ARTERY AT-START-F407 User manual

AT-START-F407 User Manual
2020.11.20 1 Rev 1.20
www.arterytek.com
Get started with AT32F407VGT7
Introduction
AT-START-F407 is designed to help you explore the high-performance features of the 32-bit
microcontroller, AT32F407 embedded with ARM Cortex®-M4F with FPU, and help develop your
applications.
AT-START-F407 is an evaluation board based on AT32F407VGT7 chip with LED indicators,
buttons, an USB micro-B connector, an Ethernet RJ45 connector, ArduinoTM Uno R3 extension
connector and an expanded 16 MB SPI Flash memory. This evaluation board embeds
debugging/programming tool AT-Link-EZ without the need of other development tools.

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Contents
1Overview................................................................................................................. 5
1.1 Features................................................................................................................... 5
1.2 Definition of terms .................................................................................................... 5
2Quick start.............................................................................................................. 6
2.1 Get started................................................................................................................6
2.2 Toolchains supporting AT-START-F407 ....................................................................6
3Hardware and layout ............................................................................................. 7
3.1 Power supply selection............................................................................................. 9
3.2 IDD........................................................................................................................... 9
3.3 Programming and debugging .................................................................................10
3.3.1 Embedded AT-Link-EZ...............................................................................................10
3.3.2 20-pin ARM® standardJTAG connector.....................................................................10
3.4 Boot mode selection................................................................................................11
3.5 External clock source ..............................................................................................11
3.5.1 HSE clock source.......................................................................................................11
3.5.2 LSE clock source........................................................................................................11
3.6 LED indicators........................................................................................................ 12
3.7 Buttons...................................................................................................................12
3.8 USB device.............................................................................................................12
3.9 Connect to Bank3 of Flash memory via SPIM interface.......................................... 12
3.10 Ethernet.................................................................................................................. 13
3.11 0 Ω resistors ...........................................................................................................14
3.12 Extension connectors............................................................................................. 15
3.12.1 ArduinoTM Uno R3 extension connector.....................................................................15
3.12.2 LQFP100 I/O extension connector.............................................................................16
4Schematic............................................................................................................. 17
5Revision history................................................................................................... 22

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List of tables
Table 1. Boot mode selection jumper setting..................................................................................... 11
Table 2. GPIO and SPIM jumper setting............................................................................................12
Table 3. 0 Ω resistor setting ...............................................................................................................14
Table 4. ArduinoTM Uno R3 extension connector pin definition.........................................................15
Table 5. Document revision history....................................................................................................22

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List of figures
Figure 1. Hardware block diagram ......................................................................................................7
Figure 2. Top layer...............................................................................................................................8
Figure 3. Bottom layer .........................................................................................................................8
Figure 4. Schematic (AT-Link-EZ).....................................................................................................17
Figure 5. Schematic (microcontroller)................................................................................................18
Figure 6. Schematic (power supply and peripherals)........................................................................19
Figure 7. Schematic (extension connectors).....................................................................................20
Figure 8. Schematic (Ethernet PHY and RJ45 connector)................................................................21

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1 Overview
1.1 Features
AT-START-F407 has the following characteristics:
AT-START-F407 has an on-board AT32F407VGT7 microcontroller that embeds ARM Cortex®-
M4F, 32-bit processor, 1024 KB Flash memory and 96+128 KB SRAM, LQFP100 packages.
On-board AT-Link connector:
−The on-board AT-Link-EZ can be used for programming and debugging (AT-Link-EZ is a
simplified version of AT-Link, and does not support offline mode)
−If AT-Link-EZ is separated from this board by bending over along the joint, AT-START-F407
can be connected to an independent AT-Link for programming and debugging
On-board 20-pin ARM standard JTAG connector (with a JTAG/SWD connector for
programming/debugging)
16 MB SPI Flash EN25QH128A is used as an expanded Flash memory Bank 3
Various power supply methods:
−Through the USB bus of AT-Link-EZ
−Through the USB bus (VBUS) of AT-START-F407
−External 7~12 V power supply (VIN)
−External 5 V power supply (E5V)
−External 3.3 V power supply
4 x LED indicators:
−LED1 (red) used for 3.3 V power-on
−3 x user LED indicators, LED2 (red), LED3 (yellow) and LED4 (green)
2 x buttons (user button and reset button)
8 MHz HSE crystal
32.768 kHz LSE crystal
USB micro-B connector
Ethernet PHY with RJ45 connector
Various extension connectors can be quickly connected into a prototype board and easy to
explore:
−ArduinoTM Uno R3 extension connector
−LQFP100 I/O port extension connector
1.2 Definition of terms
Jumper JPx ON
Jumper installed
Jumper JPx OFF
Jumped not installed
Resistor Rx ON
Short circuit by solder or 0Ω resistor
Resistor Rx OFF
Open

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2 Quick start
2.1 Get started
Configure the AT-START-F407 board in the following order to start the application:
1. Check the Jumper position on the board:
JP1 is connected to GND or OFF (BOOT0 pin is 0, and BOOT0 has an pull-down resistor in the
AT32F407VGT7);
JP4 optional or OFF (BOOT1 is in any state);
JP8 one-piece jumper is connected to the I/O on the right.
2. Connect the AT-START-F407 board to the PC through an USB cable (Type A to micro-B), and
the board will be powered via AT-Link-EZ USB connector CN6. LED1 (red) is always on, and
the other three LEDs (LED2 to LED4) start to blink in turn.
3. After pressing the user button (B2), the blink frequency of three LEDs are changed.
2.2 Toolchains supporting AT-START-F407
ARM®Keil®: MDK-ARM™
IAR™: EWARM

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3 Hardware and layout
AT-START-F407 board is designed around an AT32F407VGT7 microcontroller in LQFP100
package.
Figure 1 shows the connections between AT-Link-EZ, AT32F407VGT7 and their peripherals
(buttons, LEDs, USB, Ethernet RJ45, SPI Flash memory and extension connectors)
Figure 2 and Figure 3 shows these features on the AT-Link-EZ and AT-START-F407 board.
Figure 1. Hardware block diagram
AT32F407VGT7
I/O
I/O
I/O
I/O
NRST
Reset
button
User
button
Arduino extension connector
Arduino extension connector
LQFP100 I/O extension connector
LQFP100 I/O extension connector
20-pin ARM standard
JTAG connector
AT-Link
connector
AT-Link-EZ
USER LEDs
LED2~LED4
Micro-USB
Micro-USB
SPI Flash
Bank3
SPIM
Ethernet
RJ45 Ethernet PHY

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Figure 2. Top layer
Figure 3. Bottom layer
External 7~12V power User LED
SPI Flash memory
AT32F407VGT7
Arduino Uno extension connector
LQFP100 I/O extension connector
USART1
connector
HSE 8 MHzcrystal
Arduino Uno
extension connector
USB micro-B
connector
DM9162NP
(Ethernet PHY)
Arduino Uno extension connector
LQFP100 I/O extension connector
I/O and USB
jumper
User button
Reset
button
AT-Link connector
Power
LED
IDD
measurement
jumper
AT-Link-EZ
20-pin ARM
standard JTAG
connector
Boot mode
selection
jumper
LSE 32.768 kHz crystal
RJ45
connector

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3.1 Power supply selection
The 5 V power supply of AT-START-F407 can be provided through a USB cable (either through the
USB connector CN6 on the AT-Link-EZ or USB connector CN1 on the AT-START-F407), or
through an external 5 V power supply (E5V), or by an external 7~12 V power supply (VIN) via 5V
voltage regulator (U1) on the board. In this case, the 5 V power supply provides the 3.3 V power
required by the microcontrollers and peripherals by means of the 3.3 V voltage regulator (U2) on
the board.
The 5 V pin of J4 or J7 can also be used as an input power source. The AT-START-F407 board
must be powered by a 5 V power supply unit.
The 3.3 V pin of J4 or the VDD pin of J1 and J2 can also be directly used as 3.3 V input power
supply. AT-START-F407 board must be powered by a 3.3 V power supply unit.
Note: Unless 5 V is provided through the USB connector (CN6) on the AT-Link-EZ, the AT-Link-EZ will
not be powered by other power supply methods.
When another application board is connected to J4, the VIN, 5 V and 3.3 V pins can be used as
output power; 5V pin of J7 used as 5 V output power; the VDD pin of J1 and J2 used as 3.3 V
output power.
3.2 IDD
In the event of JP3 OFF (symbol IDD) and R13 OFF, it is allowed to connect an ammeter to
measure the power consumption of AT32F407VGT7.
JP3 OFF, R13 ON
AT32F407VGT7 is powered. (Default setting, and JP3 plug is not mounted before shipping)
JP3 ON, R13 OFF
AT32F407VGT7 is powered.
JP3 OFF, R13 OFF
An ammeter must be connected to measure the power consumption of AT32F407VGT77 (if
there is no ammeter, the AT32F407VGT7 cannot be powered).

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3.3 Programming and debugging
3.3.1 Embedded AT-Link-EZ
The evaluation board embeds Artery AT-Link-EZ programming and debugging tool for users to
program/debug the AT32F407VGT7 on the AT-START-F407 board. AT-Link-EZ supports SWD
interface mode and supports a set of virtual COM ports (VCP) to connect to the
USART1_TX/USART1_RX (PA9/PA10) of AT32F407VGT7. In this case, PA9 and PA10 of
AT32F407VGT7 will be affected by AT-Link-EZ as follows:
PA9 is weakly pulled up to high level by the VCP RX pin of AT-Link-EZ;
PA10 is strongly pulled up to high level by the VCP TX pin of AT-Link-EZ
Note: The user can set R9 and R10 OFF, then the use of PA9 and PA10 of AT32F407VGT7 is not subject
to the above restrictions.
Please refer to AT-Link User Manual for complete details on the operations, firmware upgrade and
precautions of AT-Link-EZ.
The AT-Link-EZ PCB on the evaluation board can be separated from AT-START-F407 by bending
over along the joint. In this case, AT-START-F407 can still be connected to the CN7 of AT-Link-EZ
through CN2 (not mounted before shipping), or can be connected with another AT-Link to continue
the programming and debugging on the AT32F407VGT7.
3.3.2 20-pin ARM® standardJTAG connector
AT-START-F407 also reserves JTAG or SWD general-purpose connectors as
programming/debugging tools. If the user wants to use this interface to program and debug the
AT32F407VGT7, please separate the AT-Link-EZ from this board or set R41, R44 and R46 OFF,
and connect the CN3 (not mounted before shipping) to the programming and debugging tool.
It is recommended to use AT-Link series development tools to experience the best debugging
environment despite Artery MCUs compatible with most of the 3rd party development tools.

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3.4 Boot mode selection
At startup, three different boot modes can be selected by means of the pin configuration.
Table 1. Boot mode selection jumper setting
Jumper
Boot mode selection
pins
Setting
BOOT1
BOOT0
JP1 connected to GND or OFF;
JP4 optional or OFF
X(1)
0
Boot from the internal Flash memory
(Factory default setting)
JP1 connected to VDD
JP4 connected to GND
0
1
Boot from the system memory
JP1 connected to VDD
JP4 connected to VDD
1
1
Boot from SRAM
(1)It is recommended that JP4 selects GND when the PB2 function is not used.
3.5 External clock source
3.5.1 HSE clock source
The 8 MHz crystal on the board is used as HSE clock source
3.5.2 LSE clock source
There are three hardware modes to set the external low-speed clock sources:
On-board crystal (default setting):
The 32.768 kHz crystal on the board is used as LSE clock source. The hardware setting must
be: R6 and R7 ON, R5 and R8 OFF.
Oscillator from external PC14:
External oscillator is injected from the pin-3 of J2. The hardware setting must be: R5 and R8
ON, R6 and R7 OFF.
LSE not used:
PC14 and PC15 are used as GPIO. The hardware settings must be: R5 and R8 ON, R6 and
R7 OFF.

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3.6 LED indicators
Power LED1
Red indicates that the board is powered by 3.3 V
User LED2
Red, connected to the PD13 pin of AT32F407VGT7.
User LED3
Yellow, connected to the PD14 pin of AT32F407VGT7.
User LED4
Green, connected to the PD15 pin of AT32F407VGT7.
3.7 Buttons
Reset button B1
Connected to NRST to reset AT32F407VGT7
User button B2
It is, by default, connected to the PA0 of AT32F407VGT7, and alternatively used as a wake-up
button (R19 ON, R21 OFF); Or connected to PC13 and alternatively used as TAMPER-RTC
button (R19 OFF, R21 ON)
3.8 USB device
AT-START-F407 board supports USB full-speed device communication through an USB micro-B
connector (CN1). VBUS canbe used as 5 V power supply of AT-START-F407 board.
3.9 Connect to Bank3 of Flash memory via SPIM interface
The SPI Flash EN25QH128A on the board is connected to the AT32F407VGT7 via SPIM interface
and used as Bank 3 of expanded Flash memory.
When using the Bank 3 of the Flash memory via SPIM interface, the JP8 one-piece jumper, as
shown in Table 2,should select the left SPIM side. In this case, PB1, PA8, PB10 PB11, PB6 and
PB7 are not connected to the external LQFP100 I/O extension connector. These 6 pins are marked
by adding [*] after the pin name of extension connector on the PCB silkscreen.
Table 2. GPIO and SPIM jumper setting
Jumper
Settings
JP8 connected to I/O
Use I/O and Ethernet MAC function (Default setting before shipping)
JP8 connected to SPIM
Use the SPIM function

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3.10 Ethernet
AT-START-F407 embeds an Ethernet PHY DM9162NP (U8) and RJ45 connector (J10, internal
isolation transformer), supporting 10/100 Mbps dual-speed Ethernet communication.
When using Ethernet MAC, the JP8 one-piece jumper, as shown in Table 2, should select the right
I/O. In this case, PA8, PB10 and PB11 are connected to the external LQFP100 I/O extension
connectors.
Ethernet PHY is connected to the AT32F407VGT7 in RMII mode by default. In this case, the 25
MHz clock required by PHY is provided by the CLKOUT (PA8) pin of AT32F407VGT7 to the XT1
pin of PHY, while the 50 MHz clock required by RMII_REF_CLK (PA1) of the AT32F407VGT7 is
provided by the 50MCLK pin of PHY. The 50MCLK pin must be pulled up at power-on.
Ethernet PHY and AT32F407VGT7 can be connected in MII mode. The user needs to follow the
notes in the lower left corner of Figure 8.At this time, the TXCLK and RXCLK of PHY are
connected to the MII_TX_CLK (PC3) and MII_RX_CLK (PA1) of AT32F407VGT7, respectively.
Note that AT32F407VGT7 is connected to the PHY with the pin of remapping 1 configuration.
To simplify the PCB design, the PHY does not have an external Flash memory to allocate the PHY
address [3:0] at power-on, and the PHY address [3:0] is set to 0x0 by default. After power-on, the
software can re-assign the PHY address via the SMI connector of PHY.
For complete information on Ethernet MAC and DM9162NP of the AT32F407VGT7, please refer to
their respective technical manual and data sheet.
If the user does not use the DM9162NP on the board but select LQFP100 I/O extension connectors
J1 and J2 to connect to other Ethernet application boards, please refer to Table 3 to disconnect
AT32F407VGT7 from DM9162NP.

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3.11 0 Ωresistors
Table 3. 0 Ωresistor setting
Resistors
State(1)
Description
R13
(Microcontroller power
consumption
measurement)
ON
When JP3 is OFF, 3.3V is connected to the microcontroller
to provide power supply
OFF
When JP3 is OFF, 3.3V allows an ammeter to be connected
to measure the power consumption of microcontroller
(if no ammeter, the microcontroller cannot be powered)
R4
(VBAT power supply)
ON
VBAT must be connected to VDD
OFF
VBAT can be powered by the pin_6 VBAT of J2
R5, R6, R7, R8
(LSE)
OFF, ON, ON, OFF
LSE clock source uses crystal Y1 on the board
ON, OFF, OFF, ON
LSE clock source is from external PC14 or PC14 and PC15
are used as GPIO
R17
(VREF+)
ON
VREF+ is connected to VDD
OFF
VREF+ is connected to the J2 pin_21 or ArduinoTM
connector J3 AREF
R19, R21
(User button B2)
ON, OFF
User button B2 is connected to PA0
OFF, ON
User button B2 is connected to PC13
R29, R30
(PA11, PA12)
OFF, OFF
When PA11 and PA12used as USB, they are not connected
to pin-20 and pin_21 of J1
ON, ON
When PA11 and PA12 are not used as USB, they are
connected to pin_20 and pin_21 of J1
R62 ~ R64, R71 ~ R86
(USB PHY DM9162)
See notes in the
lower left corner of
Figure 8
Ethernet MAC of AT32F407VGT is connected to DM9162
through RMII mode (R66 and R70 are 4.7 kΩ )
See notes in the lower
left corner of Figure 8
Ethernet MAC of AT32F407VGT is connected to DM9162
through MII mode
All OFF except R66
and R70
Ethernet MAC of AT32F407VGT7 is disconnected from
DM9162 (in this case, AT-START-F403A board is a better
choice)
R31, R32, R33, R34
(ArduinoTM A4, A5)
OFF, ON, OFF, ON
ArduinoTM A4 and A5 are connected to ADC_IN11 and
ADC_IN10
ON, OFF, ON, OFF
ArduinoTM A4 and A5 are connected to I2C1_SDA and
I2C1_SCL
R35, R36
(ArduinoTM D10)
OFF, ON
ArduinoTM D10 is connected to SPI1_SS
ON, OFF
ArduinoTM D10 is connected to PWM (TMR4_CH1)
R9
(USART1_RX)
ON
USART1_RX of AT32F407VGT7 is connected to VCP TX of
AT-Link-EZ
OFF
USART1_RX of AT32F407VGT7 is disconnected from VCP
TX of AT-Link-EZ
R10
(USART1_TX)
ON
USART1_TX of AT32F407VGT7 is connected to VCP RX of
AT-Link-EZ
OFF
USART1_TX of AT32F407VGT7 is disconnected from VCP
RX of AT-Link-EZ
(1) The factory default Rx state is shown in bold.

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3.12 Extension connectors
3.12.1 ArduinoTM Uno R3 extension connector
Female plug J3~J6 and male J7 support standard ArduinoTM Uno R3 connector. Most of the
daughter boards designed around ArduinoTM Uno R3 are suitable for AT-START-F407.
Note 1: The I/O ports of AT32F407VGT7 are 3.3 V compatible with ArduinoTM Uno R3, but 5V incompatible.
Note 2: Set R17 OFF if it is needed to supply power through the J3 pin_8 AREF of AT-START-F407 to the
VREF+ of AT32F407VGT7 by means of ArduinoTM Uno R3 daughter board.
Table 4. ArduinoTM Uno R3 extension connector pin definition
Connector
Pin
number
Arduino
pin name
AT32F407
Pin name
Functions
J4
(Power supply)
1
NC
-
-
2
IOREF
-
3.3V reference
3
RESET
NRST
External reset
4
3.3V
-
3.3V input/output
5
5V
-
5V input/output
6
GND
-
Ground
7
GND
-
Ground
8
VIN
-
7~12V input/output
J6
(Analog input)
1
A0
PA0
ADC123_IN0
2
A1
PA1
ADC123_IN1
3
A2
PA4
ADC12_IN4
4
A3
PB0
ADC12_IN8
5
A4
PC1 or PB9(1)
ADC123_IN11 or I2C1_SDA
6
A5
PC0 or PB8(1)
ADC123_IN10 or I2C1_SCL
J5
(Logic input/output
low byte)
1
D0
PA3
USART2_RX
2
D1
PA2
USART2_TX
3
D2
PA10
-
4
D3
PB3
TMR2_CH2
5
D4
PB5
-
6
D5
PB4
TMR3_CH1
7
D6
PB10
TMR2_CH3
8
D7
PA8(2)
-
J3
(Logic input/output
high byte)
1
D8
PA9
-
2
D9
PC7
TMR3_CH2
3
D10
PA15 or PB6(1)(2)
SPI1_NSS or TMR4_CH1
4
D11
PA7
TMR3_CH2 or SPI1_MOSI
5
D12
PA6
SPI1_MISO
6
D13
PA5
SPI1_SCK
7
GND
-
Ground
8
AREF
-
VREF+ input/output
9
SDA
PB9
I2C1_SDA
10
SCL
PB8
I2C1_SCL

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Connector
Pin
number
Arduino
pin name
AT32F407
Pin name
Functions
J7
(Others)
1
MISO
PB14
SPI2_MISO
2
5V
-
5V input/output
3
SCK
PB13
SPI2_SCK
4
MOSI
PB15
SPI2_MOSI
5
RESET
NRST
External reset
6
GND
-
Ground
7
NSS
PB12
SPI2_NSS
8
PB11
PB11
-
(1) 0 Ωresistor setting is shown in Table 3.
(2) SPIM must be disabled and JP8 one-piece jumper must select I/O, otherwise PA8 and PB6 cannot be used.
3.12.2 LQFP100 I/O extension connector
The extension connectors J1 and J2 can connect the AT-START-F407 to external
prototype/packing board. The I/O ports of AT32F407VGT7 are available on these extension
connectors. J1 and J2 can also be measured with the probe of oscilloscope, logic analyzer or
voltmeter.
Note 1: Set R17 OFF if it is necessary to supply power through the J2 pin_21 VREF+ of AT-START-F407 by
and external power supply,

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4 Schematic Figure 4. Schematic (AT-Link-EZ)

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Figure 5. Schematic (microcontroller)

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Figure 6. Schematic (power supply and peripherals)

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Figure 7. Schematic (extension connectors)