P2V28S20ATP-7 查看數據表（PDF） - Vanguard International Semiconductor
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P2V28S20ATP-7 Datasheet PDF : 51 Pages
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128Mb Synchronous DRAM
P2V28S20ATP-7,-75,-8 (4-BANK x 8,388,608-WORD x 4-BIT)
P2V28S30ATP-7,-75,-8 (4-BANK x 4,194,304-WORD x 8-BIT)
P2V28S40ATP-7,-75,-8 (4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE (continued)
Current State /CS /RAS /CAS /WE Address
Command Action
READ
H X X XX
DESEL NOP (Continue Burst to END)
WRITE
L
H H HX
NOP NOP (Continue Burst to END)
L
HH
L BA
TBST Terminate Burst
READ Terminate Burst, Latch CA,Begin
L H L H BA, CA, A10
/READA Read, Determine Auto-Precharge*3
WRITE / Terminate Burst, Latch CA,Begin
L
HL
L BA, CA, A10 WRITEA Write, Determine Auto-Precharge*3
L
L H H BA, RA
ACT Bank Active / ILLEGAL*2
L
L H L BA, A10
PRE /
PREA Terminate Burst, Precharge
L
LL
HX
REFA ILLEGAL
Op-Code,
L
LL
L
Mode-Add
MRS ILLEGAL
H X X XX
DESEL NOP (Continue Burst to END)
L H H HX
NOP NOP (Continue Burst to END)
L
HH
L BA
TBST Terminate Burst, Latch CA,Begin
READ / Terminate Burst, Latch CA,Begin
L H L H BA, CA, A10
READA Read, Determine Auto-Precharge*3
L
HL
L BA, CA, A10 WRITE / Terminate Burst, Latch CA,Begin
WRITEA Write, Determine Auto-Precharge*3
L
L H H BA, RA
ACT Bank Active / ILLEGAL*2
L
L H L BA, A10
PRE /
PREA
Terminate Burst, Precharge
L
LL
HX
REFA ILLEGAL
L
LL
L Op-Code,
Mode-Add
MRS ILLEGAL
JULY.2000
Page-8
Rev.2.2
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