KAmodPCAL6408 is a module with the PCAL6408A chip from NXP. The module has 8 programmable inputs / outputs and is controlled by the I2C bus. Thanks to the programmable outputs of the interrupt generator, it is possible, for example, to wake up the microcontroller after detecting a change in the input state. The board is equipped with a standard Pmod connector and a KAMAMI connector, allowing for easy attachment of the module to development kits. Thanks to its small dimensions, the product can be used in many development projects, while the Pmod straight-through connector allows you to connect boards in rows.

KAmodPCAL6408 modul.png
Basic Features and Parameters
  • NXP PCAL6408A chip
    • 8 programmable inputs / outputs
    • I2C bus
    • Programmable interrupt output
    • System address selectable (0x20 or 0x21)
  • Pass-through connector compatible with the Pmod standard, allows for serial connection of Pmod I2C modules
  • Connector compatible with the KAMAMI standard
  • Built-in pull-up jumpers on the I2C bus lines
  • Built-in jumper for connecting INT line of the system to INT line of Pmod connectors
  • Built-in I2C address selector
  • Possibility to power supply with voltage in the range 1.7-5.5 V through the Pmod connector and 1.8-5.5 V through the KAMAMI connector
  • Mounting holes with a diameter of 2.5 mm
  • Dimensions: 61.2 x 20.3 x 10 mm
Standard Equipment
Code Description
  • Assembled and running module
Electronic Schematics
KAmodPCAL6408 schemat.png
Pinout description - Pmod standard straight connector
KAmodPCAL6408 obrys zlacze.png
JP1 (male connector) JP2 (female connector) I2C
VDD VDD Module power supply (max. 3.6 V)
SDA SDA The data line of the I2C bus
SCL SCL I2C bus clock line
INT INT INT2 breakline
Pinout description - KAMAMI standard connector
KAmodLIS35DE obrys zlacza kamami.png
Contact number I2C
1 (VCC) Module power supply (max. 5.5 V)
2 (SCL) I2C bus clock line
3 (SDA) The data line of the I2C bus
4 (GND) Power ground
I2C bus lines

The KAmodPCAL6408 module is equipped with jumpers that allow to connect the pull-up resistors to the positive power supply pole to the I2C bus line. Jumpers make it possible to independently turn on the pull-up for SDA and SCL lines.

KAmodPCAL6408 obrys i2c.png
I2C bus address

The KAmodPCAL6408 module is equipped with a jumper that allows you to change the address of the I2C bus. The jumper enables the address to be switched between 0x20 and 0x21.

KAmodPCAL6408 obrys adres.png
INT interrupt line

The KAmodPCAL6408 module has a jumper for connecting the INT interrupt output line to a connector compatible with the Pmod standard. Thanks to the possibility of disconnecting the KAmodLIS35DE interrupt line from the Pmod connectors, the user does not have to worry about the consequences of possible conflicts resulting from connecting modules compatible with Pmod with different logical states.

KAmodPCAL6408 obrys int.png
Supply voltage jumper

The KAmodPCAL6408 module has a jumper that allows the module to be powered with the voltage supplied to the KAMAMI connector, omitting the 3.3V stabilizer. To configure the module this way the ZW1 jumper located next to the stabilizer should be soldered.

KAmodPCAL6408 obrys zw1.png

External Links