
WIRELESS CONNECTIVITY & SENSORS
User manual Proteus-II
3
Input
Serial wire clock. Uses internal pull down re-
sistor. Do not connect if not needed.
4
Input
Serial wire input/output. Uses internal pull up
resistor. Do not connect if not needed.
5
P0.21
Input
Reset pin. A low signal resets the module.
Uses internal pull up resistor.
6
P0.05/AIN3
Input
Boot pin. A low signal during and short af-
ter reset starts the module in OTA bootloader
mode. Uses internal pull up resistor
1
. Do not
connect if not needed.
7
Supply Supply voltage
8
P0.10/NFC2
2
Input
Operation mode pin with internal pull down re-
sistor
1
during start-up. Low level or open: Nor-
mal Mode. High level: Peripheral only Mode.
Do not connect if not needed.
9
P0.09/NFC1
2
Output
Indicates if module is busy with data transmis-
sion. See section
to check how to use
this pin in Peripheral only Mode. In Command
mode this pin must not be respected. Do not
connect, if not needed.
10
P0.00/XL1
2
Output
Indicates the module state (active high). Do
not connect if not needed.
11
P0.01/XL2
2
Output
Indicates the module state (active high). Do
not connect if not needed.
12
P0.02/AIN0
Output
UART(Transmission)
13
P0.03/AIN1
Input
UART (Reception). Uses internal pull up re-
sistor
1
.
14
P0.04/AIN2
Output
Only used if flow control is enabled. Do not
connect if not needed.
15
P0.28/AIN4
Input
Only used if flow control is enabled. Do not
connect if not needed.
16
P0.29/AIN5
Input
Wake-up will allow leaving the system-off
mode or re-enabling the UART. Uses internal
pull up resistor
1
. Do not connect if not needed.
17
Supply Ground
Table 10: Pinout
1
Internal pull ups or pull downs are configured at start-up by the firmware installed in the SoC.
2
Pins for NFC and external crystal are only available in custom firmware.
Order code 2608011x24010
26
Version 1.11 , July 2022