Size And Pin Definition - Ebyte E78-400M22S User Manual

Chengdu Ebyte Electronic Technology Co.,Ltd
Antenna
IC
FLASH
RAM
Core

Size and pin definition

3.
No.
1
2
3
4
5
6 I2C_SDA
7 I2C_SCL
8 UART_CTS
9 UART_RTS
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IPEX/Stamp hole
ASR6501
128KB
16KB
Cortex-M0
Name Direction
GND
VCC
SETB Input/output
DIO1 Input/output
Input/output
BUSY
Input/output
Input/output
Input/output
Input/output
50 ohm impedance
Ground wire, connected to the power reference ground
Power supply, range 2.5-3.7v (external ceramic filter capacitor is
recommended)
Ground wire, connected to the power reference ground
Multipurpose digital IO cannot be used as external GPIO
SPI busy indicator that cannot be used as an external GPIO
I2C SCL pins
I2C SDA pin
UART CTS pin
UART RTS pin
E78-400M22S user manual
Function
4