ST STMod+ User manual
Introduction
The STMod+ fan-out expansion board provides extension connectors for the direct use of popular third-party modules from
different manufacturers. It can be used with the STM32 Discovery boards or Evaluation boards featuring an STMod+ connector
to increase the demonstration scopes of their STM32 microcontrollers.
This board is also referred to as the Fanout board or MB1280 in STMicroelectronics related technical literature.
The STMod+ fan-out expansion board features:
•mikroBUS™ compatible connectors
• ESP‑01 compatible connector
•Seeed Studio™ Grove compatible connectors
• Reserved standard 2.54 mm pitch pin header for breadboard
• 5 V power
• 3.3 V regulator
•I2C level shifters (footprint only)
Figure 1. Fan-out board (MB1280) top view
Picture is not contractual.
The board is delivered as part of the products listed in Table 1.
Table 1. Products featuring the fan-out board (MB1280)
Type Products
STM32 Discovery kits 32F723EDISCOVERY, 32L496GDISCOVERY, 32L4R9IDISCOVERY, STM32F7308-DK, STM32H745I-DISCO,
STM32H747I-DISCO, STM32H750B-DK, STM32H7B3I-DK, STM32L562E-DK.
STMod+ fan-out expansion board
for STM32 Discovery kits and Evaluation boards
UM2695
User manual
UM2695 - Rev 1 - March 2020
For further information contact your local STMicroelectronics sales office.
www.st.com
1Hardware layout and configuration
The design of the MB1280 fan-out board is based on the STMicroelectronics STMod+ connector. Refer to
technical note STMod+ interface specification (TN1238) for details.
Figure 2 illustrates how the fan-out board extends the Discovery boards and Evaluation boards connections to
other modules. Figure 3 helps to locate the various connectors on the fan-out board.
Figure 2. Fan-out board hardware block diagram
Fan-out board
STM32 board Third-party
module
STMod+
female connector
mikroBUS™
ESP-01
Grove I2C
Grove UART
Breadboard
STMod+
male connector
Figure 3. Fan-out board layout
CN1
STMod+
CN2
Grove UART
CN4
ESP-01
CN5 / CN7
3.3 V power
CN10 / CN11
mikroBUS™
JP1
3.3 V / 5 V
selection
CN9 / CN12
Breadboard
pad
CN6 / CN8
5 V power
CN3
Grove I2C
UM2695
Hardware layout and configuration
UM2695 - Rev 1 page 2/12
2Connectors
2.1 STMod+ male connector CN1
The standard 20-pin STMod+ male connector is available on the fan-out board for connection to the STMod+
female connector on the STM32 board featuring an STM32 microcontroller based on the Arm® Cortex®-M
processor. Table 2 shows the definition of the pins.
Table 2. Description of the STMod+ connector pins
STMod+ connector Pin number Pin number STMod+ connector
STMod+#1-NSS/CTS 1 11 STMod+#11-INT
STMod+#2-MOSIp/TX 2 12 STMod+#12-RST
STMod+#3-MISOp/ RX 3 13 STMod+#13-ADC
STMod+#4-SCK/RTS 4 14 STMod+#14-PWM
GND 5 15 5 V
5 V 6 16 GND
STMod+#7-SCL 7 17 STMod+#17
STMod+#8-MOSIs 8 18 STMod+#18
STMod+#9-MISOs 9 19 STMod+#19
STMod+#10-SDA 10 20 STMod+#20
Note: Arm is a registered trademark of Arm Limited (or its subsidiaries) in the US and/or elsewhere.
2.2 Compatible connectors for the Grove boards
Both Grove board connectors described in this section are 2.54 mm pitch 1×4-pin male connectors. Their Seeed
Studio™ part number is A2006LF-04A.
2.2.1 Compatible connector for UART Grove boards CN2
The CN2 connector is compatible with Grove-NFC boards using cable connection. Table 3 shows the definition of
the pins.
Table 3. Description of the UART Grove connector pins
STMod+ connector CN2 Grove function Pin number
STMod+#3-RX RX (Grove TX) 1
STMod+#2-TX TX (Grove RX) 2
- VCC 3
- GND 4
UM2695
Connectors
UM2695 - Rev 1 page 4/12
2.2.2 Compatible connector for I2C Grove boards CN3
The CN3 connector is compatible with Grove-Barometer sensor (BMP180) or Grove-LCD RGB backlight boards
using cable connection. Table 4 shows the definition of the pins.
Table 4. Description of the I2C Grove connector pins
STMod+ connector CN3 Grove function Pin number
STMod+#7-SCL(1) SCL 1
STMod+#10-SDA(1) SDA 2
- VCC 3
- GND 4
1. The following limitations apply:
• For fan-out board versions MB1280A and MB1280B, the Grove connector does not support the 5 V I2C interface.
• The fan-out board version MB1280C can support the 5 V I2C interface for the Grove connector, but users must solder
the MOSFETs and related matched resistors by themselves.
2.3 ESP‑01 Wi‑Fi® board compatible connector CN4
The ESP‑01 Wi‑Fi® board connector is composed of 2×4-pin female connectors with a 2.54 mm pitch. Table 5
shows the definition of the pins.
Table 5. Description of the ESP‑01 Wi‑Fi® board connector pins
STMod+
connector CN11 ESP‑01 function Pin number Pin number ESP‑01 function STMod+
connector CN10
- GND 1 2 RXD (ESP-01
TXD) STMod+#3-RX
STMod+#14 GPIO2 3 4 CH_PD STMod+#13
STMod+#11 GPIO0 5 6 RST STMod+#12-RST
STMod+#2-TX TXD (ESP-01
RXD) 7 8 3V3 -
UM2695
ESP‑01 Wi‑Fi® board compatible connector CN4
UM2695 - Rev 1 page 5/12
2.4 Breadboard connectors CN9 and CN12
Both breadboard connectors are 2.54 mm pitch 1×10-pin connectors. Only the footprint pad is available on the
fan-out board for user development. Table 6 shows the definition of the pins.
Table 6. Description of the breadboard connector pins
Breadboard connector CN12 Pin number Pin number Breadboard connector CN9
STMod+#13-ADC 1 1 STMod+#14-PWM
STMod+#12-RST 2 2 STMod+#11-INT
STMod+#1-NSS/CTS 3 3 STMod+#3-MISOp/RX
STMod+#4-SCK/RTS 4 4 STMod+#2-MOSIp/TX
STMod+#9-MISOs 5 5 STMod+#7-SCL
STMod+#8-MOSIs 6 6 STMod+#10-SDA
5 V 7 7 5 V
GND 8 8 GND
STMod+#17 9 9 STMod+#19
STMod+#18 10 10 STMod+#20
2.5 mikroBUS™ compatible connectors CN10 and CN11
mikroBUS™ compatible connectors CN10 and CN11 are a pair of 1×8-pin female connectors with a 2.54 mm
pitch. Table 7 shows the definition of the pins.
Table 7. Description of the mikroBUS™ connector pins
STMod+
connector CN11
mikroBUS™
function Pin number Pin number mikroBUS™
function
STMod+
connector CN10
STMod+#13-ADC AN 1 1 PWM STMod+#14-PWM
STMod+#12-RST RST 2 2 INT STMod+#11-INT
STMod+#1-CS CS 3 3 RX STMod+#3-RX
STMod+#4-SCK SCK 4 4 TX STMod+#2-TX
STMod+#9-MISOs MISO 5 5 SCL STMod+#7-SCL
STMod+#8-MOSIs MOSI 6 6 SDA STMod+#10-SDA
- +3.3 V 7 7 +5 V -
- GND 8 8 GND -
The mikroBUS™ pinout assignment is available at the mikroe.com website.
UM2695
Breadboard connectors CN9 and CN12
UM2695 - Rev 1 page 6/12
2.6 Power selection jumper JP1
JP1 is a 3-pin jumper selector for 5 V or 3.3 V power switch. Table 8 shows the definition of the power selection.
Table 8. Description of the power selection
JP1 position VCC selection
1 2 3
VCC is connected to 5 V.
1 2 3
VCC is connected to 3.3 V.
UM2695
Power selection jumper JP1
UM2695 - Rev 1 page 7/12
Revision history
Table 9. Document revision history
Date Version Changes
20-Mar-2020 1 Initial release.
UM2695
UM2695 - Rev 1 page 8/12
Contents
1Hardware layout and configuration.................................................2
2Connectors........................................................................4
2.1 STMod+ male connector CN1 ....................................................4
2.2 Compatible connectors for the Grove boards .......................................4
2.2.1 Compatible connector for UART Grove boards CN2 ..............................4
2.2.2 Compatible connector for I2C Grove boards CN3 ................................5
2.3 ESP‑01 Wi‑Fi® board compatible connector CN4 ....................................5
2.4 Breadboard connectors CN9 and CN12............................................6
2.5 mikroBUS™ compatible connectors CN10 and CN11.................................6
2.6 Power selection jumper JP1 .....................................................7
Revision history ........................................................................8
Contents ...............................................................................9
List of tables ..........................................................................10
List of figures..........................................................................11
UM2695
Contents
UM2695 - Rev 1 page 9/12
List of tables
Table 1. Products featuring the fan-out board (MB1280) ...............................................1
Table 2. Description of the STMod+ connector pins ..................................................4
Table 3. Description of the UART Grove connector pins ...............................................4
Table 4. Description of the I2C Grove connector pins .................................................5
Table 5. Description of the ESP‑01 Wi‑Fi® board connector pins .........................................5
Table 6. Description of the breadboard connector pins ................................................6
Table 7. Description of the mikroBUS™ connector pins ................................................6
Table 8. Description of the power selection ........................................................7
Table 9. Document revision history ..............................................................8
UM2695
List of tables
UM2695 - Rev 1 page 10/12
Table of contents
Other ST Microcontroller manuals
ST
ST STM32U575I-EV User manual
ST
ST STM32F10 Series Installation and operating instructions
ST
ST UM0250 User manual
ST
ST STM32F446 Series User manual
ST
ST NUCLEO-WB55RG STM32WB User manual
ST
ST STEVAL-L6982NDR User manual
ST
ST STM32F20 Series Installation and operating instructions
ST
ST STM32L0 Series Installation and operating instructions
ST
ST STM32F0 Series Installation and operating instructions
ST
ST STM32F2 Series User manual
ST
ST STM32F412 User manual
ST
ST STM8S Installation and operating instructions
ST
ST STM32 Series Installation and operating instructions
ST
ST STM32F072 User manual
ST
ST Turbo uPSD DK3300-ELCD User manual
ST
ST STM8S User manual
ST
ST STM32F413 Series User manual
ST
ST STM32MP135F-DK User manual
ST
ST STM32F4DISCOVERY User manual
ST
ST STM32 Nucleo Installation and operating instructions
Popular Microcontroller manuals by other brands
AMS
AMS AS7261 Demo Kit user guide
Novatek
Novatek NT6861 manual
Espressif Systems
Espressif Systems ESP8266 SDK AT Instruction Set
Nuvoton
Nuvoton ISD61S00 ChipCorder Design guide
STMicrolectronics
STMicrolectronics ST7 Assembler Linker user manual
Texas Instruments
Texas Instruments Chipcon CC2420DK user manual
Texas Instruments
Texas Instruments TMS320F2837 D Series Workshop Guide and Lab Manual
CYPRES
CYPRES CY14NVSRAMKIT-001 user guide
Texas Instruments
Texas Instruments INA-DUAL-2AMP-EVM user guide
Espressif Systems
Espressif Systems ESP8266EX Programming guide
Abov
Abov AC33M8128L user manual
Laird
Laird BL654PA user guide