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 

Figure 17. Write Enable and UB/LB Controlled, Write AC Waveforms 3

A0-A20

E1 Low

tAVAX

ADDRESS VALID

tAXAV

tAVAX

ADDRESS VALID

tAXAV

M69AR048B

tAXAV

W

tAVBL

LB

tBLBH

tBHAX

tAVBL

tBLBH

tBHAX

UB

DQ0-DQ7

DQ8-DQ15

Note: E2 = High.

tDVBH

VALID DATA

INPUT

tBHDZ

tDVBH

VALID DATA

INPUT

tBHDZ

AI09806

Figure 18. Write Enable and UB/LB Controlled, Write AC Waveforms 4

A0-A20

tAVAX

ADDRESS VALID

tAVAX

ADDRESS VALID

tAXAV

tAXAV

E1 Low

tAXAV

W

tAVBL

LB

DQ0-DQ7

tAVBL

UB

DQ8-DQ15

Note: E2 = High.

tBHAX

tBLBH

tBLBH

tBLBH2

tDVBH

VALID DATA

INPUT

tBHDZ

tBLBH

tAVBL

tDVBH

tBHDZ

VALID DATA

INPUT

tBLBH2

tBLBH

tBHAX

tDVBH

VALID DATA

INPUT

tBHDZ tDVBH

VALID DATA

INPUT

tBHDZ

AI09807

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