STM32F446VC datasheet(173/201 Pages) STMICROELECTRONICS

173 / 201 page

DocID027107 Rev 5

173/201

STM32F446xC/E

Electrical characteristics

174

Figure 66. SD default mode

Table 105. Dynamic characteristics: SD / MMC characteristics(1)(2)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fPP

Clock frequency in data transfer mode

MHz

SDIO_CK/fPCLK2 frequency ratio

8/3

tW(CKL)

Clock low time

fpp =50MHz

9.5

10.5

tW(CKH)

Clock high time

fpp =50MHz

8.5

9.5

CMD, D inputs (referenced to CK) in MMC and SD HS mode

tISU

Input setup time HS

fpp =50MHz

tIH

Input hold time HS

fpp =50MHz

4.5

CMD, D outputs (referenced to CK) in MMC and SD HS mode

tOV

Output valid time HS

fpp =50MHz

12.5

tOH

Output hold time HS

fpp =50MHz

CMD, D inputs (referenced to CK) in SD default mode

tISUD

Input setup time SD

fpp =25MHz

2.5

tIHD

Input hold time SD

fpp =25MHz

5.5

CMD, D outputs (referenced to CK) in SD default mode

tOVD

Output valid default time SD

fpp =24MHz

-3.5

tOHD

Output hold default time SD

fpp =24MHz

1. Guaranteed based on test during characterization.

2. VDD = 2.7 to 3.6 V.

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