is42s16800d Integrated Silicon Solution, Inc., is42s16800d Datasheet - Page 34

• Manufacturer Part Number: is42s16800d
• Description: 16meg X 8, 8meg X16 128-mbit Synchronous Dram
• Manufacturer: Integrated Silicon Solution, Inc.

IS42S81600D,
34
Notes:
1) CAS latency = 2, Burst Length = 4
2) X16: A9 and A11 = "Don't Care"
ALTERNATING BANK READ ACCESSES
DQML, DQMH
X8: A11 = "Don't Care"
COMMAND
A0-A9, A11
BA0, BA1
DQM/
CKE
CLK
A10
DQ
t
t
CKS
CMS
t
t
t
BANK 0
AS
AS
AS
ACTIVE
ROW
ROW
T0
t
CKH
t
t
t
t
AH
AH
AH
CMH
IS42S16800D
t
t
t
t
RCD
RRD
RAS
RC
t
- BANK 0
CK
- BANK 0
- BANK 0
ENABLE AUTO PRECHARGE
T1
NOP
t
t
CMS
CL
COLUMN m
BANK 0
READ
T2
t
CMH
t
CH
(2)
CAS Latency - BANK 0
T3
NOP
t
LZ
t
AC
BANK 3
ACTIVE
ROW
ROW
T4
D
OUT
t
OH
m
t
AC
Integrated Silicon Solution, Inc. — www.issi.com
t
RCD
- BANK 3
ENABLE AUTO PRECHARGE
T5
D
NOP
OUT
t
OH
m+
t
1
AC
COLUMN b
BANK 3
READ
T6
D
OUT
t
OH
m+
t
(2)
RP
t
2
AC
CAS Latency - BANK 3
- BANK 0
T7
D
NOP
OUT
t
OH
m+
t
3
AC
BANK 0
ACTIVE
ROW
T8
ROW
DON'T CARE
D
OUT
t
OH
b
t
RCD
t
AC
- BANK 0
06/18/07
Rev. D