IMX8MMIEC datasheet(39/92 Pages) NXP

39 / 92 page

Electrical characteristics

i.MX 8M Mini Applications Processor Datasheet for Industrial Products, Rev. 1, 07/2020

NXP Semiconductors

3.9.2.4

HS200 Mode AC timing

Figure 15 depicts the timing of HS200 mode, and Table 33 lists the HS200 timing characteristics.

Figure 15. HS200 timing

iti

SD6

uSDHC input skew

tRQ

—0.45

SD7

uSDHC hold skew

tRQH

—0.45

Table 33. HS200 interface timing specification

Parameter

Symbols

Min

Max

Unit

Card Input Clock

SD1

Clock Frequency Period

tCLK

5.0

—

SD2

Clock Low Time

tCL

0.3 x tCLK

0.7 x tCLK

SD3

Clock High Time

tCH

0.3 x tCLK

0.7 x tCLK

uSDHC Output/Card Inputs SD_CMD, SDx_DATAx in HS200 (Reference to CLK)

SD5

uSDHC Output Delay

tOD

-1.6

uSDHC Input/Card Outputs SD_CMD, SDx_DATAx in HS200 (Reference to CLK)1

1 HS200 is for 8 bits while SDR104 is for 4 bits.

SD8

uSDHC Output Data Window

tODW

0.5 x tCLK

—ns

Table 32. HS400 interface timing specification (continued)

Parameter

Symbols

Min

Max

Unit

SCK

8-bit output from uSDHC to eMMC

8-bit input from eMMC to uSDHC

SD8

SD4/SD5

SD2

SD3

SD1

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