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| STM32L475XX Datasheet, PDF (172/193 Pages) STMicroelectronics – Ultra-low-power ARM Cortex-M4 32-bit MCU+FPU, 100DMIPS, up to 1MB Flash, 128 KB SRAM, USB OTG FS, analog, audio | |||
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Electrical characteristics
STM32L475xx
USB characteristics
The STM32L475xx USB interface is fully compliant with the USB specification version 2.0
and is USB-IF certified (for Full-speed device operation).
Table 89. USB electrical characteristics
Symbol
Parameter
Conditions Min
Typ
Max Unit
VDDUSB USB transceiver operating voltage
3.0(1)
-
3.6
V
RPUI
Embedded USB_DP pull-up value during idle 900
1250 1600
RPUR
Embedded USB_DP pull-up value during
reception
â¦
1400 2300 3200
ZDRV(2) Output driver impedance(3)
Driving high
and low
28
36
44
â¦
1. The STM32L475xx USB functionality is ensured down to 2.7 V but not the full USB electrical characteristics
which are degraded in the 2.7-to-3.0 V voltage range.
2. Guaranteed by design.
3. No external termination series resistors are required on USB_DP (D+) and USB_DM (D-); the matching
impedance is already included in the embedded driver.
CAN (controller area network) interface
Refer to Section 6.3.14: I/O port characteristics for more details on the input/output alternate
function characteristics (CAN_TX and CAN_RX).
172/193
DocID027692 Rev 2
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