Strange Thing

STM32F103C8T6


Board

NameStrange Thing
PartUnknown
BrandUnknown
OriginChina

Microcontroller

PartSTM32F103C8T6
ManufacturerST-Microelectronics
CoreArm Cortex-M3
Max. Clock Speed72MHz
PackageLQFP 48 pins

Internal memories

FLASH64KiB
SRAM20KiB

Oscillators

HSI8MHz
LSI40kHz
HSE8MHz
LSE32.768kHz

Power

Sources
Any +3.3V pin (+3.3V)
Any +5V pin (+5V)
USB connector (+5V)
VDDA pinNo
VSSA pinNo
VREF- pinNo
VREF+ pinNo
Backup batteryPin

Regulator

ManufacturerAdvanced Monolithic Systems Inc.
PartAMS1117 (AMS1117)
PackageSOT223 3 pins
Input+4.6V to +15V
Output+3.3V @ 1A
DatasheetAMS1117.pdf

PCB

ColorBlack
Size (w x l)34mm x 33mm
MountingNone

Remarks

  • Warning: The +5V pins on this board are directly connected to the +5V pin of the USB connector. There is no protection in place. Do not power this board through USB and an external power supply at the same time.

Pictures

Strange Thing: Perspective view
Strange Thing: Perspective view
Strange Thing: Top view
Strange Thing: Top view
Strange Thing: Bottom view
Strange Thing: Bottom view

Inputs & outputs


Reset button

Name NRST
Reference -
Type button
Connected to NRST
Mode Active low

BOOT0 jumper

Name -
Reference -
Type 1-way jumper
Connected to BOOT0
Mode Active low
  • Note: This jumper is part of Header 4.

BOOT1 jumper

Name -
Reference -
Type 1-way jumper
Connected to BOOT1
Mode Active low
  • Note: This jumper is part of Header 4.

Power LED

Name -
Reference -
Type LED
Connected to +3.3V rail
Mode N.A.

User LED

Name -
Reference -
Type LED
Connected to PB0
Mode Sink

Connectors & headers


Header 1 properties

Name Unknown
Reference None
Type Pin header (2.54mm, 8x2, male)

Header 1 pins

# Name Function Connected to
1 A0 - PA0
2 A1 - PA1
3 A2 - PA2
4 A3 - PA3
5 A4 - PA4
6 A5 - PA5
7 A6 - PA6
8 A7 - PA7
9 A8 - PA8
10 A9 - PA9
11 A10 - PA10
12 A11 - PA11
13 A12 - PA12
14 A13 - PA13
15 A14 - PA14
16 A15 - PA15

Header 2 properties

Name Unknown
Reference None
Type Pin header (2.54mm, 8x2, male)

Header 2 pins

# Name Function Connected to
1 B0 - PB0
2 B1 - PB1
3 B2 - PB2
4 B3 - PB3
5 B4 - PB4
6 B5 - PB5
7 B6 - PB6
8 B7 - PB7
9 B8 - PB8
10 B9 - PB9
11 B10 - PB10
12 B11 - PB11
13 B12 - PB12
14 B13 - PB13
15 B14 - PB14
16 B15 - PB15

Header 3 properties

Name Unknown
Reference None
Type Pin header (2.54mm, 13x1, male)

Header 3 pins

# Name Function Connected to
1 3.3 - +3.3V rail
2 5V - +5V rail
3 GND - Ground plane
4 GND - Ground plane
5 C13 - PC13
6 C14 - PC14
7 C15 - PC15
8 RST - NRST
9 BAT - VBAT
10 3.3 - +3.3V rail
11 5V - +5V rail
12 GND - Ground plane
13 GND - Ground plane

Header 4: SWD & Serial properties

Name Unknown
Reference None
Type Pin header (2.54mm, 6x2, male)

Header 4: SWD & Serial pins

# Name Function Connected to
1 5V - +5V rail
2 3.3 - +3.3V rail
3 RX - PA10
4 DIO SWDIO PA13
5 TX - PA9
6 CLK SWCLK PA14
7 GND - Ground plane
8 GND - Ground plane
9 BT0 - BOOT0, pulled up by 10kΩ resistor
10 - - Ground plane
11 BT1 - BOOT1, pulled up by 10kΩ resistor
12 - - Ground plane

USB connector properties

Name Unknown
Reference None
Type USB Micro

USB connector pins

# Name Function Connected to
1 - VCC +5V rail
2 - D- PA11
3 - D+ PA12
4 - ID N.C.
5 - GND Ground plane