diff --git a/xsync.cpp b/xsync.cpp
index 0f960fe..77e011d 100644
--- a/xsync.cpp
+++ b/xsync.cpp
@@ -869,5 +869,5 @@ xs_error_code_t Xsync::SysClock_setFreqDivision(uint32_t div) { return reg_write
 xs_error_code_t Xsync::SysClock_geFreqtDivision(uint32_t &div) { return _reg_read(reg::sys_clock_freq_division_ctrl, div); }
 xs_error_code_t Xsync::SysClock_setFreqMultiplication(uint32_t muti) { return reg_write(reg::sys_clock_freq_multiplication_ctrl, muti); }
 xs_error_code_t Xsync::SysClock_getFreqMultiplication(uint32_t &muti) { return _reg_read(reg::sys_clock_freq_multiplication_ctrl, muti); }
-xs_error_code_t Xsync::SysClock_readFreq(float &freq) { return readfreq(reg::sys_clock_outfreq_detect, freq); }
-xs_error_code_t Xsync::SysClock_readInputFreq(float &freq) { return readfreq(reg::sys_clock_infreq_detect, freq); }
\ No newline at end of file
+xs_error_code_t Xsync::SysClock_readOutSigFreq(float &freq) { return readfreq(reg::sys_clock_outfreq_detect, freq); }
+xs_error_code_t Xsync::SysClock_readInSigFreq(float &freq) { return readfreq(reg::sys_clock_infreq_detect, freq); }
\ No newline at end of file
diff --git a/xsync.hpp b/xsync.hpp
index 36aa754..6fedd42 100644
--- a/xsync.hpp
+++ b/xsync.hpp
@@ -520,14 +520,14 @@ class Xsync {
    * @param freq
    * @return xs_error_code_t
    */
-  xs_error_code_t SysClock_readFreq(float &freq);
+  xs_error_code_t SysClock_readOutSigFreq(float &freq);
   /**
    * @brief 读取系统时钟输入频率
    *
    * @param freq
    * @return xs_error_code_t
    */
-  xs_error_code_t SysClock_readInputFreq(float &freq);
+  xs_error_code_t SysClock_readInSigFreq(float &freq);
 
  private:
   xs_error_code_t doaction(uint32_t action, uint32_t actionval, uint32_t *ackreturn, int32_t overtime_ms = 100);