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Dram cas-before-ras refresh cycle, Dram self-refresh cycle, Burst rom read cycle – Epson S1C33210 User Manual

Page 97

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8 ELECTRICAL CHARACTERISTICS

S1C33210 PRODUCT PART

EPSON

A-83

DRAM CAS-before-RAS refresh cycle

BCLK

#RAS

#HCAS/
#LCAS

#WE

CBR refresh cycle

C

CBR1

C

CBR2

C

CBR3

t

RASD2

t

RASD1

t

CASD2

t

CASD1

;;;;;;;;

;;;;;;;;

;;;;;;

;;;;;;

;;;;;;;;

;;;;;;;;

;;;;;;

;;;;;;

DRAM self-refresh cycle

BCLK

#RAS

#HCAS/
#LCAS

Self-refresh mode setup

Self-refresh mode

t

CASD2

;;;;;;;

;;;;;;;

;;;;

;;;;

Self-refresh mode canceration

t

RASD2

t

RASD1

t

CASD1

6-cycle precharge

(Fixed)

Burst ROM read cycle

BCLK

A[23:2]

A[1:0]

#CEx

#RD

D[15:0]

SRAM read cycle

Burst cycle

Burst cycle

Burst cycle

t

AD

t

AD

t

AD

t

RDS

t

RDAC2

t

CEAC

t

RDH

t

CE2

t

CE1

t

RDD2

t

RDD1

;;;;;

;;;;;

t

AD

t

AD

t

AD

t

AD

t

ACC2

t

RDS

t

RDH

;;;;;

;;;;;

t

ACCB

t

RDS

t

RDH

;;;;;

;;;;;

t

ACCB

t

RDS

t

RDH

;;;;;

;;;;;

t

ACCB

1

1

t

RDH

is measured with respect to the first signal change (negation) from among the #RD, #CEx and A[23:0]

signals.