User's Manual

Ehong
®
Professional Bluetooth Solutions Provider page 8 of 18
P0.22
12
Digital IO
General purpose I/O pin
P0.23
13
Digital IO
General purpose I/O pin.
P0.24
14
Digital IO
General purpose I/O pin
P0.25
15
Digital IO
General purpose I/O pin
P0.29
16
Digital IO
General purpose I/O pin
VBAT
17
Power supply
Power supply 3.3V
GND
18
Ground
Ground
P0.30
19
Digital IO
General purpose I/O pin
P0.00
(AREF0)
20
Digital IO
Analog input
General purpose I/O pin
ADC/LPCOMP reference input 0
P0.03
(AIN4)
21
Digital IO
Analog input
General purpose I/O pin
ADC/LPCOMP reference input4
P0.04
(AIN5)
22
Digital IO
Analog input
General purpose I/O pin
ADC/LPCOMP reference input5
P0.05
(AIN6)
23
Digital IO
Analog input
General purpose I/O pin
ADC/LPCOMP reference input6
P0.06
(AIN7)
24
Digital IO
Analog input
General purpose I/O pin
General purpose I/O pin
ADC/LPCOMP reference input7
GND
25
Ground
Ground
P0.07
26
Digital IO
General purpose I/O pin
P0.08
27
Digital IO
General purpose I/O pin
P0.09
28
Digital IO
General purpose I/O pin
P0.10
29
Digital IO
General purpose I/O pin
P0.11
30
Digital IO
General purpose I/O pin
P0.12
31
Digital IO
General purpose I/O pin
P0.13
32
Digital IO
General purpose I/O pin
P0.14
33
Digital IO
General purpose I/O pin
P0.17
34
Digital IO
General purpose I/O pin
P0.18
35
Digital IO
General purpose I/O pin
GND
36
Ground
Ground
Table 5：PIN Terminal Description
Note: The module UARTs and I2C can be mapped any PIOs.
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.
- Support power on reset