Datasheet

Electrical characteristics STM32F446xC/E
174/202 DocID027107 Rev 6
Figure 66. SD default mode
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Table 105. Dynamic characteristics: SD / MMC characteristics
(1)(2)
Symbol Parameter Conditions Min Typ Max Unit
f
PP
Clock frequency in data transfer mode - 0 - 50 MHz
- SDIO_CK/fPCLK2 frequency ratio - - - 8/3 -
t
W(CKL)
Clock low time fpp =50MHz 9.5 10.5 -
ns
t
W(CKH)
Clock high time fpp =50MHz 8.5 9.5 -
CMD, D inputs (referenced to CK) in MMC and SD HS mode
t
ISU
Input setup time HS fpp =50MHz 1 - -
ns
t
IH
Input hold time HS fpp =50MHz 4.5 - -
CMD, D outputs (referenced to CK) in MMC and SD HS mode
t
OV
Output valid time HS fpp =50MHz - 12.5 13
ns
t
OH
Output hold time HS fpp =50MHz 11 - -
CMD, D inputs (referenced to CK) in SD default mode
t
ISUD
Input setup time SD fpp =25MHz
2.5 - -
ns
t
IHD
Input hold time SD fpp =25MHz
5.5 - -
CMD, D outputs (referenced to CK) in SD default mode
t
OVD
Output valid default time SD fpp =24MHz
-3.54
ns
t
OHD
Output hold default time SD fpp =24MHz
2--
1. Guaranteed based on test during characterization.
2. V
DD
= 2.7 to 3.6 V.
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