diff --git a/docs/API_reference/en/peripherals/machine.SPI.md b/docs/API_reference/en/peripherals/machine.SPI.md
index fc17d28d6af11bbc392b8301c2bfea18eb705881..e2ebc7a9fa0bdf8f762ad335bc44e283c7890024 100644
--- a/docs/API_reference/en/peripherals/machine.SPI.md
+++ b/docs/API_reference/en/peripherals/machine.SPI.md
@@ -20,7 +20,7 @@ class machine.SPI(port, mode, clk, [group])
 
 > BC25 series module does not support SPI working mode of value 1 or 2. 
 >
-> parameter [group] only EC800M series module support。
+> The group parameter is supported only by the EC600M/EC800M/EG810M series. nor flash cannot be mounted if group = 1
 
 **Example:**
 
diff --git a/docs/API_reference/zh/peripherals/machine.SPI.md b/docs/API_reference/zh/peripherals/machine.SPI.md
index c29d0316e1fc316681b5d4ae1453d5b1e41d24b3..ca5195117ab260cd039f4e1046b9d9d60621799a 100644
--- a/docs/API_reference/zh/peripherals/machine.SPI.md
+++ b/docs/API_reference/zh/peripherals/machine.SPI.md
@@ -20,7 +20,7 @@ class machine.SPI(port, mode, clk, [group])
 
 > BC25PA平台不支持1、2模式。
 >
-> group参数目前仅EC600M/EC800M/EG810M系列支持。
+> group参数目前仅EC600M/EC800M/EG810M系列支持，group = 1 不支持挂载 nor flash
 
 **示例：**