Hardware Feature Configuration; Microcontroller; Power Supply - Mediatek Labs LinkIt 7687 HDK V30 User Manual

4.

Hardware Feature Configuration

4.1.

Microcontroller

MT7687F features an ARM Cortex-M4 with floating point processor, which is the most energy efficient ARM
processor available.
MT7687F provides low power consumption embedded architecture and it's optimized for various types of
applications in home automation, smart grid, handheld devices, personal medical devices and industrial control
that have lower data rates, and transmit or receive data on an infrequent basis.
4.2.

Power supply

LinkIt 7687 HDK supports two types of power supply.
1) Power up with a micro-USB connector.
An on-board switching regulator provides voltage of 3.3V for the LinkIt 7687 HDK based on MT7687F, if the power
is supplied from an on-board micro-USB connector CON5 (Figure 1). This supply can be isolated from the
switching regulator using the jumpers. Note that the jumpers J27, J30, J23 and J26 are required to be set on.
More details on the jumpers can be found in Table 1.
Table 1. Jumper settings for system power input through USB connection
Jumper Usage
3.3V power supply
J27
J30 Current measurement
RTC3V3 power supply
J23
J26 Current measurement in RTC
mode
2) Power up using an AA or AAA battery.
•
Connect an external AA battery to battery pin header (J21) to supply power to the system, as shown in
Figure 4. When use AA battery ,please plug the USB to micro-USB connector CON5 (Figure 1).Note that
the jumpers J28, J30, J24 and J26 are required to be set on. More details on the jumpers can be found
in Table 2.
This document contains information that is proprietary to MediaTek Inc. ("MediaTek") and/or its licensor(s).
Any unauthorized use, reproduction or disclosure of this document in whole or in part is strictly prohibited.
Comments
Use micro-USB connector supporting 3.3V
power source.
Measures the current flow in MT7687F.
Use micro-USB connector supporting RTC
3V3 power.
Measures the current flow in the MT7687F
RTC mode.
© 2015 – 2016 MediaTek Inc.
LinkIt 7687 HDK V30 User's Guide
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