diff --git a/app/src/ads1293_simple_tester.c b/app/src/ads1293_simple_tester.c
index 20144f4..e0cc6c7 100644
--- a/app/src/ads1293_simple_tester.c
+++ b/app/src/ads1293_simple_tester.c
@@ -335,7 +335,7 @@ void setup() {
     ZERROR_CHECK(nrfx_gpiote_init());
     nrf_drv_gpiote_in_config_t inConfig = GPIOTE_CONFIG_IN_SENSE_TOGGLE(false);  // 双边沿中断触发
     inConfig.pull                       = NRF_GPIO_PIN_PULLUP;                   // 默认上拉
-    inConfig.sense                      = NRF_GPIOTE_POLARITY_LOTOHI;            // 上升沿触发
+    inConfig.sense                      = NRF_GPIOTE_POLARITY_HITOLO;            // 下降沿触发
     ZERROR_CHECK(nrfx_gpiote_in_init(ADS1293_READY_PIN, &inConfig, ads1293_ready_pin_irq));
     nrfx_gpiote_in_event_enable(ADS1293_READY_PIN, true);
   }