Idd Measurement; Dsi Display (Mipi) Connector; Table 17. Idd Measurement Related Jumper Setting; Table 18. Dsi Display Module Connector Cn16 - ST STM32L4R9I-EVAL User Manual

UM2248
Pin number
of MFX
29
30
31
32
33
39
40
9.28

IDD measurement

STM32L4R9AII6 has a built-in circuit allowing to measure its own current consumption
(IDD) in Run and Low-power modes, except for Shutdown mode. It is strongly
recommended that the MCU supply voltage (VDD_MCU line) does not exceed 3.3 V. This is
because there are components on STM32L4R9I-EVAL supplied from 3.3 V that
communicate with the MCU through I/O ports. Voltage exceeding 3.3 V on the MCU output
port may inject current into 3.3 V-supplied peripheral I/Os and false the MCU current
consumption measurement.
Table 17
s
Jumper
JP4
9.29

DSI display (MIPI) connector

The CN16 connector is designed to connect DSI display daughterboard. MB1314
daughterboard is available to mount on STM32L4R9I-EVAL board.
assignment of CN16 and STM32L4R9AII6 terminals.
Pin No.
1
3
5
Table 16. MFX signals (continued)
Pin name
MFX functions
of MFX
PA8 MFX_GPIO8
PA9 MFX_GPIO9
PA10 MFX_GPIO10
PA11 MFX_GPIO11
PA12 MFX_GPIO12
PB3 MFX_GPIO3
PB4 MFX_GPIO4
shows settings of jumper associated with the IDD measurement on the board.

Table 17. IDD measurement related jumper setting

Setting

Table 18. DSI display module connector CN16

Description Pin connection Pin No.
GND
DSI_CK_P
DSI_CK_N
DocID030791 Rev 2
Hardware layout and configuration
Function of
STM32L4R9AII6
EXT_RESET
DSI_RST
-
LCD_DISP
LCD_RST
JOY_RIGHT
JOY_UP
Default setting.
STM32L4R9AII6 has a built-in circuit allowing to measure its
own current consumption.
IDD measurement is not available, bypass mode only for
STM32L4R9AII6 VDD_MCU power supply.
- 2
- 4
- 6
Direction
(for MFX)
Output
Output
-
Output
Output
Input
Input
Configuration
Table 18 shows the
Description Pin connection
-
DSI_INT
GND
Terminal
device
EXT_I2C
DSI LCD
-
TFT LCD
TFT LCD
Joystick
Joystick
-
PC2
-
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