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STM32F777XX Datasheet, PDF (167/255 Pages) STMicroelectronics – Dual mode Quad-SPI
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STM32F777xx STM32F778Ax STM32F779xx
Electrical characteristics
Table 67. I/O AC characteristics(1)(2) (continued)
OSPEEDRy
[1:0] bit
value(1)
Symbol
Parameter
Conditions
Min Typ Max Unit
CL = 30 pF, VDD ≥ 2.7 V
-
- 100(4)
CL = 30 pF, VDD ≥ 1.8 V
-
-
50
fmax(IO)out Maximum frequency(3)
CL = 30 pF, VDD ≥ 1.7 V
-
CL = 10 pF, VDD≥ 2.7 V
-
- 42.5
MHz
- 180(4)
CL = 10 pF, VDD ≥ 1.8 V
-
- 100
11
CL = 10 pF, VDD ≥ 1.7 V
-
- 72.5
CL = 30 pF, VDD ≥ 2.7 V
-
-
4
CL = 30 pF, VDD ≥1.8 V
-
-
6
tf(IO)out/
tr(IO)out
Output high to low level fall
time and output low to high
level rise time
CL = 30 pF, VDD ≥1.7 V
CL = 10 pF, VDD ≥ 2.7 V
-
-
-
7
ns
-
2.5
CL = 10 pF, VDD ≥1.8 V
-
-
3.5
CL = 10 pF, VDD ≥1.7 V
-
-
4
Pulse width of external signals
-
tEXTIpw detected by the EXTI
-
controller
10 -
-
ns
1. Guaranteed by design.
2. The I/O speed is configured using the OSPEEDRy[1:0] bits. Refer to the STM32F76xxx and STM32F77xxx reference
manual for a description of the GPIOx_SPEEDR GPIO port output speed register.
3. The maximum frequency is defined in Figure 39.
4. For maximum frequencies above 50 MHz and VDD > 2.4 V, the compensation cell should be used.
Figure 39. I/O AC characteristics definition






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