Datasheet

DS9118 Rev 14 97/149
STM32F303xB STM32F303xC Electrical characteristics
125
SPI/I
2
S characteristics
Unless otherwise specified, the parameters given in Table 63 for SPI or in Table 64 for I
2
S
are derived from tests performed under ambient temperature, f
PCLKx
frequency and V
DD
supply voltage conditions summarized in
Table 24.
Refer to Section 6.3.14: I/O port characteristics for more details on the input/output alternate
function characteristics (NSS, SCK, MOSI, MISO for SPI and WS, CK, SD for I
2
S).
Table 63. SPI characteristics
(1)
Symbol Parameter Conditions Min Typ Max Unit
f
SCK
1/t
c(SCK)
SPI clock frequency
Master mode, SPI1
2.7<V
DD
<3.6
--
24
MHz
Slave mode, SPI1
2.7<V
DD
<3.6
24
Master mode, SPI1/2/3
2<V
DD
<3.6
18
Slave mode, SPI1/2/3
2<V
DD
<3.6
18
DuCy(
SCK) Duty cycle of SPI clock frequency Slave mode 30 50 70 %
t
su(NSS)
NSS setup time Slave mode, SPI presc = 2 4*Tpclk - -
ns
t
h(NSS)
NSS hold time Slave mode, SPI presc = 2 2*Tpclk - -
t
w(SCKH)
t
w(SCKL)
SCK high and low time Master mode Tpclk-2 Tpclk Tpclk+2
t
su(MI)
Data input setup time
Master mode 5.5 - -
t
su(SI)
Slave mode 6.5 - -
t
h(MI)
Data input hold time
Master mode 5 - -
t
h(SI)
Slave mode 5 - -
t
a(SO)
Data output access time Slave mode 0 - 4*Tpclk
t
dis(SO)
Data output disable time Slave mode 0 - 24
t
v(SO)
Data output valid time
Slave mode - 12 27
Slave mode, SPI1
2.7<V
DD
<3.6V
-1218
t
v(MO)
Master mode - 1.5 3
t
h(SO)
Data output hold time
Slave mode 11 - -
t
h(MO)
Master mode 0 - -
1. Guaranteed by characterization results.
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