STM32F205VE 查看數據表（PDF） - STMicroelectronics

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STM32F205VE

ARM-based 32-bit MCU, 150DMIPs, up to 1 MB Flash/128+4KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

STMicroelectronics 

STM32F20xxx

Electrical characteristics

Table 46. I/O AC characteristics(1)(2) (continued)

OSPEEDRy

[1:0] bit

value(1)

Symbol

Parameter

Conditions

Min Typ Max Unit

Fmax(IO)out Maximum frequency(3)

CL = 30 pF, VDD > 2.70 V

CL = 30 pF, VDD > 1.8 V

CL = 10 pF, VDD > 2.70 V

-

- 100(4)

-

-

50(4)

MHz

-

- 200(4)

CL = 10 pF, VDD > 1.8 V

-

- TBD

11

tf(IO)out

Output high to low level fall

time

CL = 20 pF, 2.4 < VDD < 2.7 V -

CL = 10 pF, VDD > 2.7 V

-

- TBD

- TBD

ns

tr(IO)out

Output low to high level rise

time

CL = 20 pF, 2.4 < VDD < 2.7 V

CL = 10 pF, VDD > 2.7 V

-

-

- TBD

- TBD

Pulse width of external signals

-

tEXTIpw detected by the EXTI

controller

10 -

-

ns

1. The I/O speed is configured using the OSPEEDRy[1:0] bits. Refer to the STM32F20/21xxx reference manual for a

description of the GPIOx_SPEEDR GPIO port output speed register.

2. TBD stands for “to be defined”.

3. The maximum frequency is defined in Figure 36.

4. For maximum frequencies above 50 MHz, the compensation cell should be used.

Figure 36. I/O AC characteristics definition

90%

50%

10%

10%

50%

90%

EXT ERNAL

O UTP UT

ON 50pF

tr(I O)out

tr(I O)out

T

Maximum fr equency is achieved if (tr + tf) 2/3) T and if the duty cycle is (45-55%)

when loaded by 50pF

ai14131

Doc ID 15818 Rev 9

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