STM32F103C4H6ATR STMICROELECTRONICS [STMicroelectronics], STM32F103C4H6ATR Datasheet - Page 57

• Manufacturer Part Number: STM32F103C4H6ATR
• Description: Low-density performance line, ARM-based 32-bit MCU with 16 or 32 KB Flash, USB, CAN, 6 timers, 2 ADCs, 6 communication interfaces
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

5.3.15
Communications interfaces
I
Unless otherwise specified, the parameters given in
performed under the ambient temperature, f
conditions summarized in
The STM32F103xx performance line I
I
mapped to are not “true” open-drain. When configured as open-drain, the PMOS connected
between the I/O pin and V
The I
characteristics
and SCL) .
Table 39.
1. Guaranteed by design, not tested in production.
2. f
3. The maximum hold time of the Start condition has only to be met if the interface does not stretch the low
4. The device must internally provide a hold time of at least 300ns for the SDA signal in order to bridge the
2
2
t
C communication protocol with the following restrictions: the I/O pins SDA and SCL are
C interface characteristics
w(STO:STA)
Symbol
t
t
t
t
t
w(SCLH)
t
w(SCLL)
higher than 4 MHz to achieve the maximum fast mode I
period of SCL signal.
undefined region of the falling edge of SCL.
su(SDA)
t
t
t
t
t
su(STO)
su(STA)
h(SDA)
PCLK1
r(SDA)
h(STA)
r(SCL)
f(SDA)
f(SCL)
C
2
C characteristics are described in
b
must be higher than 2 MHz to achieve the maximum standard mode I
SCL clock low time
SCL clock high time
SDA setup time
SDA data hold time
SDA and SCL rise time
SDA and SCL fall time
Start condition hold time
Repeated Start condition
setup time
Stop condition setup time
Stop to Start condition time
(bus free)
Capacitive load for each bus
line
I
2
C characteristics
for more details on the input/output alternate function characteristics (SDA
Parameter
Table
DD
is disabled, but is still present.
Doc ID 15060 Rev 3
9.
2
C interface meets the requirements of the standard
Standard mode I
Table
Min
250
0
4.7
4.0
4.0
4.7
4.0
4.7
PCLK1
(3)
39. Refer also to
2
C frequency.
frequency and V
Table 39
1000
Max
300
400
2
C
(1)
are derived from tests
20 + 0.1C
Section 5.3.12: I/O port
Fast mode I
2
Min
100
C frequency. It must be
0
1.3
0.6
0.6
0.6
0.6
1.3
(4)
DD
supply voltage
b
2
C
900
Max
300
300
400
(1)(2)
(3)
Unit
pF
µs
ns
µs
s
s
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