diff --git a/zh-cn/device-dev/porting/porting-dayu200-on_standard-demo.md b/zh-cn/device-dev/porting/porting-dayu200-on_standard-demo.md
index 3f28ae2eb22a77ec9e744d55127a12340b6f6d7d..d5629c54112b19d9bc6f8aa8692fa9bbd94e0435 100755
--- a/zh-cn/device-dev/porting/porting-dayu200-on_standard-demo.md
+++ b/zh-cn/device-dev/porting/porting-dayu200-on_standard-demo.md
@@ -2448,7 +2448,7 @@ root {
         pwmBacklightConfig {
             match_attr = "pwm_bl_dev";
             pwmDevNum = 1;
-            pwmMaxPeroid = 25000;
+            pwmMaxPeriod = 25000;
             backlightDevName = "hdf_pwm";
             minBrightness = 0;
             defBrightness = 127;