diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral_main.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral_main.c
index 1d8858c..32abfc2 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral_main.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/peripheral_main.c
@@ -306,6 +306,13 @@ int main(void)
     PRINT("RST_REASON: 0x%08lx\n", (unsigned long)OFFLOG_RCC_RSTSCKR);
     PRINT("%s\n", VER_LIB);
     PRINT("SystemCoreClock:%d\n", SystemCoreClock);
+    /* ===== 实验: 禁用全部 Flash/SPI 操作 (2026-08-12) =====
+       目的: 验证 SPI 操作是否触发复位循环 (UART2 隔离后依旧复位+乱码,
+             乱码紧跟 offlog_boot 的 SPI 写, 疑似 SPI 信号串扰 NRST/调试线)
+       #if 1 = 跳过全部 SPI; 通过后改 0 或删除本块恢复 */
+#if 1
+    PRINT("ISOLATE: flash/SPI disabled (flash isolation test)\n");
+#else
     GetMacAddr(gMacAddr);
     storage_init();
     PRINT("INIT: storage ok\n");
@@ -324,6 +331,7 @@ int main(void)
 
     load_cfg_from_flash();
     output_cfg_from_flash();
+#endif
 
     PRINT("MAC: %02X %02X %02X %02X %02X %02X\r\n", gMacAddr[0],gMacAddr[1], gMacAddr[2], gMacAddr[3],gMacAddr[4],gMacAddr[5]);
     PRINT("net version:%x\n", WCHNET_GetVer());