Datasheet

Electrical characteristics STM32F401xB STM32F401xC
112/139 DS9716 Rev 11
Refer to Section 6.3.16: I/O port characteristics for more details on the input/output
characteristics.
Figure 44. SDIO high-speed mode
Figure 45. SD default mode
t
W(CKH)
CK
D, CMD
(output)
D, CMD
(input)
t
C
t
W(CKL)
t
OV
t
OH
t
ISU
t
IH
t
f
t
r
ai14887
CK
D, CMD
(output)
t
OVD
t
OHD
ai14888
Table 77. Dynamic characteristics: SD / MMC characteristics
(1)(2)
Symbol Parameter Conditions Min Typ Max Unit
f
PP
Clock frequency in data transfer mode - 0 - 48 MHz
- SDIO_CK/fPCLK2 frequency ratio - - - 8/3 -
t
W(CKL)
Clock low time fpp = 48MHz 8.5 9 -
ns
t
W(CKH)
Clock high time fpp = 48MHz 8.3 10 -
CMD, D inputs (referenced to CK) in MMC and SD HS mode
t
ISU
Input setup time HS fpp = 48MHz 3.5 - -
ns
t
IH
Input hold time HS fpp = 48MHz 0 - -
CMD, D outputs (referenced to CK) in MMC and SD HS mode
t
OV
Output valid time HS fpp = 48MHz - 4.5 7
ns
t
OH
Output hold time HS fpp = 48MHz 3 - -
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