M69AR048B データシートの表示（PDF） - STMicroelectronics

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M69AR048B

32 Mbit (2Mb x16) 1.8V Asynchronous PSRAM

STMicroelectronics 

M69AR048B

Figure 21. Output Enable and Write Enable Controlled, Read and Write Mode AC Waveforms

A0-A20

tAXAV

E1

Low

tAVWL

W

tAVAX

WRITE ADDRESS

tAXAV

tAVAX(read)

READ ADDRESS

tAVQV

tWLWH

tWHAX

tAXAV

UB, LB

G

DQ0-DQ15

tGHQZ

tGHQX

DATA

OUT

tAVGL

tDVWH

DATA

IN

tGLQX

tWHDZ

tGLQV

tGHQZ

tGHQX

DATA

OUT

Note: E1 can be tied to Low for W and G controlled operation.

When E1 is tied to Low, output is exclusively controlled by G.

ai09810

Figure 22. Output Enable, Write Enable and UB/LB Controlled, Read/Write AC Waveforms

A0-A20

tAXAV

E1

Low

tAVAX

WRITE ADDRESS

tAXAV

tAVAX(read)

READ ADDRESS

tAVQV

tAXAV

W

UB, LB

tAVBL

G

tBHQZ

DQ0-DQ15

tBHQX

DATA

OUT

tBLBH

tBHAX

tBLQV

tAVGL

tDVBH

DATA

IN

tBLQX

tBHDZ

tBHQZ

tBHQX

DATA

OUT

Note: E1 can be tied to Low for W and G controlled operation.

When E1 is tied to Low, output is exclusively controlled by G.

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