Datasheet

Electrical characteristics STM32F765xx STM32F767xx STM32F768Ax STM32F769xx
186/255 DocID029041 Rev 6
Note:
When VBUS sensing feature is enabled, PA9 and PB13 should be left at their default state
(floating input), not as alternate function. A typical 200
µA current consumption of the
sensing block (current to voltage conversion to determine the different sessions) can be
observed on PA9 and PB13 when the feature is enabled.
Figure 56. USB OTG full speed timings: definition of data signal rise and fall time
R
PD
PA11, PA12, PB14, PB15
(USB_FS_DP/DM,
USB_HS_DP/DM)
V
IN
= V
DD
17 21 24
kΩ
PA9, PB13
(OTG_FS_VBUS,
OTG_HS_VBUS)
2.4 5.2 8
R
PU
PA12, PB15 (USB_FS_DP,
USB_HS_DP)
V
IN
= V
SS
1.5 1.8 2.1
PA9, PB13
(OTG_FS_VBUS,
OTG_HS_VBUS)
V
IN
= V
SS
0.55 0.95 1.35
1. All the voltages are measured from the local ground potential.
2. The USB OTG full speed transceiver functionality is ensured down to 2.7 V but not the full USB full speed
electrical characteristics which are degraded in the 2.7-to-3.0 V V
DDUSB
voltage range.
3. Guaranteed by design.
4.
R
L
is the load connected on the USB OTG full speed drivers.
Table 92. USB OTG full speed DC electrical characteristics (continued)
Symbol Parameter Conditions
Min.
(1)
Typ.
Max.
(1)
Unit
Table 93. USB OTG full speed electrical characteristics
(1)
1. Guaranteed by design.
Driver characteristics
Symbol Parameter Conditions Min Max Unit
t
r
Rise time
(2)
C
L
= 50 pF 420ns
t
f
Fall time
(2)
C
L
= 50 pF 4 20 ns
t
rfm
Rise/ fall time matching t
r
/t
f
90 110 %
V
CRS
Output signal crossover voltage - 1.3 2.0 V
Z
DRV
Output driver impedance
(3)
Driving high or
low
28 44 Ω
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