Datasheet

DocID027114 Rev 2 75/88
STM32F070xB STM32F070x6 Electrical characteristics
75
Figure 23. SPI timing diagram - master mode
1. Measurement points are done at CMOS levels: 0.3 V
DD
and 0.7 V
DD
.
USB characteristics
The STM32F070xB/6 USB interface is fully compliant with the USB specification version 2.0
and is USB-IF certified (for Full-speed device operation).
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Table 59. USB electrical characteristics
Symbol Parameter Conditions Min. Typ Max. Unit
V
DD
USB transceiver operating
voltage
3.0
(1)
1. The STM32F070xB/6 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.
- 3.6 V
t
STARTUP
(2)
2. Guaranteed by design, not tested in production.
USB transceiver startup time - - 1.0 μs
R
PUI
Embedded USB_DP pull-up
value during idle
1.1 1.26 1.5
kΩ
R
PUR
Embedded USB_DP pull-up
value during reception
2.0 2.26 2.6
Z
DRV
(2)
Output driver impedance
(3)
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.
Driving high
and low
28 40 44 Ω
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