Latency control circuit and method of controlling latency

摘要

A latency control circuit includes: a delay locked loop (DLL) configured to generate a DLL clock signal by delaying a clock signal by a delay time varied according to any one of dual locking points, and generate a loop change signal according to a locking point change; a control unit configured to generate a latency control signal in response to a reset signal, a delay signal generated by delaying the reset signal by a first delay time, and the loop change signal; and a latency signal generation unit configured to adjust a latency of a command signal in response to the latency control signal and output a latency signal.

主权项

1. A latency control circuit comprising:
a delay locked loop (DLL) configured to generate a DLL clock signal by delaying a clock signal with a delay time varied according to one of dual locking points, and generates a loop change signal according to a locking point change between the dual locking points; a control unit configured to generate a latency control signal in response to a reset signal, a delay signal generated by delaying the reset signal by a first delay time, and the loop change signal; and a latency signal generation unit configured to adjust a latency of a command signal in response to the latency control signal and output a latency signal.