EM639165 Etron Technology Inc., EM639165 Datasheet - Page 6

• Manufacturer Part Number: EM639165
• Description: 8Mega x 16bits SDRAM
• Manufacturer: Etron Technology Inc.

Preliminary
FUNCTION TRUTH TABLE
Current State /CS /RAS /CAS /WE Address
ACTIVE
IDLE
ROW
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
H
H
H
X
H
H
H
H
L
L
L
L
L
L
L
L
X
H
H
H
H
X
H
H
H
H
L
L
L
L
L
L
L
X
H
X
H
H
X
H
H
H
H
L
L
L
L
L
L
L
BA
X
X
BA
BA, CA, A10
BA, RA
BA, A10
X
Op-Code,
Mode-Add
X
X
BA, CA, A10
BA, CA, A10
BA, RA
BA, A10
X
Op-Code,
Mode-Add
6
Command Action
WRITEA
WRITE /
READA
DESEL
READ /
DESEL
READ /
WRITE
TBST
PREA
TBST
PREA
PRE /
REFA
PRE /
REFA
MRS
MRS
NOP
ACT
NOP
ACT
NOP
NOP
ILLEGAL*2
ILLEGAL*2
NOP*4
Auto-Refresh*5
Mode Register Set*5
NOP
NOP
NOP
Begin Read, Latch CA, Determine
Auto-Precharge
Begin Write, Latch CA, Determine
Auto-Precharge
Precharge / Precharge All
ILLEGAL
ILLEGAL
Bank Active, Latch RA
Bank Active / ILLEGAL*2
Rev 1.0
EM639165
Feb. 2001