EP9307 datasheet(21/48 Pages) CIRRUS

21 / 48 page

DS667PP3

EP9307

ARM9 SOC with Ethernet, USB, Display and Touchscreen

Static Memory 32-bit Read on 8-bit External Bus

Parameter

Symbol

Min

Typ

Max

Unit

AD setup to RDn assert time

tADs

tHCLK

-ns

RDn assert to Address 1 transition time

tAD1

tHCLK × (WST1 + 1)

-ns

Address 2 assert time

tAD2

tHCLK × (WST1 + 1)

-ns

Address 3 assert time

tAD3

tHCLK × (WST1 + 1)

-ns

AD transition to RDn deassert time

tAD4

tHCLK × (WST1 + 2)

-ns

AD hold from RDn deassert time

tADh

tHCLK × 2

-ns

RDn assert time

tRDpwL

tHCLK × (4 × WST1 + 5)

-ns

CSn assert to RDn assert delay time

tRDd

-0

CSn deassert to RDn deassert delay time

tRDh

-0

CSn assert to DQMn assert delay time

tDQMd

-0

CSn deassert to DQMn deassert delay time

tDQMh

-0

DA setup to AD transition time

tDAs1

-6

DA to RDn setup time

tDAs2

tHCLK + 6

-ns

AD transition to DA transition hold time

tDAh1

-0

RDn deassert to DA transition hold time

tDAh2

-0

Figure 8. Static Memory Multiple Word Read 8 Bit Cycle Timing Measurement

CSn

WRn

RDn

DQMn

AD 1

AD2

AD 3

DAs1

DQMh

RDh

DAh1

DAh

DAh1

DAs 1

DAs1

WAIT

RDd

DQMd

AD s

RD PwL

ADh

AD 4

DAs2

DAh2

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