Limitations; Operating Voltage; Octo-Spi Dram Device; Touch-Sensing Button - ST STM32L4R9I-EVAL User Manual

Hardware layout and configuration
Table 16. Configuration elements related to Octo-SPI Flash device (continued)
Element
R67
SB54
R75
SB55
6.24.1

Limitations

Octo-SPI Flash memory device operation is exclusive with OpAmp1 and with motor control.
6.24.2

Operating voltage

The voltage of Octo-SPI Flash memory device MX25LM51245GXDI00 is in the range of
2.7 V to 3.6 V.
6.25

Octo-SPI DRAM device

IS66WVH8M8BLL-100BLI, a 64-Mbit self-refresh dynamic RAM (DRAM) device with a
HyperBus interface, is fitted on the STM32L4R9I-EVAL main board, in U5 position. It allows
the evaluation of the STM32L4R9AII6 Octo-SPI interface.
6.25.1 Operating voltage
The voltage of the Octo-SPI DRAM device IS66WVH8M8BLL-100BLI is in the range of
2.7 V to 3.6 V.
6.25.2

Limitations

Board does not support Octo-SPI operation with IS66WVH8M8BLL-100BLI. No workaround
is available. Please refer to STM32L4Rxxx and STM32L4Sxxx device errata (ES0393).
6.26

Touch-sensing button

The STM32L4R9I-EVAL board supports a touch sensing button based on either RC
charging or charge-transfer technique. The latter is enabled, by default.
The touch sensing button is connected to the PC6 port of STM32L4R9AII6 and the related
charge capacitor is connected to PC7.
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Setting
Default setting.
R67 in
OctoSPI1_IO6 data line is available to the Octo-SPI Flash memory
SB54 open
device.
OctoSPI1_IO6 is not available to the Octo-SPI Flash memory
R67 out
device. PC3 port of SSTM32L4R9AII6 is routed to the motor-control
SB54 closed
signal.
Default setting.
R75 in
OctoSPI1_IO7 data line is available to the Octo-SPI Flash memory
SB55 open
device.
OctoSPI1_IO7 is not available to the Octo-SPI Flash memory
R75 out
device. PC4 port of STM32L4R9AII6 is routed to the motor-control
SB55 closed
signal.
UM2248 Rev 4
Configuration
UM2248