imp004m Breakout
The imp004m breakout board provides the imp004m module with a power supply, GPIO breakout, an optional 32kHz crystal and required SPI flash.
Note Images may not represent the current version of the design.
Purchase
This product is available to purchase from Mouser and Digikey.
Set Up
To set up an imp004m Breakout Board, please see this page.
Pinout Chart
Click for larger version
Hardware Details
Bluetooth LE
The imp004m’s WiFi chip is the Cypress Semiconductor CYW43438 communication chip, which also supports Bluetooth 4.1. The CYW43438 Bluetooth unit is not connected to the imp004m’s MCU, but the CYW43438’s Bluetooth-specific pins are brought out to the imp004m pin-out to make them accessible to hardware designers who wish to make use of the module’s Bluetooth features in their products. They are connected to the imp004m Breakout Board as follows:
| imp004m GPIO Pin | CYW43438 Pin | Notes |
|---|---|---|
| hardware.pinE | LPO_IN | Drive low |
| hardware.pinF | BT_UART_RX | Access via hardware.uartFGJH |
| hardware.pinG | BT_UART_TX | Access via hardware.uartFGJH |
| hardware.pinJ | BT_REG_ON | Drive high to enable the Bluetooth LE sub-system |
The following code example will enable the Bluetooth LE on the Breakout Board:
// Set up Bluetooth on the imp004m Breakout Board
// Alias the relevant UART bus, LPO and power-on pins
bt_uart <- hardware.uartFGJH;
bt_lpo_in <- hardware.pinE;
bt_reg_on <- hardware.pinJ;
// Boot up Bluetooth: ground LPO_IN and set BT_REG_ON to High
bt_lpo_in.configure(DIGITAL_OUT, 0);
bt_reg_on.configure(DIGITAL_OUT, 1);
After making use of Bluetooth, you should set CYW43438 pins BT_REG_ON and LPO_IN low and if you wish to power down and fully disable the imp004m’s Bluetooth sub-system.
- For more detailed information on Bluetooth usage with the Breakout Board’s imp004m module, please see this guide.
Programming Resources
