Memory device for supporting new command input scheme and method of operating the same
A method of operating a memory device including row pins and column pins includes receiving a first active command through the row pins during 1.5 cycles of a clock signal, receiving a first read command or a first write command through the column pins during 1 cycle of the clock signal, receiving a first precharge command through the row pins during a 0.5 cycle of the clock signal corresponding to a rising edge of the clock signal, receiving a second active command through the row pins during the 1.5 cycles of the clock signal, receiving a second read command or a second write command through the column pins during the 1 cycle of the clock signal, and receiving a second precharge command through the row pins during the 0.5 cycle of the clock signal corresponding to a falling edge of the clock signal.
1. A memory device comprising:
a clock pin configured to receive a clock signal;
row pins configured to receive a first active command and a first precharge command during a first time period, and receive a second active command and a second precharge command during a second time period; and
column pins configured to receive a first column command during the first time period, and receive a second column command during the second time period,
wherein during the first time period, the row pins are configured to receive the first active command during a first sub-period and receive the first precharge command during a second sub-period which starts at a timing corresponding to a rising edge of the clock signal after receiving the first active command, and the column pins are configured to receive the first column command during a third sub-period,
wherein during the second time period, the row pins are configured to receive the second active command during a fourth sub-period and receive the second precharge command during a fifth sub-period which starts at a timing corresponding to a falling edge of the clock signal after receiving the second active command, and the column pins are configured to receive the second column command during a sixth sub-period, and
wherein each of the first sub-period and the fourth sub-period corresponds to a first number of rising edges of the clock signal and a second number of falling edges of the clock signal, and the second number is different from the first number.
2. The memory device of claim 1 , wherein the first number is 2 and the second number is 1.
3. The memory device of claim 1 , wherein a first minimum time interval between the first active command and the first precharge command is different from a second minimum time interval between the second active command and the second precharge command.
4. The memory device of claim 3 , wherein the first minimum time interval is greater than the second minimum time interval by a half (0.5) cycle of the clock signal.
5. The memory device of claim 1 , wherein a number of row pins is 10 and a number of column pins is 8.
6. The memory device of claim 1 , wherein the memory device is configured to communicate with an external host device based on a high bandwidth memory (HBM) interface.
7. The memory device of claim 1 , wherein each of the first column command and the second column command is a read command or a write command.
8. The memory device of claim 1 , wherein a length of each of the second sub-period and the fifth sub-period is a half (0.5) cycle of the clock signal.
9. A memory controller comprising:
a clock pin configured to transmit a clock signal to a memory device;
row pins configured to transmit a first active command for the memory device and a first precharge command for the memory device during a first time period, and transmit a second active command for the memory device and a second precharge command for the memory device during a second time period; and
column pins configured to transmit a first column command for the memory device during the first time period, and transmit a second column command for the memory device during the second time period,
wherein during the first time period, the row pins are configured to transmit the first active command to the memory device during a first sub-period and transmit the first precharge command to the memory device during a second sub-period which starts at a timing corresponding to a rising edge of the clock signal after transmitting the first active command, and the column pins are configured to transmit the first column command to the memory device during a third sub-period, and
wherein during the second time period, the row pins are configured to transmit the second active command to the memory device during a fourth sub-period and transmit the second precharge command to the memory device during a fifth sub-period which starts at a timing corresponding to a falling edge of the clock signal after transmitting the second active command, and the column pins are configured to transmit the second column command to the memory device during a sixth sub-period, and
wherein each of the first sub-period and the fourth sub-period corresponds to a first number of rising edges of the clock signal and a second number of falling edges of the clock signal, and the second number is different from the first number.
10. The memory controller of claim 9 , wherein the first number is 2 and the second number is 1.
11. The memory controller of claim 9 , wherein a first minimum time interval between the first active command and the first precharge command is different from a second minimum time interval between the second active command and the second precharge command.
12. The memory controller of claim 11 , wherein the first minimum time interval is greater than the second minimum time interval by a half (0.5) cycle of the clock signal.
13. The memory controller of claim 9 , wherein each of the first column command and the second column command is a read command or a write command.
14. The memory controller of claim 9 , wherein a length of each of the second sub-period and the fifth sub-period is a half (0.5) cycle of the clock signal.
15. A memory system comprising:
a package substrate;
an interposer stacked on the package substrate;
a memory device stacked on the interposer, the memory device including a clock pin, row pins and column pins; and
a memory controller stacked on the interposer, the memory controller configured to transmit a first row command to the memory device during a first time period, transmit a second row command to the memory device during a second time period, and transmit a clock signal to the memory device,
wherein the interposer is configured to connect the memory device to the memory controller,
wherein the memory device is configured to decode the first row command received through the row pins during the first time period, and decode the second row command received through the row pins during the second time period,
wherein the first row command is transmitted during a first sub-period which starts at a timing corresponding to a rising edge of the clock signal,
wherein the second row command is transmitted during a second sub-period which starts at a timing corresponding to a falling edge of the clock signal, and
wherein the first row command corresponds to a first precharge command and the second row command corresponds to a second precharge command.
16. The memory system of claim 15 , wherein during the first time period, the memory device is configured to receive a first active command through the row pins during a third sub-period, and receive the first precharge command during the first sub-period after receiving the first active command, and
wherein during the second time period, the memory device is configured to receive a second active command through the row pins during a fourth sub-period, and receive the second precharge command during the second sub-period after receiving the second active command,
wherein each of the third sub-period and the fourth sub-period corresponds to a first number of rising edges of the clock signal and a second number of falling edges of the clock signal, and the second number is different from the first number.
17. The memory system of claim 16 , wherein during the first time period, the memory device is further configured to receive a first column command through the column pins during a fifth sub-period, and
wherein during the second time period, the memory device is further configured to receive a second column command through the column pins during a sixth sub-period.
18. The memory system of claim 16 , wherein the first number is 2 and the second number is 1.
19. The memory system of claim 17 , wherein each of the first column command and the second column command is a read command or a write command.
20. The memory system of claim 15 , wherein a length of each of the first sub-period and the second sub-period is a half (0.5) cycle of the clock signal.