Chengdu Ebyte Electronic Technology Co., Ltd.
E104-BT54 User manual
Copyright ©2012–2021，Chengdu Ebyte Electronic Technology Co.,Ltd.
5
3.Size and pin definition
Figure 3-1 Mechanical size and pin definition
Table 3-1 Pin definition table
Pin No.
Pin Name
Pin direction
Description
1
GND
S
Ground wire, connected to the power reference ground;
2
PA0
I/O
MCU GPIO, please refer to the chip user manual for details;
3
PA1
I/O
MCU GPIO, please refer to the chip user manual for details;
4
PA2/SWDIO
I/O
MCU GPIO, please refer to the chip user manual for details;
5
PA3/SWCLK
I/O
MCU GPIO, please refer to the chip user manual for details;
6
PA4/LPUART
TX
I/O
MCU GPIO, please refer to the chip user manual for details;
7
PA5/LPUART
RX
I/O
MCU GPIO, please refer to the chip user manual for details;
8
PA6
I/O
MCU GPIO, please refer to the chip user manual for details;
9
PA7
I/O
MCU GPIO, please refer to the chip user manual for details;
10
PB15
I/O
MCU GPIO, please refer to the chip user manual for details;