STM32L-DISCOVERY STMicroelectronics, STM32L-DISCOVERY Datasheet - Page 94
STM32L-DISCOVERY
Manufacturer Part Number
STM32L-DISCOVERY
Description
BOARD, EVAL, STM32L-DISCOVERY
Manufacturer
STMicroelectronics
Series
STM32r
Type
MCUr
Specifications of STM32L-DISCOVERY
Kit Contents
Board, Debugger, Programmer And Compiler
Features
128KB Flash Plus Multiple Timers, Analogue Peripherals
Silicon Manufacturer
ST Micro
Core Architecture
ARM
Core Sub-architecture
Cortex - M3
Silicon Core Number
STM32
Silicon Family Name
STM32F1xx
Rohs Compliant
Yes
Contents
Board
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
STM32L
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
STM32L-DISCOVERY
Manufacturer:
STMicroelectronics
Quantity:
18
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Electrical characteristics
Table 43.
1. The I/O speed is configured using the OSPEEDRy[1:0] bits. Refer to the STM32F20/21xxx reference manual for a
2. TBD stands for “to be defined”.
3. The maximum frequency is defined in
4. For maximum frequencies above 50 MHz, the compensation cell should be used.
94/163
OSPEEDRy
[1:0] bit
value
description of the GPIOx_SPEEDR GPIO port output speed register.
11
-
(1)
I/O AC characteristics
F
Figure 36. 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)
t r(I O)out
36.
(continued)
(3)
Doc ID 15818 Rev 6
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
STM32F205xx, STM32F207xx
Min
10
-
-
-
-
-
-
-
-
Typ
-
-
-
-
-
-
-
-
-
100
200
50
Max
TBD
TBD
TBD
TBD
TBD
ai14131
-
(4)
(4)
(4)
MHz
Unit
ns
ns
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