Expand 8 Click Board™

MIKROE-4442
Regular price
£15.40
Sale price
£15.40
Regular price
£22.00
Sold out
Unit price
Quantity must be 1 or more

How Does the Expand 8 Click Board™ work?

The Expand 8 Click Board™ as its foundation uses the MAX7317, a general-purpose input/output (GPIO) peripheral from Maxim Integrated that provides 10 I/O ports, P0 to P9, controlled through a high-speed SPI-compatible serial interface. Each port, P0 to P9 can be configured as open-drain, current-sink outputs rated at 20mA maximum, or as CMOS inputs, or as open-drain outputs. Loads should be connected to a supply voltage no higher than 7V.

The MAX7317 contains ten 8-bit internal registers. These ten registers are addressed as 0x00 - 0x09 control an I/O port each. Write 0x00 to the output register to set the port as a logic-low output, or 0x01 to set the port as a logic-high output or logic input.

Expand 8 Click communicates with MCU through a 16-bit 4-wire serial interface compatible with standard SPI, QSPI™, MICROWIRE™ guaranteed to operate at 35Mbps on its 3.3V power supply. During the Power-Up sequence, all control registers of the MAX7317 are in a reset state. Power-Up status sets I/O ports, P0 to P9, into a high impedance state and puts the device into Shutdown mode. The I/O ports P0–P9 remains high impedance with up to 8V asserted on them when the MAX7317 is powered down. Therefore, it can be used in hot-swap applications.

This Click board™ can be operated only with a 3.3V logic voltage level. The board must perform appropriate logic voltage level conversion before use with MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used, as a reference, for further development.

SPECIFICATIONS

Type Port expander
Applications Intended for use as a port expander in system monitoring applications, industrial controllers, portable equipment, and many more.
On-board modules MAX7317 - 10-Port SPI-interfaced I/O expander with overvoltage and hot-insertion protection from Maxim Integrated
Key Features 10-Port I/O expander, overvoltage protection, support hot-insertion, SPI, QSPI™, MICROWIRE™ compatible serial interface, low power consumption, and more.
Interface SPI
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)
Input Voltage 3.3V

PINOUT DIAGRAM

This table shows how the pinout on Expand 8 Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Pin Notes
NC 1 AN PWM 16 NC
NC 2 RST INT 15 NC
SPI Chip Select CS 3 CS RX 14 NC
SPI Clock SCK 4 SCK TX 13 NC
SPI Data OUT SDO 5 MISO SCL 12 NC
SPI Data IN SDI 6 MOSI SDA 11 NC
Power Supply 3.3V 7 3.3V 5V 10 NC
Ground GND 8 GND GND 9 GND Ground

ONBOARD SETTINGS AND INDICATORS

Label Name Default Description
LD1 PWR - Power LED Indicator
J1-J2 P0-P9 Populated I/O Expander Port

EXPAND 8 CLICK ELECTRICAL SPECIFICATIONS

Description Min Typ Max Unit
Supply Voltage - 3.3 - V
Output Load Voltage P0 - P9 - - 7 V
Maximum Output Current - - 20 mA
Operating Temperature Range -40 +25 +125 °C

Go to full site