K4G323222A Datasheet, PDF (46/49 Pages) Samsung semiconductor – 32Mbit SGRAM

K4G323222A
CMOS SGRAM
FUNCTION TRUTH TABLE(TABLE 1)
Current
State
IDLE
Row
Active
Read
Write
CS RAS CAS WE
H
X
X
X
L
H
H
H
L
H
H
L
L
H
L
X
L
L
H
H
L
L
H
L
L
L
H
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
L
H
X
X
X
L
H
H
H
L
H
H
L
L
H
L
H
L
H
L
H
L
H
L
L
L
H
L
L
L
L
H
H
L
L
H
L
L
L
H
L
L
L
L
H
L
L
L
L
L
L
L
L
H
X
X
X
L
H
H
H
L
H
H
L
L
H
H
L
L
H
L
H
L
H
L
H
L
H
L
L
L
H
L
L
L
L
H
H
L
L
H
L
L
L
H
L
L
L
L
X
H
X
X
X
L
H
H
H
L
H
H
L
L
H
H
L
L
H
L
H
L
H
L
H
L
H
L
L
L
H
L
L
DSF
X
X
X
X
L
L
H
L
H
L
H
X
X
X
L
H
L
H
X
L
H
X
L
H
X
X
L
H
L
H
L
H
X
L
H
X
X
X
L
H
L
H
L
H
BA ADDR
ACTION
X
X
X
X
X
X
BA
CA
BA
RA
BA
PA
X
X
X
X
X
X
OP Code
OP Code
X
X
X
X
X
X
BA CA,AP
X
X
BA CA,AP
BA CA,AP
BA
RA
BA
PA
X
X
X
X
X
X
OP Code
X
X
X
X
X
X
X
X
BA CA,AP
X
X
BA CA,AP
BA CA.AP
BA
RA
BA
PA
X
X
X
X
X
X
X
X
X
X
X
X
BA CA,AP
X
X
BA CA,AP
BA CA,AP
NOP
NOP
ILLEGAL
ILLEGAL
Row Active ; Latch Row Address ; Non-IO Mask
NOP
ILLEGAL
Auto Refresh or Self Refresh
ILLEGAL
Mode Register Access
Special Mode Register Access
NOP
NOP
ILLEGAL
Begin Read ; Latch CA ; Determine AP
ILLEGAL
Begin Write ;Latch CA ; Determine AP
Block Write ;Latch CA ; Determine AP
ILLEGAL
Precharge
ILLEGAL
ILLEGAL
ILLEGAL
Special Mode Register Access
NOP(Continue Burst to End --> Row Active)
NOP(Continue Burst to End --> Row Active)
Term burst --> Row active
ILLEGAL
Term burst ; Begin Read ; Latch CA ; Determine AP
ILLEGAL
Term burst ; Begin Write ; Latch CA ; Determine AP
Term burst ; Block Write ; Latch CA ; Determine AP
ILLEGAL
Term Burst ; Precharge timing for Reads
ILLEGAL
ILLEGAL
NOP(Continue Burst to End --> Row Active)
NOP(Continue Burst to End --> Row Active)
Term burst --> Row active
ILLEGAL
Term burst ; Begin Read ; Latch CA ; Determine AP
ILLEGAL
Term burst ; Begin Write ; Latch CA ; Determine AP
Term burst ; Block Write ; Latch CA ; Determine AP
NOTE
2
2
4
5
5
6
2
2
6
3
3
3
2
3
3
3
3
Rev. 1.3 (Dec. 2000)
- 46