Signal control circuit, signal control method for blocking activation operations and semiconductor memory
A signal control circuit includes: a generating circuit configured to accumulate execution times of an activation operation and output a block signal in response to an accumulated value being greater than or equal to a first preset value; and a logic circuit configured to receive an activation operation signal and the block signal, block outputting of the activation operation signal in response to receiving the block signal, and output the activation operation signal in response to not receiving the block signal.
1. A signal control circuit, comprising:
a generating circuit, configured to accumulate execution times of an activation operation, and output a block signal in response to an accumulated value being greater than or equal to a first preset value; and
a logic circuit, configured to receive an activation operation signal and the block signal, block outputting of the activation operation signal in response to receiving the block signal, and output the activation operation signal in response to not receiving the block signal;
wherein the logic circuit comprises a NOT gate and an AND gate,
wherein the NOT gate is configured to perform NOT operation on the block signal to obtain an inverted block signal; and
the AND gate is configured to perform AND operation on the inverted block signal and the activation operation signal, and block or output the activation operation signal according to an operation result.
2. The signal control circuit of claim 1 , wherein the generating circuit is further configured to:
receive a periodic refresh signal, a refresh management signal, or the activation operation signal outputted by the logic circuit; and
increment the accumulated value by one in response to receiving the activation operation signal; decrement the accumulated value by a second preset value in response to receiving the periodic refresh signal; and decrement the accumulated value by a third preset value in response to receiving the refresh management signal.
3. The signal control circuit of claim 2 , wherein the generating circuit comprises a calculation circuit, a latch circuit, and a comparison circuit,
wherein the calculation circuit is configured to perform arithmetic processing on the accumulated value to obtain a first arithmetic value, a second arithmetic value and a third arithmetic value;
the latch circuit is configured to receive the activation operation signal, the periodic refresh signal or the refresh management signal, and update the accumulated value based on the first arithmetic value corresponding to the activation operation signal, the second arithmetic value corresponding to the periodic refresh signal or the third arithmetic value corresponding to the refresh management signal, and the latch circuit is further configured to store an updated accumulated value; and
the comparison circuit is configured to compare the accumulated value with the first preset value, and output the block signal in response to the accumulated value being greater than or equal to the first preset value.
4. The signal control circuit of claim 2 , wherein the generating circuit comprises a calculation circuit, a latch circuit, and a comparison circuit,
wherein the calculation circuit is configured to perform arithmetic processing on the accumulated value based on the activation operation signal, the periodic refresh signal or the refresh management signal to obtain a target arithmetic value;
the latch circuit is configured to update the accumulated value by using the target arithmetic value and store an updated accumulated value; and
the comparison circuit is configured to compare the accumulated value with the first preset value, and output the block signal in response to the accumulated value being greater than or equal to the first preset value.
5. The signal control circuit of claim 2 , wherein the generating circuit comprises a calculation circuit, a latch circuit, and a comparison circuit,
the calculation circuit is configured to perform corresponding arithmetic processing on the accumulated value respectively based on the activation operation signal, the periodic refresh signal or the refresh management signal, to obtain a first arithmetic value corresponding to the activation operation signal, a second arithmetic value corresponding to the periodic refresh signal or a third arithmetic value corresponding to the refresh management signal;
the latch circuit is configured to receive the activation operation signal, the periodic refresh signal or the refresh management signal, update the accumulated value by using the first arithmetic value in response to receiving the activation operation signal, update the accumulated value by using the second arithmetic value in response to receiving the periodic refresh signal, and update the accumulated value by using the third arithmetic value in response to receiving the refresh management signal, and the latch circuit is further configured to store an updated accumulated value; and
the comparison circuit is configured to compare the accumulated value with the first preset value, and output the block signal in response to the accumulated value being greater than or equal to the first preset value.
6. The signal control circuit of claim 5 , wherein the calculation circuit comprises an addition circuit, a first subtraction circuit, and a second subtraction circuit, the addition circuit is configured to, in response to the calculation circuit receiving the activation operation signal outputted by the logic circuit, increment the accumulated value by one and output the first arithmetic value;
the first subtraction circuit is configured to, in response to the calculation circuit receiving the periodic refresh signal, perform subtraction processing between the accumulated value and the second preset value and output the second arithmetic value; and
the second subtraction circuit is configured to, in response to the calculation circuit receiving the refresh management signal, perform subtraction processing between the accumulated value and the third preset value and output the third arithmetic value.
7. The signal control circuit of claim 6 , wherein the latch circuit comprises a first output control circuit, a second output control circuit, a third output control circuit and a latch,
wherein the first output control circuit is configured to determine the first arithmetic value as the accumulated value in response to the latch circuit receiving the activation operation signal outputted by the logic circuit, wherein the first output control circuit has a control terminal connected to an output terminal of the logic circuit, an input terminal connected to an output terminal of the addition circuit, and an output terminal connected to an input terminal of the latch;
the second output control circuit is configured to determine the second arithmetic value as the accumulated value in response to the latch circuit receiving the periodic refresh signal, wherein the second output control circuit has a control terminal configured to receive the periodic refresh signal, an input terminal connected to an output terminal of the first subtraction circuit, and an output terminal connected to the input terminal of the latch;
the third output control circuit is configured to determine the third arithmetic value as the accumulated value in response to the latch circuit receiving the refresh management signal, wherein the third output control circuit has a control terminal configured to receive the refresh management signal, an input terminal connected to an output terminal of the second subtraction circuit, and an output terminal connected to the input terminal of the latch; and
an output terminal of the latch is configured to output the accumulated value.
8. The signal control circuit of claim 2 , further comprising:
a decoding circuit, configured to receive a signal to be processed, decode the signal to be processed, and output the activation operation signal, the periodic refresh signal or the refresh management signal accordingly.
9. A semiconductor memory, comprising the signal control circuit of claim 1 .
10. A signal control circuit, comprising:
a generating circuit, configured to accumulate execution times of an activation operation, and output a block signal in response to an accumulated value being greater than or equal to a first preset value; and
a logic circuit, configured to receive an activation operation signal and the block signal, block outputting of the activation operation signal in response to receiving the block signal, and output the activation operation signal in response to not receiving the block signal;
wherein the generating circuit is further configured to:
receive a periodic refresh signal, a refresh management signal, or the activation operation signal outputted by the logic circuit; and
increment the accumulated value by one in response to receiving the activation operation signal; decrement the accumulated value by a second preset value in response to receiving the periodic refresh signal; and decrement the accumulated value by a third preset value in response to receiving the refresh management signal;
wherein the first preset value is n times larger than the second preset value, n being greater than 1; and the third preset value is m larger than the second preset value, m being greater than or equal to 1.
11. The signal control circuit of claim 10 , further comprising:
a mode register, configured to receive a mode selection signal, and determine a first opcode, a second opcode and a third opcode according to the mode selection signal, wherein the first opcode is used for indicating a multiple relationship between the first preset value and the second preset value, the second opcode is used for indicating a value of the second preset value, and the third opcode is used for indicating a multiple relationship between the third preset value and the second preset value,
wherein the generating circuit is further configured to receive the first opcode, the second opcode and the third opcode, determine the second preset value according to the second opcode, determine the first preset value according to the first opcode and the second opcode, and determine the third preset value according to the third opcode and the second opcode.
12. A semiconductor memory, comprising the signal control circuit of claim 10 .
13. A signal control method, comprising:
receiving an activation operation signal; and
accumulating execution times of an activation operation to determine an accumulated value, blocking outputting of the activation operation signal in response to the accumulated value being greater than or equal to a first preset value, and outputting the activation operation signal in response to the accumulated value being smaller than the first preset value;
wherein blocking the outputting of the activation operation signal in response to the accumulated value being greater than or equal to the first preset value comprises:
comparing the accumulated value with the first preset value, and outputting the block signal in response to the accumulated value being greater than or equal to the first preset value; and
performing logical operation on the block signal and the activation operation signal, and blocking the activation operation signal according to an operation result.
14. The signal control method of claim 13 , wherein accumulating the execution times of the activation operation to determine the accumulated value comprises:
receiving a periodic refresh signal, a refresh management signal, or an outputted activation operation signal; and
incrementing the accumulated value by one in response to receiving the outputted activation operation signal, decrementing the accumulated value by a second preset value in response to receiving the periodic refresh signal, and decrementing the accumulated value by a third preset value in response to receiving the refresh management signal.
15. The signal control method of claim 14 , wherein receiving the activation operation signal comprises:
receiving a signal to be processed; and
decoding the signal to be processed to obtain the activation operation signal, the periodic refresh signal or the refresh management signal accordingly.
16. The signal control method of claim 13 , wherein performing the logical operation on the block signal and the activation operation signal to implement blocking of the activation operation signal comprises:
performing NOT operation on the block signal to obtain an inverted block signal; and
performing AND operation on the inverted block signal and the activation operation signal and blocking the activation operation signal according to an operation result, or performing AND operation on the inverted block signal and the activation operation signal and outputting the activation operation signal according to the operation result.