diff --git a/docs/API_reference/en/peripherals/machine.UART.md b/docs/API_reference/en/peripherals/machine.UART.md
index 86aee13975a363fcbd9872d1979bb93519af75fa..72a7d8f6df4cb4322a55adc4264f7423a3695b21 100644
--- a/docs/API_reference/en/peripherals/machine.UART.md
+++ b/docs/API_reference/en/peripherals/machine.UART.md
@@ -34,7 +34,7 @@ class machine.UART(UART.UARTn, buadrate, databits, parity, stopbits, flowctl)
 | BG95M3        | UART0:<br />TX: pin23<br />RX: pin22<br />UART1:<br />TX: pin27<br />RX: pin28<br />UART2:<br />TX: pin64<br />RX: pin65 |
 | EC600M        | UART0:<br />TX: pin71<br />RX: pin72<br />UART1 (flowctl = 0):<br />TX: pin3<br />RX: pin2<br />UART1 (flowctl = 1):<br />TX: pin33<br />RX: pin34<br />UART2:<br />TX: pin32<br />RX: pin31 |
 | EG915U        | UART1:<br />TX: pin27<br />RX: pin28<br />UART2:<br />TX: pin35<br />RX: pin34<br/>UART4:<br/>TX: pin19<br/>RX: pin18 |
-| EC800M        | UART0:<br />TX: pin39<br />RX: pin38<br />UART1(flowctl = 0):<br />TX: pin50<br />RX: pin51<br />UART1(flowctl = 1):<br />TX: pin22<br />RX: pin23<br />Note: UART1 is unavailable for EC800M-CN_GA module. <br />UART2:<br />TX: pin18<br />RX: pin17 |
+| EC800M        | UART0:<br />TX: pin39<br />RX: pin38<br />UART1(flowctl = 0):<br />TX: pin50<br />RX: pin51<br />UART1(flowctl = 1):<br />TX: pin22<br />RX: pin23<br />Note: UART1 is unavailable for EC800MCNGA / EG810MCNGA module. <br />UART2:<br />TX: pin18<br />RX: pin17 |
 | EG912N        | UART0:<br />TX: pin23<br />RX: pin22<br />UART1 (flowctl = 0):<br />TX: pin27<br />RX: pin28<br/>UART1 (flowctl = 1):<br />TX: pin36<br />RX: pin37<br />UART2:<br />TX: pin34<br />RX: pin35 |
 
 > When UART1 of EC600M/EC800M/EG912N series module is in flowctl = 1 state, modules only map UART1 to different pins but flow control is not enabled.
diff --git a/docs/API_reference/zh/peripherals/machine.UART.md b/docs/API_reference/zh/peripherals/machine.UART.md
index 00102d611f2ab3feb31abbc6c0a56aee77d57546..e1f2cf956e165dc21cb98dd3f7efb8178cc7ed66 100644
--- a/docs/API_reference/zh/peripherals/machine.UART.md
+++ b/docs/API_reference/zh/peripherals/machine.UART.md
@@ -34,7 +34,7 @@ class machine.UART(UART.UARTn, baudrate, databits, parity, stopbits, flowctl)
 | BG95M3        | uart0:<br />TX: 引脚号23<br />RX: 引脚号22<br />uart1:<br />TX:引脚号27<br />RX:引脚号28<br />uart2:<br />TX: 引脚号64<br />RX: 引脚号65<br />uart4:<br/>TX:引脚号35<br />RX:引脚号34 |
 | EC600M        | uart0:<br />TX: 引脚号71<br />RX: 引脚号72<br />uart1(flowctl = 0):<br />TX: 引脚号3<br />RX: 引脚号2<br />uart1(flowctl = 1):<br />TX: 引脚号33<br />RX: 引脚号34<br />uart2:<br />TX:引脚号32<br />RX:引脚号31 |
 | EG915U        | uart1:<br />TX: 引脚号27<br />RX: 引脚号28<br />uart2:<br />TX:引脚号35<br />RX:引脚号34<br/>uart4:<br/>TX:引脚号19<br/>RX:引脚号18 |
-| EC800M/EG810M | uart0:<br />TX: 引脚号39<br />RX: 引脚号38<br />uart1(flowctl = 0):<br />TX: 引脚号50<br />RX: 引脚号51<br />uart1(flowctl = 1):<br />TX: 引脚号22<br />RX: 引脚号23<br />注意:EC800M/EG810MCN_GA uart1不可用<br />uart2:<br />TX:引脚号18<br />RX:引脚号17 |
+| EC800M/EG810M | uart0:<br />TX: 引脚号39<br />RX: 引脚号38<br />uart1(flowctl = 0):<br />TX: 引脚号50<br />RX: 引脚号51<br />uart1(flowctl = 1):<br />TX: 引脚号22<br />RX: 引脚号23<br />注意：EC800MCNGA / EG810MCNGA 模块的 uart1 不可用<br />uart2:<br />TX:引脚号18<br />RX:引脚号17 |
 | EG912N        | uart0:<br />TX: 引脚号23<br />RX: 引脚号22<br />uart1(flowctl = 0):<br />TX: 引脚号27<br />RX: 引脚号28<br/>uart1(flowctl = 1):<br />TX: 引脚号36<br />RX: 引脚号37<br />uart2:<br />TX:引脚号34<br />RX:引脚号35 |
 | EC600E        | uart0:<br />TX: 引脚号71<br />RX: 引脚号72<br />uart1:<br />TX:引脚号70<br />RX:引脚号69<br />uart2:<br />TX:引脚号32<br />RX:引脚号31 |
 | EC800E        | uart0:<br />TX: 引脚号39<br />RX: 引脚号38<br />uart1:<br />TX:引脚号29<br />RX:引脚号28<br />uart2:<br />TX:引脚号18<br />RX:引脚号17 |