Details

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BUY MCP23017-E/ML https://www.utsource.net/itm/p/12610118.html

Parameter	Description	Value/Range
Package Type	Package style	28-SOIC (Small Outline Integrated Circuit)
Operating Voltage	Supply voltage range	1.8V to 5.5V
I2C Interface	Communication interface type	I2C compatible, supports standard and fast modes
Input/Output Ports	Number of configurable GPIOs	16-bit (divided into two 8-bit ports: GPA and GPB)
Interrupt Capability	Ability to generate interrupts	Yes, with individual or mirrored interrupt output pins
Internal Pull-ups	Internal pull-up resistors	Configurable per port pin
Open-Drain Outputs	Output configuration options	Configurable as open-drain for each port pin
Operating Temperature	Range of temperatures where device can operate reliably	-40掳C to +85掳C
Storage Temperature	Range of temperatures where device can be stored without damage	-65掳C to +150掳C
Data Rate	Maximum data transfer rate	Up to 400 kbps (fast mode)
Power Consumption	Typical current consumption	1.5 渭A (standby), 2.8 mA (active)

Instructions for Use:

1. Power Supply Connection:

   • Connect VDD to the positive supply voltage (1.8V to 5.5V).
   • Connect VSS to ground.

2. I2C Bus Configuration:

   • Connect SDA and SCL to the I2C bus lines.
   • Ensure appropriate pull-up resistors are connected to SDA and SCL lines.

3. Address Setting:

   • Set the device address using A0, A1, and A2 pins. These pins can be tied to VSS or VDD to set the I2C address.

4. Initialization:

   • Initialize the MCP23017 by configuring the IODIRA/B registers to set the direction of the GPIO pins (input or output).

5. GPIO Configuration:

   • Use GPPUA/B registers to enable internal pull-up resistors for input pins.
   • Configure GPIO pins as inputs or outputs via the IODIRA/B registers.

6. Reading/Writing Data:

   • Write data to the GPIOA/B registers to control output states.
   • Read data from the GPIOA/B registers to get the state of input pins.

7. Interrupt Handling:

   • Configure the INTCONA/B registers to set the interrupt-on-change behavior.
   • Use the INTFA/B registers to check which pins triggered an interrupt.
   • Interrupts can be configured to trigger on any change or match a specific value.

8. Shutdown Mode:

   • The device does not have a dedicated shutdown pin; low power consumption is achieved through careful management of active states.

9. Handling Electrostatic Discharge (ESD):

   • Follow proper handling procedures to prevent ESD damage during assembly and testing.

(For reference only)