IO Mapping

The nXPico W exposes an IO e WiFi module (ModuleId 1704) under the device node: the same channel set as nXPico, on the same GPIOs, plus the WiFi configuration parameters described in WiFi Configuration.

Digital Inputs

Channel	Parameter ID	Type	GPIO	Default mapping
Input 0	1000	BIT	GP2	IN0
Input 1	1001	BIT	GP3	IN1
Input 2	1002	BIT	GP6	IN2
Input 3	1003	BIT	GP7	IN3
Input 4	1004	BIT	GP20	IN4
Input 5	1005	BIT	GP21	IN5
Input 6	1006	BIT	GP22	IN6

Digital Outputs

Channel	Parameter ID	Type	GPIO	Default mapping
Output 0	2000	BIT	GP10	OUT0
Output 1	2001	BIT	GP11	OUT1
Output 2	2002	BIT	GP8	OUT2
Output 3	2003	BIT	GP9	OUT3
Output 4	2004	BIT	GP14	OUT4
Output 5	2005	BIT	GP15	OUT5

Analog Inputs

12-bit ADC, raw value 0…4095 over 0…3.3 V.

Channel	Parameter ID	Type	GPIO	ADC	Default mapping
Analog 0	3000	WORD	GP26	ADC0	AN0
Analog 1	3001	WORD	GP27	ADC1	AN1
Analog 2	3002	WORD	GP28	ADC2	AN2

PWM outputs

The six digital outputs can be driven as PWM outputs at runtime, exactly as on nXPico — same channels, same pins, same behaviour.

Channel	Parameter ID	Drives
PWM_ENABLE	9100	bit n = output n in PWM
PWM0…PWM5	9000‑9005	level 0…65535 of GP10, GP11, GP8, GP9, GP14, GP15

PWM_ENABLE := 2#0000_0100;   (* OUT2 becomes a PWM output *)
PWM2       := 32768;         (* 50% duty *)

The carrier frequency is a device parameter, one per pair of outputs: 9200 for OUT0/OUT1, 9201 for OUT2/OUT3, 9202 for OUT4/OUT5. Range 9 Hz…100 kHz, default 2289 Hz, and the duty stays 0…65535 whatever frequency you choose.

The LED cannot be dimmed here

nXPico W has no PWM_LED channel: its LED sits on the CYW43 wireless chip and is not a GPIO. On nXPico that channel exists.

The full explanation — resolution against frequency, why the pairs share a setting, how to measure it with a multimeter — is on the nXPico page.

Onboard LED

Channel	Parameter ID	Type	Default mapping
LED	4000	BIT (output)	LED

The LED is on the WiFi chip

On nXPico W the onboard LED is not a GPIO — it hangs off the CYW43 wireless chip. The runtime therefore applies it from its main loop rather than from the bus cycle, which adds a few milliseconds of latency. For precise timing, use a digital output.

System

Channel	Parameter ID	Type	Access	Default mapping
Temperature	5000	REAL (input)	read	TEMPERATURE
Vendor	393218	STRING	read-only	'nexo S.r.l.'
Model Name	393219	STRING	read-only	'IO'

“IO e WiFi” is the name of the node in the tree; the Model Name parameter is 'IO'.

WiFi parameters

Seven configuration parameters of the IO e WiFi module (IDs 6000–6006) set the SSID, password and IP configuration — see WiFi Configuration.

See ST Examples for sample code, and Serial Ports for the two UARTs available to the application.