Datasheet

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STM32F412xE/G Electrical characteristics
161
QSPI interface characteristics
Unless otherwise specified, the parameters given in the following tables for QSPI are
derived from tests performed under the ambient temperature, f
AHB
frequency and V
DD
supply voltage conditions summarized in Table 15, with the following configuration:
• Output speed is set to OSPEEDRy[1:0] = 11
• Capacitive load C=20pF
• Measurement points are done at CMOS levels: 0.5VDD
Refer to Section 6.3.16: I/O port characteristics for more details on the input/output alternate
function characteristics.
Table 66. QSPI dynamic characteristics in SDR mode
(1)
1. Guaranteed by characterization results, not tested in production.
Symbol Parameter Conditions Min Typ Max Unit
f
SCK
1/t
c(SCK)
QSPI clock
frequency
Write mode
1.71 V≤V
DD
≤3.6 V
C
load
= 15 pF
--80
MHz
Read mode
2.7 V<V
DD
<3.6 V
C
load
= 15 pF
- - 100
1.71 V≤V
DD
≤3.6 V - - 50
t
w(CKH)
QSPI clock high
and low
-
(T
(CK)
/ 2)-1 - T
(CK)
/ 2
ns
t
w(CKL)
T
(CK)
/ 2) - (T
(CK)
/ 2)+1
t
s(IN)
Data input setup
time
-0.5--
t
h(IN)
Data input hold
time
- 3.5--
t
v(OUT)
Data output valid
time
--11.5
t
h(OUT)
Data output hold
time
-0.5--
Table 67. QSPI dynamic characteristics in DDR mode
(1)
Symbol Parameter Conditions Min Typ Max Unit
f
SCK
1/t
c(SCK)
QSPI clock
frequency
Write mode
1.71 V≤V
DD
≤3.6 V
C
load
= 15 pF
--80
MHz
Read mode
2.7 V<V
DD
<3.6 V
C
load
= 15 pF
- - 80
1.71 V≤V
DD
≤3.6 V - - 50
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