1 Introduction

The SimpleLink™ CC3100 and CC3200 devices are Wi-Fi® and networking devices that provide a comprehensive networking solution for low-cost and low-power microcontrollers (MCU) using a thin driver and simple API set.

Each product with an embedded CC3100 or CC3200 device onboard must also have a serial flash device connected. The serial flash must be formatted, and at a minimum programmed with the Service Pack, which contains necessary software updates and additional features. For the CC3200, a binary image running on the internal MCU processor must also be programmed.

There are several options for serial flash programming, as follows:

• UniFlash – a PC-based utility offering image creation and programming. Content is programmed using the UART.
• Industrial flash programmer – flashes a complete image prepared with UniFlash directly to the serial flash. Can be applied when no SimpleLink device is attached to the serial flash. Content is programmed using the serial flash SPI lines.
• Over-the-air programming – the serial flash must be formatted in advance. Content is delivered through a network connection.

This application note describes in details additional options that leverage all the features UniFlash has to offer, but without the necessary connected PC. This option is referred to as Embedded Programming. To achieve embedded programming, bootloader protocol implemented over UART is described in detail.

The following sections describe the setup, bootloader protocol, and procedure of the embedded programming feature.