STM32F769AI datasheet(224/255 Pages) STMICROELECTRONICS

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Electrical characteristics

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Table 123. Dynamic characteristics: SD / MMC characteristics, VDD=2.7V to 3.6V(1)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fPP

Clock frequency in data transfer mode

MHz

SDMMC_CK/fPCLK2 frequency ratio

8/3

tW(CKL)

Clock low time

fpp =50 MHz

9.5

10.5

tW(CKH)

Clock high time

fpp =50 MHz

8.5

9.5

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

tISU

Input setup time HS

fpp =50 MHz

3.5

tIH

Input hold time HS

fpp =50 MHz

2.5

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

tOV

Output valid time HS

fpp =50 MHz

tOH

Output hold time HS

fpp =50 MHz

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

tISUD

Input setup time SD

fpp =25 MHz

3.5

tIHD

Input hold time SD

fpp =25 MHz

2.5

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

tOVD

Output valid default time SD

fpp =25 MHz

0.5

1.5

tOHD

Output hold default time SD

fpp =25 MHz

1. Guaranteed by characterization results.

Table 124. Dynamic characteristics: eMMC characteristics, VDD=1.71V to 1.9V(1)(2)

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

fPP

Clock frequency in data transfer mode

MHz

SDMMC_CK/fPCLK2 frequency ratio

8/3

tW(CKL)

Clock low time

fpp =50 MHz

9.5

10.5

tW(CKH)

Clock high time

fpp =50 MHz

8.5

9.5

CMD, D inputs (referenced to CK) in eMMC mode

tISU

Input setup time HS

fpp =50 MHz

tIH

Input hold time HS

fpp =50 MHz

CMD, D outputs (referenced to CK) in eMMC mode

tOV

Output valid time HS

fpp =50 MHz

15.5

tOH

Output hold time HS

fpp =50 MHz

9.5

1. Guaranteed by characterization results.

2. Cload = 20 pF.

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