km4132g271b Samsung Semiconductor, Inc., km4132g271b Datasheet - Page 48

• Manufacturer Part Number: km4132g271b
• Description: 128k X 32bit X 2 Banks Synchronous Graphic Ram Lvttl
• Manufacturer: Samsung Semiconductor, Inc.

KM4132G271B
FUNCTION TRUTH TABLE(TABLE 1)
Current
Active
State
Read
Write
IDLE
Row
CS
H
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
RAS
X
H
H
H
X
H
H
H
H
H
H
X
H
H
H
H
H
H
H
X
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
CAS
X
H
H
H
H
H
H
X
H
H
H
H
H
X
H
H
H
H
H
H
X
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
WE
X
H
X
H
H
H
H
X
H
H
H
H
H
X
H
H
H
H
X
X
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
DSF
X
X
X
X
L
H
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
(A
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
9
OP Code
OP Code
OP Code
)
- 48
CA,AP
CA,AP
CA,AP
CA,AP
CA,AP
CA.AP
CA,AP
CA,AP
CA,AP
ADDR
CA
RA
RA
PA
RA
PA
RA
PA
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
NOP
NOP
ILLEGAL
ILLEGAL
Row Active ; Latch Row Address ; Non-IO Mask
Row Active ; Latch Row Address ; 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
ACTION
Rev. 2.4 (May 1998)
CMOS SGRAM
NOTE
2
2
4
5
5
6
2
2
6
3
3
3
2
3
3
3
3