7.5 Board functions
7.5.1 128 × 64‑pixel OLED display
The STM32WB5MM-DK board embeds the 9OL9935718000 OLED display from RiTdisplay Corporation. It is a
128 × 64‑pixel OLED display panel matrix, with high contrast and SPI driven interface to display messages and
user menus. The OLED panel matrix is controlled by an SSD1315Z embedded inside the display.
7.5.2 U8 Quad-SPI NOR Flash memory
The STM32WB5MM-DK board embeds a 128‑Mbit Quad-SPI NOR Flash memory device
(S25FL128SDSMFV001 from Cypress), which is connected to an STM32W5MMG dedicated Quad-SPI interface
described in Table 5.
Table 5. U8 Quad-SPI NOR Flash memory connection with STM32W5MMG
Quad-SPI memory pin
number
Quad-SPI memory pin
name
STM32W5MMG pin number STM32W5MMG signal name
7 /CS 70 (PD3) QSPI_BK_NCS
16 SCK 56 (PA3) QSPI_BK_SCK
15 IO0 11 (PB9) QSPI_BK_IO0
8 IO1 80 (PD5) QSPI_BK_IO1
9 IO2 81 (PD6) QSPI_BK_IO2
1 IO3 67 (PD7) QSPI_BK_IO3
7.5.3 Virtual COM port
ST-LINK/V2-1 offers a USB Virtual COM port bridge. This feature allows access to the STM32W5MMG USART1
by the CN11 USB_STLINK connector.
By default, this STM32W5MMG USART1 interface is connected to the UART2 port of the STM32F103 ST-LINK/
V2-1 MCU.
Table 6. UART interface pinout description
STM32W5MMG CN10 STM32F103
USART1 RX (PB7/pin 18) Pin 1 STLINK_TX: UART2 TX (PA2/pin 12)
USART1 TX (PB6/pin 39) Pin 2 STLINK_RX: UART2 RX (PA3/pin 13)
7.5.4 MEMS microphone
The IMP34DT05TR MEMs microphone is connected through an SAI interface to the STM32W5MMG module.
SAI1_CK2 and SAI1_DI2 are connected to the microphone and ensure the recording.
Table 7. IMP34DT05TR‑STM32W5MMG SAI interface
STM32W5MMG IMP34DT05TR
SAI1_CK2 (PA8/pin 50) CLK, Clock in (pin 3)
SAI1_DI2 (PA9/pin 51) DOUT, PDM data out (pin 4)
UM2825
Board functions
UM2825 - Rev 1
page 16/42
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