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HS400 Device Output Timing

The Data Strobe is used to read data in HS400 mode. The Data Strobe is toggled only during data read or CRC

status response.

Figure 23: HS400 Device output timing

Table 31 HS400 Device Output timing

Parameter

Symbol

Min.

Max.

Unit

Remark

Data Strobe

Cycle time data transfer

mode

tPERIOD

200MHz(Max), between rising edges With

respect to VT

Slew rate

1.125

V/ns

With respect to VOH/VOL and HS400 reference

load

Duty cycle distortion

tDSDCD

0.0

0.2

Allowable deviation from the input CLK duty

cycle distortion (tCKDCD)

With respect to VT

Includes jitter, phase noise

Minimum pulse width

tDSMPW

2.0

With respect to VT

Read pre-amble

tRPRE

0.4

tPERIOD

Max value is specified by manufacturer.

Value up to infinite is valid

Read post-amble

tRPST

0.4

tPERIOD

Max value is specified by manufacturer.

Value up to infinite is valid

Output DAT (referenced to Data Strobe)

Output skew

tRQ

0.4

With respect to VOH/VOL and HS400 reference

load

Output hold skew

tRQH

0.4

With respect to VOH/VOL and HS400 reference

load.

Slew rate

1.125

V/ns

With respect to VOH/VOL and HS400 reference

load

Confidential

-33

／42-

Rev.1.0 July 2023

32GB/64GB/128GB eMMC

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