NetduinoPlus2 Netduino, NetduinoPlus2 Datasheet - Page 108

• Manufacturer Part Number: NetduinoPlus2
• Description: Development Boards & Kits - ARM NETDUINO PLUS 2
• Manufacturer: Netduino

Specifications of NetduinoPlus2

• Rohs: yes
• Product: Development Boards
• Tool Is For Evaluation Of: STM32F405RG
• Core: ARM Cortex M4
• Interface Type: I2C, SPI, UART, USB
• Operating Supply Voltage: 7.5 v to 9 V
• Data Bus Width: 32 bit
• Description/function: Arduino form factor
• Dimensions: 2.8 in x 2.1 in
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C

Electrical characteristics
Table 48.
1. Based on characterization data, not tested in production.
2. The I/O speed is configured using the OSPEEDRy[1:0] bits. Refer to the STM32F20/21xxx reference manual for a
3. TBD stands for “to be defined”.
4. The maximum frequency is defined in
5. For maximum frequencies above 50 MHz, the compensation cell should be used.
108/180
OSPEEDRy
[1:0] bit
value
description of the GPIOx_SPEEDR GPIO port output speed register.
11
-
(1)
I/O AC characteristics
F
Figure 35. I/O AC characteristics definition
Symbol
max(IO)out
t
t
t
r(IO)out
EXTIpw
f(IO)out
Maximum frequency
Output high to low level fall
time
Output low to high level rise
time
Pulse width of external signals
detected by the EXTI
controller
EXT ERNAL
OUTPUT
ON 50pF
Maximum frequency is achieved if (t r + t f ) ≤ 2/3)T and if the duty cycle is (45-55%)
Parameter
Figure
(1)(2)(3)
t r(I O)out
35.
(4)
Doc ID 022152 Rev 3
(continued)
10%
50%
when loaded by 50pF
C
C
C
C
C
C
C
C
L
L
L
L
L
L
L
L
90%
= 20 pF, 2.4 < V
= 20 pF, 2.4 < V
= 30 pF, V
= 30 pF, V
= 10 pF, V
= 10 pF, V
= 10 pF, V
= 10 pF, V
Conditions
T
DD
DD
DD >
DD >
DD >
DD >
10%
> 2.7 V
> 2.7 V
50%
2.70 V
1.8 V
2.70 V
1.8 V
DD
DD
90%
< 2.7 V
< 2.7 V
t r(I O)out
STM32F405xx, STM32F407xx
Min
10
-
-
-
-
-
-
-
-
Typ
-
-
-
-
-
-
-
-
-
100
200
50
Max
TBD
TBD
TBD
TBD
TBD
ai14131
-
(5)
(5)
(5)
MHz
Unit
ns
ns