User's Manual

Bluetooth Low Energy Module
Shanghai Ehong Technologies Co., Ltd
CK/PWM5/ANA_B(
7)
28
Digital I/O
I2C_CLK/PWM5
inverting/GPIO/ANA_B7
NC
29
NC NC
GND
30
Ground Ground
Table 6：PIN
Terminal Description
Note:
A. UART_TX > PIN13 and PIN25 are the same PIN and feature.
B. UART_RX>PIN14 and PIN26 are the same PIN and feature.
C. UART_RTS>PIN15 and PIN23 are the same PIN and feature.
D. UART_CTS>PIN16 and PIN24 are the same PIN and feature
6. Physical Interfaces
6.1. Power Supply
- The module power supply 3v coin cell batteries or DC 3.3v
- Power supply pin connection capacitor to chip and pin as far as possible close
- Capacitor decouples power to the chip
- Capacitor prevents noise coupling back to power plane.
-
Figure 2： Power Supply PCB Design
6.2. PIO
14 PIOs are provided . They are powered from VDD.PIO lines are software-configurable
as weak pull-up, weak pull-down, strong pull-up or strong pull-down.
Note:
At reset all PIO lines are inputs with weak pull-downs.