Datasheet

Electrical characteristics STM32F412xE/G
126/193 DocID028087 Rev 4
FMPI
2
C characteristics
The following table presents FMPI
2
C characteristics.
Refer also to Section 6.3.16: I/O port characteristics for more details on the input/output
function characteristics (SDA and SCL).
Table 63. FMPI
2
C characteristics
(1)
Parameter
Standard mode Fast mode Fast+ mode
Unit
Min Max Min Max Min Max
f
FMPI2CC F
MPI2CCLK
frequency 2 - 8 - 18 -
µs
t
w(SCLL) SCL clock low time 4.7 - 1.3 - 0.5 -
t
w(SCLH) SCL clock high time 4.0 - 0.6 - 0.26 -
t
su(SDA) SDA setup time 0.25 - 0.10 - 0.05 -
t
H(SDA) SDA data hold time 0 - 0 - 0 -
t
v(SDA,ACK) Data, ACK valid time - 3.45 - 0.9 - 0.45
t
r(SDA)
t
r(SCL)
SDA and SCL rise time - 1.0 - 0.30 - 0.12
t
f(SDA)
t
f(SCL)
SDA and SCL fall time - 0.30 - 0.30 - 0.12
t
h(STA) Start condition hold time 4 - 0.6 - 0.26 -
t
su(STA)
Repeated Start condition
setup time
4.7 - 0.6 - 0.26 -
t
su(STO) Stop condition setup time 4 - 0.6 - 0.26 -
t
w(STO:STA)
Stop to Start condition time
(bus free)
4.7 - 1.3 - 0.5 -
t
SP
Pulse width of the spikes that
are suppressed by the
analog filter for standard and
fast mode
- - 0.05 0.1 0.05 0.1
C
b
Capacitive load for each bus
Line
- 400 - 400 -
550
(2)
pF
1. Based on characterization results, not tested in production.
2. Can be limited. Maximum supported value can be retrieved by referring to the following formulas:
t
r(SDA/SCL)
= 0.8473 x R
p
x C
load
R
p(min)
= (V
DD
-V
OL(max)
) / I
OL(max)
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