ST STM32F10 Series Installation and operating instructions

November 2011 Doc ID 13675 Rev 7 1/28
AN2586
Application note
Getting started with STM32F10xxx hardware development
Introduction
This application note is intended for system designers who require a hardware
implementation overview of the development board features such as the power supply, the
clock management, the reset control, the boot mode settings and the debug management. It
shows how to use the low-density value line, low-density, medium-density value line,
medium-density, high-density, XL-density and connectivity line STM32F10xxx product
families and describes the minimum hardware resources required to develop an
STM32F10xxx application.
Detailed reference design schematics are also contained in this document with descriptions
of the main components, interfaces and modes.
Glossary
●Low-density value line devices are STM32F100xx microcontrollers where the Flash
memory density ranges between 16 and 32 Kbytes.
●Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx
microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
●Medium-density value line devices are STM32F100xx microcontrollers where the
Flash memory density ranges between 64 and 128 Kbytes.
●Medium-density devices are STM32F100xx, STM32F101xx, STM32F102xx and
STM32F103xx microcontrollers where the Flash memory density ranges between 64
and 128 Kbytes.
●High-density value line devices are STM32F100xx microcontrollers where the Flash
memory density ranges between 256 and 512 Kbytes.
●High-density devices are STM32F101xx and STM32F103xx microcontrollers where
the Flash memory density ranges between 256 and 512 Kbytes.
●XL-density devices are STM32F101xx and STM32F103xx microcontrollers where the
Flash memory density ranges between 768 Kbytes and 1 Mbyte.
●Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
www.st.com

Contents AN2586
2/28 Doc ID 13675 Rev 7
Contents
1 Power supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.1.1 Independent A/D converter supply and reference voltage . . . . . . . . . . . . 6
1.1.2 Battery backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.1.3 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.2 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1.3 Reset and power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1.3.1 Power on reset (POR) / power down reset (PDR) . . . . . . . . . . . . . . . . . . 8
1.3.2 Programmable voltage detector (PVD) . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.3.3 System reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Clocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1 HSE OSC clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.1.1 External source (HSE bypass) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.1.2 External crystal/ceramic resonator (HSE crystal) . . . . . . . . . . . . . . . . . 12
2.2 LSE OSC clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.1 External source (LSE bypass) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.2.2 External crystal/ceramic resonator (LSE crystal) . . . . . . . . . . . . . . . . . . 13
2.3 Clock security system (CSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3 Boot configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Boot mode selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Boot pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 Embedded boot loader mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4 Debug management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.2 SWJ debug port (serial wire and JTAG) . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3 Pinout and debug port pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.1 SWJ debug port pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.2 Flexible SWJ-DP pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.3.3 Internal pull-up and pull-down resistors on JTAG pins . . . . . . . . . . . . . . 19
4.3.4 SWJ debug port connection with standard JTAG connector . . . . . . . . . 19

AN2586 Contents
Doc ID 13675 Rev 7 3/28
5 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1 Printed circuit board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2 Component position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3 Ground and power supply (VSS, VDD) . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4 Decoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.5 Other signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.6 Unused I/Os and features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 Reference design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1.1 Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1.2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1.3 Boot mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1.4 SWJ interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1.5 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2 Component references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

List of tables AN2586
4/28 Doc ID 13675 Rev 7
List of tables
Table 1. Boot modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 2. Debug port pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 3. SWJ I/O pin availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Table 4. Mandatory components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 5. Optional components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 6. Reference connection for all packages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

AN2586 List of figures
Doc ID 13675 Rev 7 5/28
List of figures
Figure 1. Power supply overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Power supply scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 3. Power on reset/power down reset waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4. PVD thresholds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 5. Reset circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 6. External clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 7. Crystal/ceramic resonators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 8. External clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 9. Crystal/ceramic resonators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 10. Boot mode selection implementation example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 11. Host-to-board connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 12. JTAG connector implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 13. Typical layout for VDD/VSS pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 14. STM32F103ZE(T6) microcontroller reference schematic . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Power supplies AN2586
6/28 Doc ID 13675 Rev 7
1 Power supplies
1.1 Introduction
The device requires a 2.0 V to 3.6 V operating voltage supply (VDD). An embedded regulator
is used to supply the internal 1.8 V digital power.
The real-time clock (RTC) and backup registers can be powered from the VBAT voltage when
the main VDD supply is powered off.
Figure 1. Power supply overview
Note: VDDA and VSSA must be connected to VDD and VSS, respectively.
1.1.1 Independent A/D converter supply and reference voltage
To improve conversion accuracy, the ADC has an independent power supply that can be
filtered separately, and shielded from noise on the PCB.
●the ADC voltage supply input is available on a separate VDDA pin
●an isolated supply ground connection is provided on the VSSA pin
When available (depending on package), VREF– must be tied to VSSA.
On 100-pin and 144-pin packages
To ensure a better accuracy on low-voltage inputs, the user can connect a separate external
reference voltage ADC input on VREF+. The voltage on VREF+ may range from 2.4 V to
VDDA.
A/D converter
V
DD
V
SS
I/O Ring
BKP registers
Temp. sensor
Reset block
Standby circuitry
PLL
(Wakeup logic,
IWDG)
RTC
Voltage regulator
Core
memories'
digital
peripherals
Low voltage detector
(V
SSA
) V
REF–
V
DDA
domain
V
DD
domain 1.8 V domain
Backup domain
LSE crystal 32 KHz oscillator
RCC BDCR register
ai14863
(from 2.4 V up to V
DDA
) V
REF+
(V
DD
) V
DDA
(V
SS
) V
SSA
(V
DD
) V
BAT

AN2586 Power supplies
Doc ID 13675 Rev 7 7/28
On packages with 64 pins or less
The VREF+ and VREF- pins are not available, they are internally connected to the ADC
voltage supply (VDDA) and ground (VSSA).
1.1.2 Battery backup
To retain the content of the Backup registers when VDD is turned off, the VBAT pin can be
connected to an optional standby voltage supplied by a battery or another source.
The VBAT pin also powers the RTC unit, allowing the RTC to operate even when the main
digital supply (VDD) is turned off. The switch to the VBAT supply is controlled by the power
down reset (PDR) circuitry embedded in the Reset block.
If no external battery is used in the application, it is highly recommended to connect VBAT
externally to VDD.
1.1.3 Voltage regulator
The voltage regulator is always enabled after reset. It works in three different modes
depending on the application modes.
●in Run mode, the regulator supplies full power to the 1.8 V domain (core, memories and
digital peripherals)
●in Stop mode, the regulator supplies low power to the 1.8 V domain, preserving the
contents of the registers and SRAM
●in Standby mode, the regulator is powered off. The contents of the registers and SRAM
are lost except for those concerned with the Standby circuitry and the Backup domain.
1.2 Power supply schemes
The circuit is powered by a stabilized power supply, VDD.
●Caution:
– If the ADC is used, the VDD range is limited to 2.4 V to 3.6 V
– If the ADC is not used, the VDD range is 2.0 V to 3.6 V
●The VDD pins must be connected to VDD with external decoupling capacitors (one
100 nF Ceramic capacitor for each VDD pin + one Tantalum or Ceramic capacitor (min.
4.7 µF typ.10 µF).
●The VBAT pin can be connected to the external battery (1.8 V < VBAT < 3.6 V). If no
external battery is used, it is recommended to connect this pin to VDD with a 100 nF
external ceramic decoupling capacitor.
●The VDDA pin must be connected to two external decoupling capacitors (100 nF
Ceramic + 1 µF Tantalum or Ceramic).
●The VREF+ pin can be connected to the VDDA external power supply. If a separate,
external reference voltage is applied on VREF+, a 100 nF and a 1 µF capacitors must be
connected on this pin. In all cases, VREF+ must be kept between 2.4 V and VDDA.
●Additional precautions can be taken to filter analog noise:
–V
DDA can be connected to VDD through a ferrite bead.
–TheV
REF+ pin can be connected to VDDA through a resistor (typ. 47 Ω).

Power supplies AN2586
8/28 Doc ID 13675 Rev 7
Figure 2. Power supply scheme
1. Optional. If a separate, external reference voltage is connected on VREF+, the two capacitors (100 nF and
1 µF) must be connected.
2. VREF+ is either connected to VDDA or to VREF.
3. N is the number of VDD and VSS inputs.
1.3 Reset and power supply supervisor
1.3.1 Power on reset (POR) / power down reset (PDR)
The device has an integrated POR/PDR circuitry that allows proper operation starting from
2V.
The device remains in the Reset mode as long as VDD is below a specified threshold,
VPOR/PDR, without the need for an external reset circuit. For more details concerning the
power on/power down reset threshold, refer to the electrical characteristics in the low-
density, medium-density, high-density, XL-density, and connectivity line STM32F10xxx
datasheets.
Figure 3. Power on reset/power down reset waveform
VBAT
STM32F10xxx
N × 100 nF
VDD
+ 1 × 10 µF
100 nF + 1 µF
100 nF + 1 µF
(note 1)
Battery
VBAT VREF+
VDDA
VSSA
VREF–
VDD 1/2/3/.../N
VSS 1/2/3/.../N
VREF
VDD
ai14865b
VDD
POR
PDR
40 mV
hysteresis
Temporization
tRSTTEMPO
RESET
ai14364

AN2586 Power supplies
Doc ID 13675 Rev 7 9/28
1.3.2 Programmable voltage detector (PVD)
You can use the PVD to monitor the VDD power supply by comparing it to a threshold
selected by the PLS[2:0] bits in the Power control register (PWR_CR).
The PVD is enabled by setting the PVDE bit.
A PVDO flag is available, in the Power control/status register (PWR_CSR), to indicate
whether VDD is higher or lower than the PVD threshold. This event is internally connected to
EXTI Line16 and can generate an interrupt if enabled through the EXTI registers. The PVD
output interrupt can be generated when VDD drops below the PVD threshold and/or when
VDD rises above the PVD threshold depending on the EXTI Line16 rising/falling edge
configuration. As an example the service routine can perform emergency shutdown tasks.
Figure 4. PVD thresholds
1.3.3 System reset
A system reset sets all registers to their reset values except for the reset flags in the clock
controller CSR register and the registers in the Backup domain (see Figure 1).
A system reset is generated when one of the following events occurs:
1. A low level on the NRST pin (external reset)
2. window watchdog end-of-count condition (WWDG reset)
3. Independent watchdog end-of-count condition (IWDG reset)
4. A software reset (SW reset)
5. Low-power management reset
The reset source can be identified by checking the reset flags in the Control/Status register,
RCC_CSR.
VDD
100 mV
hysteresis
PVD threshold
PVD output
ai14365

Power supplies AN2586
10/28 Doc ID 13675 Rev 7
The STM32F1xx does not require an external reset circuit to power-up correctly. Only a pull-
down capacitor is recommended to improve EMS performance by protecting the device
against parasitic resets. See Figure 5.
Charging and discharging a pull-down capacitor through an internal resistor increases the
device power consumption. The capacitor recommended value (100 nF) can be reduced to
10 nF to limit this power consumption;
Figure 5. Reset circuit
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