M5Stack Extend I/O 2 Unit

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Product Link

M5Stack Extend I/O 2 Unithttps://x.com/openelabio

Description

EXT.IO2 is an IO extended unit, based on STM32F030 main controller, using I2C communication interface and providing 8 IO expansion. Each IO supports independent configuration of digital I/O, ADC, SERVO control, RGB LED control modes. Supports configuration of device I2C address, which means that users can mount multiple EXT.IO2 UNITs on the same I2C BUS to extend more IO resources. Suitable for multiple digital/analog signal acquisition, with lighting/servo control applications.

Features

• 8-channel input and output expansion.

  • Digital I/O

  • ADC input

  • SERVO control (PWM)

  • RGB LED control

• I2C communication interface:

  • Supports configuration of I2C address

Applications

• IO Expansion

• Servo Control

• Multiple lighting control

• Multiple analog signal acquisition

Specifications

Specifications	Parameters
MCU	STM32F030
I2C Address	0x45(default)
Number of IO extensions	8
IO interface PIN spacing	2.54mm
IOSupport Mode	Digital input/output, ADC, SERVO control, RGB LED control
IO Input/Output Level Support	3.3V
Net Weight	5g
Gross Weight	13g
Product Size	32*24*11mm
Package Size	93*138mm

Pin Mapping

M5Core(PORT A)	GPIO22	GPIO21	5V	GND
EXT.IO2 Unit	SCL	SDA	5V	GND

Schematics

Protocol

Communication protocols

MODE CONFIG

REG	DESC	LEN	R/W
0x00	MODE_CH_1	1 BYTE	R/W
0x01	MODE_CH_2	1 BYTE	R/W
0x02	MODE_CH_3	1 BYTE	R/W
0x03	MODE_CH_4	1 BYTE	R/W
0x04	MODE_CH_5	1 BYTE	R/W
0x05	MODE_CH_6	1 BYTE	R/W
0x06	MODE_CH_7	1 BYTE	R/W
0x07	MODE_CH_8	1 BYTE	R/W

• Value:

DIGITAL_INPUT_MODE=0 
DIGITAL_OUTPUT_MODE=1 
ADC_INPUT_MODE=2
SERVO_CTL_MODE=3 
RGB_LED_MODE=4
 

DIGITAL INPUT/OUTPUT

REG	DESC	LEN	R/W
0x10	OUTPUT_CTL_REG_CH_1	1 BYTE	W
0x11	OUTPUT_CTL_REG_CH_2	1 BYTE	W
0x12	OUTPUT_CTL_REG_CH_3	1 BYTE	W
0x13	OUTPUT_CTL_REG_CH_4	1 BYTE	W
0x14	OUTPUT_CTL_REG_CH_5	1 BYTE	W
0x15	OUTPUT_CTL_REG_CH_6	1 BYTE	W
0x16	OUTPUT_CTL_REG_CH_7	1 BYTE	W
0x17	OUTPUT_CTL_REG_CH_8	1 BYTE	W
0x20	DIGITAL_INPUT_REG_CH_1	1 BYTE	R
0x21	DIGITAL_INPUT_REG_CH_2	1 BYTE	R
0x22	DIGITAL_INPUT_REG_CH_3	1 BYTE	R
0x23	DIGITAL_INPUT_REG_CH_4	1 BYTE	R
0x24	DIGITAL_INPUT_REG_CH_5	1 BYTE	R
0x25	DIGITAL_INPUT_REG_CH_6	1 BYTE	R
0x26	DIGITAL_INPUT_REG_CH_7	1 BYTE	R
0x27	DIGITAL_INPUT_REG_CH_8	1 BYTE	R

• Value:

HIGH:1 / LOW:0
 

8B ANALOG INPUT

REG	DESC	LEN	R/W
0x30	ANALOG_INPUT_8B_REG_CH_1 Value: 0-255	1 BYTE	R
0x31	ANALOG_INPUT_8B_REG_CH_2 Value: 0-255	1 BYTE	R
0x32	ANALOG_INPUT_8B_REG_CH_3 Value: 0-255	1 BYTE	R
0x33	ANALOG_INPUT_8B_REG_CH_4 Value: 0-255	1 BYTE	R
0x34	ANALOG_INPUT_8B_REG_CH_5 Value: 0-255	1 BYTE	R
0x35	ANALOG_INPUT_8B_REG_CH_6 Value: 0-255	1 BYTE	R
0x36	ANALOG_INPUT_8B_REG_CH_7 Value: 0-255	1 BYTE	R
0x37	ANALOG_INPUT_8B_REG_CH_8 Value: 0-255	1 BYTE	R

12B ANALOG INPUT

REG	DESC	LEN	R/W
0x40	ANALOG_INPUT_12B_REG_CH_1 Value: 0-4095	2 BYTE	R
0x42	ANALOG_INPUT_12B_REG_CH_2 Value: 0-4095	2 BYTE	R
0x44	ANALOG_INPUT_12B_REG_CH_3 Value: 0-4095	2 BYTE	R
0x46	ANALOG_INPUT_12B_REG_CH_4 Value: 0-4095	2 BYTE	R
0x48	ANALOG_INPUT_12B_REG_CH_5 Value: 0-4095	2 BYTE	R
0x4A	ANALOG_INPUT_12B_REG_CH_6 Value: 0-4095	2 BYTE	R
0x4C	ANALOG_INPUT_12B_REG_CH_7 Value: 0-4095	2 BYTE	R
0x4E	ANALOG_INPUT_12B_REG_CH_8 Value: 0-4095	2 BYTE	R

SERVO ANGLE CTL

REG	DESC	LEN	R/W
0x50	SERVO_ANGLE_8B_REG_CH_1 Value: 0-180deg	1 BYTE	R/W
0x51	SERVO_ANGLE_8B_REG_CH_2 Value: 0-180deg	1 BYTE	R/W
0x52	SERVO_ANGLE_8B_REG_CH_3 Value: 0-180deg	1 BYTE	R/W
0x53	SERVO_ANGLE_8B_REG_CH_4 Value: 0-180deg	1 BYTE	R/W
0x54	SERVO_ANGLE_8B_REG_CH_5 Value: 0-180deg	1 BYTE	R/W
0x55	SERVO_ANGLE_8B_REG_CH_6 Value: 0-180deg	1 BYTE	R/W
0x56	SERVO_ANGLE_8B_REG_CH_7 Value: 0-180deg	1 BYTE	R/W
0x57	SERVO_ANGLE_8B_REG_CH_8 Value: 0-180deg	1 BYTE	R/W

SERVO PULSE CTL

REG	DESC	LEN	R/W
0x60	SERVO_PULSE_16B_REG_CH_1 Value: 500-2500us	2 BYTE	R/W
0x62	SERVO_PULSE_16B_REG_CH_2 Value: 500-2500us	2 BYTE	R/W
0x64	SERVO_PULSE_16B_REG_CH_3 Value: 500-2500us	2 BYTE	R/W
0x66	SERVO_PULSE_16B_REG_CH_4 Value: 500-2500us	2 BYTE	R/W
0x68	SERVO_PULSE_16B_REG_CH_5 Value: 500-2500us	2 BYTE	R/W
0x6A	SERVO_PULSE_16B_REG_CH_6 Value: 500-2500us	2 BYTE	R/W
0x6C	SERVO_PULSE_16B_REG_CH_7 Value: 500-2500us	2 BYTE	R/W
0x6E	SERVO_PULSE_16B_REG_CH_8 Value: 500-2500us	2 BYTE	R/W

RGB LED CTL

REG	DESC	LEN	R/W
0x70	RGB_24B_REG_CH_1：RGB 888	3 BYTE	R/W
0x73	RGB_24B_REG_CH_2：RGB 888	3 BYTE	R/W
0x76	RGB_24B_REG_CH_3：RGB 888	3 BYTE	R/W
0x79	RGB_24B_REG_CH_4：RGB 888	3 BYTE	R/W
0x7C	RGB_24B_REG_CH_5：RGB 888	3 BYTE	R/W
0x7F	RGB_24B_REG_CH_6：RGB 888	3 BYTE	R/W
0x82	RGB_24B_REG_CH_7：RGB 888	3 BYTE	R/W
0x85	RGB_24B_REG_CH_8：RGB 888	3 BYTE	R/W

Note: Do not write to the I2C address configuration register repeatedly at high frequency.

CONFIG

REG	DESC	LEN	R/W
0xFE	FW VERSION	1 BYTE	R
0xFF	I2C ADDR CONFIG (warn: Repeated writing may cause partition damage)	1 BYTE	R/W

Model Size

Compatible