AT-START-F435
User Manual
2021.11.20
9
Rev
1.00
3.1
Power supply selection
The AT-START-F435 can not only be provided with 5 V through a USB cable (either through USB
connector CN6 on AT-Link-EZ or USB connector CN2/CN3 on AT-START-F435), but also be
provided with an external 5 V power supply (E5V). Then 5 V power provides 3.3 V for the
microcontroller and its peripherals using on-board 3.3 V voltage regulator (U2).
5 V pin of J4 or J7 can also be used as an input power, so the AT-START-F435 board can be
supplied through a 5 V power unit.
The 3.3 V pin of J4, or the VDD of J1 and J2 can be used as 3.3 V input directly, so AT-START-
F435 board can also be supplied by a 3.3 V power unit.
Note:
5 V power supply must be provided through USB connector (CN6) on AT-Link-EZ. Any other
method cannot power the AT-Link-EZ.
When another board is connected to J4, 5 V and 3.3 V can be used output power, J7’s 5V pin as 5
V output power, the VDD pin of J1 and J2 as 3.3 V output power.
3.2
IDD
When JP3 OFF (symbol IDD) and R17 OFF, an ammeter can be connected to measure the power
consumption of AT32F435ZMT7.
JP3 OFF, R17 ON:
AT32F435ZMT7 is powered. (Default setting and JP3 plug is not mounted before leaving
factory)
JP3 ON, R17 OFF:
AT32F435ZMT7 is powered.
JP3 OFF, R17 OFF:
An ammeter must be connected. If there is no ammeter available, the AT32F435ZMT7 cannot
be powered.
3.3
Programming and debugging: embedded AT-Link-EZ
The evaluation board integrates Artery AT-Link-EZ for users to program/debug the AT32F435ZMT7
on the AT-START-F435 board. AT-Link-EZ supports SWD interface mode, SWO debug, and a set
of virtual COM ports (VCP) to connect to the USART1_TX/USART1_RX (PA9/PA10) of
AT32F435ZMT7.
Please refer to
AT-Link User Manua
l for complete details on AT-Link-EZ.
The AT-Link-EZ on board can be disassembled or separated from the AT-START-F435. In this
case, the AT-START-F435 can still be connected to the CN7 interface (not mounted before leaving
factory) of AT-Link-EZ through CN4 interface (not mounted before leaving factory), or to AT-Link, in
order to continue to program and debug the AT32F435ZMT7.
