STM32L432KB datasheet(141/149 Pages) STMICROELECTRONICS

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STM32L432KB STM3L432KC

Electrical characteristics

142

Figure 29. SAI slave timing waveforms

USB characteristics

The STM32L432xx USB interface is fully compliant with the USB specification version 2.0

and is USB-IF certified (for Full-speed device operation).

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).

Table 80. USB electrical characteristics(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VDDUSB

USB transceiver operating voltage

3.0(2)

-3.6

Tcrystal_less USB crystal less operation temperature

-15

RPUI

Embedded USB_DP pull-up value during idle

900

1250

1600

Ω

RPUR

Embedded USB_DP pull-up value during

reception

1400

2300

3200

ZDRV(3)

Output driver impedance(4)

Driving high

and low

Ω

1. TA = -40 to 125 °C unless otherwise specified.

2. The STM32L432xx 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.

3. Guaranteed by design.

4. 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.

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