Datasheet

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STM32H743xI Electrical characteristics
196
USB OTG_FS characteristics
The USB interface is fully compliant with the USB specification version 2.0 and is USB-IF
certified (for Full-speed device operation).
USB OTG_HS characteristics
Unless otherwise specified, the parameters given in Table 109 for ULPI are derived from
tests performed under the ambient temperature, f
rcc_c_ck
frequency and V
DD
supply voltage
conditions summarized in Table 23: General operating conditions, with the following
configuration:
• Output speed
is set to OSPEEDRy[1:0] = 11
• Capacitive load C = 20 pF
• Measurement points are done at CMOS levels: 0.5V
DD
.
Refer to Section 6.3.15: I/O port characteristics for more details on the input/output
characteristics.
Table 108. USB OTG_FS electrical characteristics
Symbol Parameter Condition Min Typ Max Unit
V
DD33USB
USB transceiver operating
voltage
-3.0
(1)
1. The 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.
-3.6V
R
PUI
Embedded USB_DP pull-up
value during idle
- 900 1250 1600
R
PUR
Embedded USB_DP pull-up
value during reception
- 1400 2300 3200
Z
DRV
Output driver impedance
(2)
2. 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.
Driver high
and low
28 36 44
Table 109. Dynamic characteristics: USB ULPI
(1)
Symbol Parameter Conditions Min Typ Max Unit
t
SC
Control in (ULPI_DIR, ULPI_NXT) setup time - 0.5 - -
ns
t
HC
Control in (ULPI_DIR, ULPI_NXT) hold time - 6.5 - -
t
SD
Data in setup time - 2.5 - -
t
HD
Data in hold time - 0 - -
t
DC
/t
DD
Data/control output delay
2.7 V < V
DD
< 3.6 V,
C
L
= 20 pF
-6.58.5
--
6.5 13
1.7 V < V
DD
< 3.6 V,
C
L
= 15 pF
-
1. Guaranteed by characterization results.
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