EDJ8232B5MB datasheet(29/142 Pages) ELPIDA

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EDJ8232B5MB

Data Sheet E1825E30 (Ver. 3.0)

ODT Measurement Definitions

Definitions for tAON, tAONPD, tAOF, tAOFPD and tADC are provided in the following table and subsequent figures.

Symbol

Begin Point Definition

End Point Definition

Figure

tAON

Rising edge of CK - /CK defined by the end point of

ODTLon

Extrapolated point at VSSQ

Figure a)

tAONPD

Rising edge of CK - /CK with ODT being first

registered high

Extrapolated point at VSSQ

Figure b)

tAOF

Rising edge of CK - /CK defined by the end point of

ODTLoff

End point: Extrapolated point at VRTT_Nom

Figure c)

tAOFPD

Rising edge of CK - /CK with ODT being first

registered low

End point: Extrapolated point at VRTT_Nom

Figure d)

tADC

Rising edge of CK - /CK defined by the end point of

ODTLcnw, ODTLcwn4 or ODTLcwn8

End point: Extrapolated point at VRTT_WR and

VRTT_Nom respectively

Figure e)

Reference Settings for ODT Timing Measurements

Measurement reference settings are provided in the following Table.

Measured Parameter

RTT_Nom Setting

RTT_WR Setting

VSW1 [V]

VSW2 [V]

Note

tAON

RZQ/4

N/A

0.05

0.10

RZQ/12

N/A

0.10

0.20

tAONPD

RZQ/4

N/A

0.05

0.10

RZQ/12

N/A

0.10

0.20

tAOF

RZQ/4

N/A

0.05

0.10

RZQ/12

N/A

0.10

0.20

tAOFPD

RZQ/4

N/A

0.05

0.10

RZQ/12

N/A

0.10

0.20

tADC

RZQ/12

RZQ/2

0.20

0.30

Begin point: Rising edge of CK - /CK

defined by the end point of ODTLon

End point: Extrapolated point at VSSQ

tAON

tSW2

VSW2

VSW1

tSW1

/CK

VSSQ

DQ, DM

DQS, /DQS

VTT

VSSQ

a) Definition of tAON

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