules,
wherein each of the plurality of memory modules includes a voltage regulator configured to receive an external power supply voltage and to generate an internal power supply in response to an internal clock signal,
wherein the each of the plurality of memory modules adjusts a switching frequency of the internal clock signals according to position data related to a corresponding module slot of the main board;
wherein switching frequencies of voltage regulators are not same.
17. The memory system of claim 16 ,
wherein the controller generates the position data, which is transferred to the plurality of memory modules, respectively, and
wherein the position data includes a module identification number.
18. The memory system of claim 16 , wherein the each of the plurality of memory module detects a voltage or a current of a module position identification terminal and generates the position data according to the detected voltage or the detected current.
19. The memory system of claim 16 , wherein the each of plurality of memory modules includes a power management integrated circuit having the voltage regulator,
wherein the power management integrated circuit generates a frequency offset code corresponding to the position data and adjust the internal clock signal in response to the frequency offset code.
20. The memory system of claim 16 , wherein the each of the plurality of the memory modules includes a serial present detector configured to generate the position data by detecting a passive element when the each of the plurality of memory modules inserted into corresponding module slot of the main board.