ICSI IC42S16400 1m x 16bit x 4 banks (64-mbit) sdram Datasheet

IC42S16400
Document Title
1M x 16Bit x 4 Banks (64-MBIT) SDRAM
Revision History
Revision No
History
Draft Date
0A
0B
0C
Initial Draft
Revise DC OPERATING CONDITIONS
1. add -6ns speed grade
2. obsolete 8Mx8 configuration
3. obsolete Low power version
4. obsolete -8ns speed grade
Add 60 ball(64M SDRAM) VF-BGA package
Add Pb-free package
Demcember 20,2001
April 15,2002
Novembver 22,2002
0D
0E
Remark
September 05,2003
December 02,2003
The attached datasheets are provided by ICSI. Integrated Circuit Solution Inc reserve the right to change the specifications and
products. ICSI will answer to your questions about device. If you have any questions, please contact the ICSI offices.
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
1
IC42S16400
1M x 16 Bits x 4 Banks (64-MBIT)
SYNCHRONOUS DYNAMIC RAM
FEATURES
DESCRIPTION
• Single 3.3V (± 0.3V) power supply
• High speed clock cycle time -6: 166MHz,
-7: 133MHz<3-3-3>
• Fully synchronous operation referenced to clock
rising edge
• Possible to assert random column access in
every cycle
• Quad internal banks contorlled by A12 & A13
(Bank Select)
• Byte control by LDQM and UDQM for
IC42S16400
• Programmable Wrap sequence (Sequential /
Interleave)
• Programmable burst length (1, 2, 4, 8 and full
page)
• Programmable CAS latency (2 and 3)
• Automatic precharge and controlled precharge
• CBR (Auto) refresh and self refresh
• LVTTL compatible inputs and outputs
• 4,096 refresh cycles / 64ms
• Burst termination by Burst stop and Precharge
command
• Package 400mil 54-pin TSOP-2 and 60ball(64M)
VF-BGA
• Pb(lead)-free package is available
The IC42S16400 are high-speed 67,108,864-bit synchronous dynamic random-access memories, organized as 1,048,576 x 16 x 4 (word x bit x bank),
respectively.
The synchronous DRAMs achieved high-speed data
transfer using the pipeline architecture and clock
frequency up to 166MHz for -6. All input and outputs are
synchronized with the positive edge of the clock.The
synchronous DRAMs are compatible with Low Voltage
TTL (LVTTL).These products are packaged in 54-pin
TSOP-2 and 60ball(64M) VF-BGA.
PIN CONFIGURATIONS
54-Pin TSOP-2
VDD
1
54
VSS
DQ0
2
53
DQ15
VDDQ
3
52
VSSQ
DQ1
4
51
DQ14
DQ2
5
50
DQ13
VSSQ
6
49
VDDQ
DQ3
7
48
DQ12
DQ4
8
47
DQ11
VDDQ
9
46
VSSQ
DQ5
10
45
DQ10
DQ6
11
44
DQ9
VSSQ
12
43
VDDQ
DQ7
13
42
DQ8
VDD
14
41
VSS
LDQM
15
40
NC
WE
16
39
UDQM
CAS
17
38
CLK
RAS
18
37
CKE
CS
19
36
NC
BA0
20
35
A11
BA1
21
34
A9
A10
22
33
A8
A0
23
32
A7
A1
24
31
A6
A2
25
30
A5
A3
26
29
A4
VDD
27
28
VSS
ICSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors
which may appear in this publication. © Copyright 2000, Integrated Circuit Solution Inc.
2
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
60-BALL VF-BGA ( 64M SDRAM )
7
VDD
A1
A10
BA0
CS
CAS
WE
NC
DQ7
DQ6
DQ5
DQ3
DQ2
DQ1
VDD
6
A3
A2
A0
BA1
NC
RAS
LDQM
VDD
NC
VSSQ
VDDQ
DQ4
VSSQ
VDDQ
DQ0
A4
A5
A7
A9
NC
CLK
UDQM
NC
NC
VDDQ
VSSQ
DQ11
VDDQ
VSSQ
DQ15
VSS
A6
A8
A11
CKE
NC
NC
NC
DQ8
DQ9
DQ10
DQ12
DQ13
DQ14
VSS
R
P
N
M
L
K
J
H
G
F
B
A
5
4
3
2
1
E
D
C
PIN DESCRIPTIONS
A0 - A11
Address
Row Address : RA0 - RA11, Column Address : CA0 - CA7
Auto-precharge flag : A10
BA0,BA1
Bank Address
Selects bank to be activated during RAS activity
Selects bank to be read/written during CAS activity
DQ0 - DQ15
Data Input/Output
Multiplexed data input / output pin
CLK
Clock
The system clock input.All other inputs are registered to the SDRAM
on the rising edge of CLK
CKE
Clock Enable
Controls internal clock signal and when deactivated,the SDRAM will
be one of the states among power down,suspend or self refresh
CS
Chip Select
Enables or disables all inputs except CLK, CKE and DQM
RAS
CAS
WE
Row Address Strobe
Column Address Strobe
Write Enable
RAS,CAS and WE define the operation
Refer function truth table for details
LDQM,UDQM
Data Input/Output Mask
Controls output buffers in read mode and masks input data in write
mode
VDD/VSS
Power Supply/Ground
Power supply for internal circuits and input buffers
VDDQ/VSSQ
Data Output Power/Ground
Power supply for output buffers
NC
No Connection
No Connection
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
3
IC42S16400
FUNCTIONAL BLOCK DIAGRAM
Clock
Generator
Address
Mode
Register
Row
Address
Buffer
&
Refresh
Counter
Bank D
Bank C
Bank B
Row Decoder
CLK
CKE
Bank A
4
DQM
Data Control Circuit
Input & Output
Buffer
Column
Address
Buffer
&
Burst
Counter
Column Decoder &
Latch Circuit
Latch Circuit
CAS
WE
Control Logic
RAS
Command Decoder
Sense Amplifier
CS
DQ
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Parameters
VDD
VDDQ
Supply Voltage (with respect to VSS)
–0.5 to +4.6
Supply Voltage for Output (with respect to VSSQ)
–0.5 to +4.6
Input Voltage (with respect to VSS)
–0.5 to VDD+0.5
Output Voltage (with respect to VSSQ)
–1.0 to VDDQ+0.5
Short circuit output current
50
Power Dissipation (TA = 25 °C)
1
VI
VO
IO
PD
TOPT
TSTG
Rating
Operating Temperature
Storage Temperature
Unit
0 to +70
–65 to +150
V
V
V
V
mA
W
°C
°C
Notes:
1. Exposing the device to stress above those listed in Absolute Maximum Ratings could cause permanent
damage. The device is not meant to be operated under conditions outside the limits described in the
operational section of this specification. Exposure to Absolute Maximum Rating conditions for extended
periods may affect device reliability.
DC RECOMMENDED OPERATING CONDITIONS
(At TA = 0 to +70°C unless otherwise noted)
Symbol
VDD
VDDQ
VIH
VIL
Parameter
Min.
Typ.
Max.
Unit
Supply Voltage
Supply Voltage for DQ
High Level Input Voltage (all Inputs)
Low Level Input Voltage (all Inputs)
3.0
3.0
2.0
-0.3
3.3
3.3
—
—
3.6
3.6
VDD + 0.3
+0.8
V
V
V
V
CAPACITANCE CHARACTERISTICS
(At TA = 0 ~ 70°C, VDD = VDDQ = 3.3 ± 0.3V, VSS = VSSQ = 0V , unless otherwise noted)
Symbol
Parameter
CIN
CCLK
CI/O
Input Capacitance, address & control pin
Input Capacitance, CLK pin
Data Input/Output Capacitance
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
Min.
Max.
Unit
2.5
2.5
4.0
3.8
3.5
6.5
pF
pF
pF
5
IC42S16400
DC ELECTRICAL CHARACTERISTICS
(At TA = 0 ~ 70°C, VDD = VDDQ = 3.3 ± 0.3V, VSS = VSSQ = 0V , unless otherwise noted)
Symbol Parameter
Test Condition
ICC1(1)
Operating Current
ICC2P
Precharge Standby Current
(In Power-Down Mode)
One Bank active,
Burst Length=1
tRC = tRC (min.)
tCLK = tCLK (min.)
CKE < VIL (MAX)
ICC2PS
ICC2N(2)
Precharge Standby Current
(In Non Power-Down Mode)
ICC2NS
ICC3P
Active Standby Current
(In Power-Down Mode)
ICC3PS
ICC3N(2)
Active Standby Current
(In Non Power-Down Mode)
ICC3NS
Speed
Min.
Max.
Unit
-6(42S16400)
-7(42S16400)
—
—
95
85
mA
mA
-6
-7
CKE < VIL (MAX)
CLK < VIL (MAX)
-6
-7
CS > VCC -0.2V
tCK = 15 ns
-6
CKE > VIH (MIN)
-7
CS > VCC -0.2V
CKE < VIL (MAX)
-6
CKE > VIH (MIN) All input signals are stable. -7
CKE < VIL (MAX)
tCK = 10 ns
-6
-7
CKE < VIL (MAX)
CLK < VIL (MAX)
-6
-7
CS > VCC -0.2V
tCK = 15 ns
-6
CKE > VIH (MIN)
-7
CS > VCC -0.2V
CKE < VIL (MAX)
-6
CKE > VIH (MIN) All input signals are stable. -7
All Banks active
CAS latency = 3 -6(42S16400)
Burst Length=1
-7(42S16400)
tCK = tCK (MIN)
tRC = tRC (MIN)
-6
tCLK = tCLK (MIN)
-7
CKE < 0.2V
-6
-7
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
2
1
1
20
20
15
15
7
7
5
5
30
30
25
25
130
100
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
—
—
—
—
150
130
1
1
mA
mA
mA
mA
–5
5
µA
–5
5
µA
2.4
—
—
0.4
V
V
CAS latency = 3
tCK = 15 ns
ICC4
Operating Current
(In Burst Mode)
ICC5
Auto-Refresh Current
ICC6(3, 4)
Self-Refresh Current
IIL
Input Leakage Current
0V < VIN < VDD (MAX)
(Inputs)
Pins not under test = 0V
Output Leakage Current
Output is disabled DQ# in H - Z.,
0V < VOUT < VDD (MAX)
IOUT = –2 mA
IOUT = +2 mA
IOL
(I/O pins)
VOH
VOL
High Level Output Voltage
Low Level Output Voltage
Notes:
1. ICC(max) is specified at the output open condition.
2. Input signals are changed one time during 30ns.
6
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
AC TEST CONDITIONS
(At TA = 0 ~ 70°C, VDD = VDDQ = 3.3 ± 0.3V, VSS = VSSQ = 0V , unless otherwise noted)
Parameter
Rating
Unit
AC input Levels (VIH /VIL )
Input timing reference level /Output timing reference level
Input rise and fall time
2.0 / 0.8
1.4
1
V
V
ns
50
pF
Output load condition
Output Load Conditions
VDDQ
VDDQ
VOUT
Z = 50
Device
Under
Test
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
Ω
50PF
7
IC42S16400
AC ELECTRICAL CHARACTERISTICS
(At TA = 0 ~ 70°C, VDD = VDDQ = 3.3 ± 0.3V, VSS = VSSQ = 0V , unless otherwise noted)
-6
Symbol
Parameter
tCK3
tCK2
tAC3
tAC2
tCH
tCL
tCKE
tCKH
tAS
tAH
tCMS
tCMH
tDS
tDH
tOH3
tOH2
tLZ
tHZ
tRC
tRAS
tRCD
tRP
tRRD
tDPL
tT
tRSC
tPDE
tSRX
tREF
CLK Cycle Time
CLK to valid output delay(1)
CLK high pulse width
CLK low pulse width
CKE setup time
CKE hold time
Address setup time
Address hold time
Command setup time
Command hold time
Data input setup time
Data input hold time
Output data hold time(1)
CLK to output in low - Z
CLK to output in H - Z
ROW cycle time
ROW active time
RAS to CAS delay
Row precharge time
Row active to active delay
Data in to precharge
Transition time
Mode reg. set cycle
Power down exit setup time
Self refresh exit time
Refresh Time
CAS Latency = 3
CAS Latency = 2
CAS Latency = 3
CAS Latency = 2
CAS Latency = 3
CAS Latency = 2
-7
Min.
Max.
Min.
Max.
Units
6
7.5
—
—
2.5
2.5
1.5
0.8
1.5
0.8
1.5
0.8
1.5
0.8
2.5
2.5
0
2.5
60
42
18
15
12
12
1
10
7.5
7.5
—
—
—
5
6
—
—
—
—
—
—
—
—
—
—
—
—
—
5
—
100,000
—
—
—
—
10
—
—
—
64
7.5
10
—
—
2.5
2.5
1.5
0.8
1.5
0.8
1.5
0.8
1.5
0.8
2.7
3
0
2.7
67.5
45
20
20
15
15
1
10
7.5
7.5
—
—
—
5.4
6
—
—
—
—
—
—
—
—
—
—
—
—
—
5.4
—
100,000
—
—
—
—
10
—
—
—
64
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
Notes:
1. if clock rising time is longer than 1ns, (tr/2-0.5ns) should be added to the parameter.
8
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Basic Features and Function Description
Simplified State Diagram
Self
Refresh
LF
SE
Mode
Register
Set
try
en
LF
SE
MRS
it
ex
AUTO
Refresh
REF
IDLE
E
CK
ACT
CK
E
Power
Down
CKE
ROW
ACTIVE
y
Au Write
to p
rec with
har
ge
re
co
ve
r
e
rit
W
CKE
WRITE
Read (write recovery)
CKE
e re
READ
SUSPEND
Read with
Auto Precharge
)
cov
ery)
CKE
CKE
READA
SUSPEND
n)
(P r
ech
arg
e
READ A
PR
E
tio
ina
Precharge
CKE
CKE
ith e
te w arg
Wri Prech
uto
(writA
m
ter
POWER
ON
READ
ter
min
atio
n
WRITE A
CKE
R
Auto ead w
Pre ith
cha
rge
rge
cha
P re
E(
PR
CKE
Read
Write
Write with
Auto Precharge
WRITE A
SUSPEND
PRE
WRITE
SUSPEND
ad
Re
Write (Write recovery)
h
wit rge
ad cha
Re Pre
to
Au
W
rit
e
T
BS
BS
T
CKE
Active
Power
Down
Precharge
Automatic sequence
Manual input
Note: After the AUTO refresh operation, precharge operation is
performed automatically and enter the IDLE state
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
9
IC42S16400
COMMAND TRUTH TABLE
CKE
n-1
n
Symbol
Command
DESL
NOP
MRS
ACT
READ
READA
WRIT
WRITA
PRE
PALL
BST
REF
SELF
Device deselect
No operation
Mode register set
Bank activate
Read
Read with auto precharge
Write
Write with auto precharge
Precharge select bank
Precharge all banks
Burst stop
CBR (Auto) refresh
Self refresh
Notes:
H : High level
X : High or Low level (Don’t care)
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
H
L
CS
RAS
CAS
WE
BA
H
L
L
L
L
L
L
L
L
L
L
L
L
X
H
L
L
H
H
H
H
L
L
H
L
L
X
H
L
H
L
L
L
L
H
H
H
L
L
X
H
L
H
H
H
L
L
L
L
L
H
H
X
X
L
V
V
V
V
V
V
X
X
X
X
A11
A10 A9-A0
X
X
L
V
L
H
L
H
L
H
X
X
X
X
X
V
V
V
V
V
V
X
X
X
X
X
L : Low level
V : Valid Data input
DQM TRUTH TABLE
CKE
Symbol
Command
ENB
MASK
Data Write / Output Enable
Data Mask / Output Disable
n-1
n
DQM
H
H
X
X
L
H
CKE TRUTH TABLE
10
Symbol
Command
Current State
—
—
—
REF
SELF
—
Clock suspend mode entry
Clock suspend
Clock suspend mode exit
CBR refresh command
Self refresh entry
Self refresh exit
Activating
Any
Clock suspend
Idle
Idle
Self refresh
—
—
Power down entry
Power down exit
Idle
Power down
CKE
n-1
n
H
L
L
H
H
L
L
H
L
L
L
H
H
L
H
H
L
H
CS
RAS
CAS
WE
Addreess
X
X
X
L
L
L
H
X
X
X
X
X
L
L
H
X
X
X
X
X
X
L
L
H
X
X
X
X
X
X
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
OPERATION COMMAND TABLE(1)
Current State Command
Operation
CS
RAS
CAS
WE
Idle
NOP or Power-Down(2)
NOP or Power-Down(2)
Illegal(3)
Illegal(3)
Row Active
NOP
Refresh or Self-Refresh(4)
Mode Register Set
NOP
NOP
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
X
H
H
H
L
L
L
L
X
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
L
L
H
H
L
L
X
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
X
H
L
H
L
H
L
X
H
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
Row Active
Read
Write
Read With
AutoPrecharge
DESL
NOP or BST
READ / READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP or BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
Begin read : Determine AP(5)
Begin write : Determine AP(5)
Illegal(3)
Precharge(6)
Illegal
Illegal
Continue burst to end -> Row active
Continue burst to end -> Row active
Burst stop -> Row active
Term burst, new read : Determine AP(7)
Term burst, start write : Determine AP(7, 8)
Illegal(3)
Term burst, precharging
Illegal
Illegal
Continue burst to end -> write recovering
Continue burst to end -> write recovering
Burst stop -> Row active
Term burst, start read : Determine AP(7, 8)
Term burst, new write : Determine AP(7)
Illegal(3)
Term burst, precharging(9)
Illegal
Illegal
Continue burst to end -> Precharging
Continue burst to end -> Precharging
Illegal
Illegal(11)
Illegal(11)
Illegal(3)
Illegal(11)
Illegal
Illegal
Address
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
11
IC42S16400
OPERATION COMMAND TABLE(continue)
Current State Command
Write with auto
precharge
Precharging
Row activating
Write
recovering
12
DESL
NOP
BST
READ / READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
Operation
CS
Continue burst to end -> write recovering with auto precharge H
Continue burst to end -> write recovering with auto precharge L
Illegal
Illegal(11)
Illegal(11)
Illegal(3, 11)
Illegal(3, 11)
Illegal
Illegal
Nop -> Enter idle after tRP
Nop -> Enter idle after tRP
Nop -> Enter idle after tRP
Illegal(3)
Illegal(3)
Illegal(3)
Nop -> Enter idle after tRP
Illegal
Illegal
Nop - > Enter row active after tRCD
Nop - > Enter row active after tRCD
Nop - > Enter row active after tRCD
Illegal(3)
Illegal(3)
Illegal(3, 9)
Illegal(3)
Illegal
Illegal
Nop -> Enter row active after tDPL
Nop -> Enter row active after tDPL
Nop -> Enter row active after tDPL
Start read, Determine AP(8)
New write, Determine AP
Illegal(3)
Illegal(3)
Illegal
Illegal
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
H
L
L
L
L
L
L
L
L
RAS
CAS
WE
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
H
L
L
H
H
L
L
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
X
H
L
H
L
H
L
H
L
Address
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
OPERATION COMMAND TABLE(continue)
Current State Command
Write
recovering
with auto
precharge
Auto
Refreshing
Mode
register
setting
DESL
NOP
BST
READ/READA
WRIT/WRITA
ACT
PRE/PALL
REF/SELF
MRS
DESL
NOP/BST
READ/WRIT
ACT/PRE/PALL
REF/SELF/MRS
DESL
NOP
BST
READ/WRIT
ACT/PRE/PALL/
REF/SELF/MRS
Operation
Nop -> Enter precharge after tDPL
Nop -> Enter precharge after tDPL
Nop -> Enter precharge after tDPL
Illegal(3 ,8, 11)
Illegal(3,11)
Illegal(3, 11)
Illegal(3, 11)
Illegal
Illegal
Nop Enter idle after tRC
Nop Enter idle after tRC
Illegal
Illegal
Illegal
Nop -> Enter idle after 2 Clocks
Nop -> Enter idle after 2 Clocks
Illegal
Illegal
Illegal
CS
RAS
CAS
WE
H
L
L
L
L
L
L
L
L
H
L
L
L
L
H
L
L
L
L
X
H
H
H
H
L
L
L
L
X
H
H
L
L
X
H
H
H
L
X
H
H
L
L
H
H
L
L
X
H
L
H
L
X
H
H
L
X
X
H
L
H
L
H
L
H
L
X
X
X
X
X
X
H
L
X
X
Address
X
X
X
BA, CA, A10
BA, CA, A10
BR, RA
BA, A10
X
Op-Code
X
X
X
X
X
X
X
X
X
X
Notes:
1. All entries assume that CKE was active (High level) during the preceding clock cycle.
2. If both banks are idle, and CKE is inactive (Low level), the device will enter Power downmode. All input buffers except CKE
will be disabled.
3. Illegal to bank in specified states; Function may be legal in the bank indicated by Bank Address(BA), depending on the
state of that bank.
4. If both banks are idle, and CKE is inactive (Low level), the device will enter Self refresh mode. All input buffers except CKE
will be disabled.
5. Illegal if tRCD is not satisfied.
6. Illegal if tRAS is not satisfied.
7. Must satisfy burst interrupt condition.
8. Must satisfy bus contention, bus turn around, and/or write recovery requirements.
9. Must mask preceding data which don’t satisfy tDPL .
10. Illegal if tRRD is not satisfied.
11. Illegal for single bank, but legal for other banks in multi-bank devices.
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
13
IC42S16400
CKE RELATED COMMAND TRUTH TABLE(1)
CKE
n-1
n
Current State
Operation
Self-Refresh (S.R.)
INVALID, CLK (n - 1)would exit S.R.
Self-Refresh Recovery
Self-Refresh Recovery(2)
Illegal
Illegal
(2)
Maintain S.R.
Self-Refresh Recovery
Idle After tRC
Idle After tRC
Illegal
Illegal
Begin clock suspend next cycle(5)
Begin clock suspend next cycle(5)
Illegal
Illegal
Power-Down (P.D.)
Both Banks Idle
Exit clock suspend next cycle(2)
Maintain clock suspend
INVALID, CLK (n - 1) would exit P.D.
EXIT P.D. -> Idle(2)
Maintain power down mode
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Auto-Refresh
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Refer to operations in Operative Command Table
Self-Refresh(3)
Refer to operations in Operative Command Table
Power-Down(3)
Any state
other than
listed above
Refer to operations in Operative Command Table
Begin clock suspend next cycle(4)
Exit clock suspend next cycle
Maintain clock suspend
H
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
H
L
L
H
H
H
H
H
H
H
H
H
H
L
H
H
L
L
X
H
H
H
H
L
H
H
H
H
L
L
L
L
H
L
X
H
L
H
H
H
H
H
L
L
L
L
L
X
H
L
H
L
CS
RAS
CAS
WE
X
H
L
L
L
X
H
L
L
L
H
L
L
L
X
X
X
X
X
H
L
L
L
L
H
L
L
L
L
X
X
X
X
X
X
X
H
H
L
X
X
H
H
L
X
H
H
L
X
X
X
X
X
X
H
L
L
L
X
H
L
L
L
X
X
X
X
X
X
X
H
L
X
X
X
H
L
X
X
H
L
X
X
X
X
X
X
X
X
H
L
L
X
X
H
L
L
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
X
X
H
L
X
X
X
H
L
X
X
X
X
X
Address
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
X
X
—
—
—
X
Op - Code
—
—
—
X
Op - Code
X
X
X
X
X
Notes:
1. H : Hight level, L : low level, X : High or low level (Don’t care).
2. CKE Low to High transition will re-enable CLK and other inputs asynchronously. A minimum setup time must be satisfied
before any command other than EXIT.
3. Power down and Self refresh can be entered only from the both banks idle state.
4. Must be legal command as defined in Operative Command Table.
5. Illegal if tSREX is not satisfied.
14
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Initiallization
CAS Latency
Before starting normal operation, the following power on
sequence is necessary to prevent SDRAM from damged
or malfunctioning.
CAS latency is the most critical parameter being set. It
tells the device how many clocks must elapse before the
data will be available.
The value is determined by the frequency of the clock and
the speed grade of the device. The value can be programmed as 2 or 3.
1. Apply power and start clock. Attempt to maintain CKE
high , DQN high and NOP condition at the inputs.
2. Maintain stable power, table clock , and NOP input
conditions for a minimum of 200us.
3. Issue precharge commands for all bank. (PRE or
PREA)
4. After all banks become idle state (after tRP), issue 8 or
more auto-refresh commands.
5. Issue a mode register set command to initialize the
mode regiser.
After these sequence, the SDRAM is in idle state and
ready for normal operation.
Programming the Mode Register
The mode register is programmed by the mode register
set command using address bits A13 through A0 as data
inputs. The register retains data until it is reprogrammed
or the device loses power.
The mode register has four fields;
Burst Length
Burst Length is the number of words that will be output or
input in read or write cycle. After a read burst is completed,
the output bus will become high impedance.
The burst length is programmable as 1, 2, 4, 8 or full page.
Wrap Type (Burst Sequence)
The wrap type specifies the order in which the burst data
will be addressed. The order is programmable as either
“Sequential” or “Interleave”. The method chosen will
depend on the type of CPU in the system.
Options : A13 through A7
CAS latency : A6 through A4
Wrap type : A3
Burst length : A2 through A0
Following mode register programming, no command can
be asserted befor at least two clock cycles have elapsed.
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
15
IC42S16400
MODE REGISTER
6
13 12 11
0 0 0
10
0
9
0
8
0
1
13 12 11
x x x
10
x
9
1
8
0
7
0
6
13 12
0 0
10
0
9
0
8
0
7
0
6
11
0
7
5
4
3
2
1
0
JEDEC Standard Test Set
5
4
LTMODE
3
WT
2
5
4
LTMODE
3
WT
2
1
BL
0
1
BL
0
Burst Read and Single Write (for Write Through Cache)
Burst Read and Burst Write
X = Don’t care
Bits2 - 0 WT = 0 WT = 1
1
1
000
Burst length
001
2
2
010
4
4
011
8
8
100
R
R
101
R
R
110
R
R
111
Fullpage
R
0
Wrap type
1
Sequential
Interleave
Bits 6-4
Latency
mode
000
CAS Iatency
R
001
R
010
2
011
3
100
R
101
R
110
R
111
R
Remark R : Reserved
16
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Burst Length and Sequence
Burst of Two
Starting Address
(column address A0, binary)
0
1
Sequential Addressing
Sequence (decimal)
0, 1
1, 0
Interleave Addressing Sequence
(decimal)
0, 1
1, 0
Sequential Addressing
Sequence (decimal)
0, 1, 2, 3
1, 2, 3, 0
2, 3, 0, 1
3, 0, 1, 2
Interleave Addressing Sequence
(decimal)
0, 1, 2, 3
1, 0, 3, 2
2, 3, 0, 1
3, 2, 1, 0
Sequential Addressing
Sequence (decimal)
0, 1, 2, 3, 4, 5, 6, 7
1, 2, 3, 4, 5, 6, 7, 0
2, 3, 4, 5, 6, 7, 0, 1
3, 4, 5, 6, 7, 0, 1 ,2
4, 5, 6, 7, 0, 1, 2, 3
5, 6 ,7, 0, 1, 2, 3, 4
6, 7 ,0 ,1 ,2 ,3 ,4 ,5
7, 0, 1, 2, 3, 4, 5, 6
Interleave Addressing Sequence
(decimal)
0, 1, 2, 3, 4, 5, 6, 7
1, 0, 3, 2, 5, 4, 7, 6
2, 3, 0, 1, 6, 7, 4, 5
3, 2, 1, 0, 7, 6, 5, 4
4, 5, 6, 7, 0, 1, 2, 3
5, 4, 7, 6, 1, 0, 3, 2
6, 7, 4, 5, 2, 3, 0, 1
7, 6, 5, 4, 3, 2, 1, 0
Burst of Four
Starting Address
(column address A1 - A0, binary)
00
01
10
11
Burst of Eight
Starting Address
(column address A2 - A0, binary)
000
001
010
011
100
101
110
111
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
17
IC42S16400
Address Bits of Bank-Select and Precharge
Row A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13
(Activate command)
Row A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13
(Precharge command)
A12
A13
0
0
Select Bank A
“Activate “ command
0
1
Select Bank B
“Activate” command
1
0
Select Bank C
“Activate” command
1
1
Select Bank D
“Activate” command
A10
Result
A12 A13 Result
0
0
0
Precharge Bank A
0
0
1
Precharge Bank B
0
1
0
Precharge Bank C
0
1
1
Precharge Bank D
1
X
X
Precharge All Banks
X: Don't care
0
Disable Auto-Precharge (End of Burst)
1
Enable Auto - Precharge (End of Burst)
Co1. A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13
(CAS strobes)
18
A12
A13
0
0
Enable Read/Write
commands for Bank A
Result
0
1
Enable Read/Write
commands for Bank B
1
0
Enable Read/Write
commands for Bank C
1
1
Enable Read/Write
commands for Bank D
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Precharge
The precharge command can be asserted anytime after tRAS(min.) is satisfied.
Soon after the precharge command is asserted, the precharge operation is performed and the synchronous DRAM enters
the idle state after tRP(min.) is satisfied. The parameter tRP is the time required to perform the precharge.
The earliest timing in a read cycle that a precharge command can be asserted without losing any data in the burst is as
follows.
PrechargeE
T0
T1
T3
T2
T4
Burst lengh=4
T7
T6
T5
CLK
Command
Read
PRE
CAS latency = 2
DQ
Command
Q0
Q1
Read
Q2
Hi - Z
Q3
PRE
CAS latency = 3
DQ
Q0
Q1
Q2
Q3
Hi - Z
(tRAS is satisfied)
In order to write all data to the memory cell correctly, the asynchronous parameter tDPL must be satisfied. The tDPL(min.)
specification defines the earliest time that a precharge command can be asserted. The minimum number of clocks can be
calculated by dividing tDPL(min.) with the clock cycle time.
In summary, the precharge command can be asserted relative to the reference clock that indicates the last data word is
valid. In the following table, minus means clocks before the reference; plus means time after the reference.
CAS latency
2
3
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
Read
-1
-2
Write
+ tDPL((min.)
+ tDPL((min.)
19
IC42S16400
Auto Precharge
During a read or write command cycle, A10 controls whether auto precharge is selected. If A10 is high in the read or write
command (Read with Auto precharge command or Write with Auto precharge command), auto precharge is selected and
begins automatically.
In the write cycle, tDAL(min.) must be satisfied before asserting the next activate command to the bank being precharged.
When using auto precharge in the read cycle, knowing when the precharge starts is important because the next activate
command to the bank being precharged cannot be executed until the precharge cycle ends. Once auto precharge has
started, an activate command to the bank can be asserted after tRP has been satisfied.
A Read or Write command without auto - precharge can be terminated in the midst of a burst operation. However, a Read
or Write command with auto - precharge can not be interrupted by the same bank commands before the entire burst operation is completed. Therefore use of the same bank Read, Write, Precharge or Burst Stop command is prohibited during a
read or write cycle with auto - precharge. It should be noted that the device will not respond to the Auto - Precharge command if the device is programmed for full page burst read or write cycles.
The timing when the auto precharge cycle begins depends both on both the CAS Iatency programmed into the mode register and whether the cycle is read or write.
Read with Auto Precharge
During a READA cycle, the auto precharge begins one clock earlier (CL = 2) or two clocks earlier (CL = 3) than the last word
output.
READ with AUTO PRECHARGE
Burst lengh = 4
T0
T1
T4
T3
T2
T6
T5
T7
T8
CLK
No New Command to Bank B
Command
Auto precharge starts
READA B
CAS latency = 2
DQ
QB0
QB1
QB2
Hi - Z
QB3
No New Command to Bank B
Auto precharge starts
Command
READA B
CAS latency = 3
DQ
QB0
QB1
QB2
QB3
Hi - Z
Remark READA means READ with AUTO PRECHARGE
20
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Write with Auto Precharge
During a write cycle, the auto precharge starts at the timing that is equal to the value of tDPL(min.) after the last data word
input to the device.
WRITE with AUTO PRECHRGE
Burst lengh = 4
T0
T1
T3
T2
T4
T5
T6
T7
T8
CLK
Command
AUTO PRECHARGE starts
WRITA B
tDPL
CAS latency = 2
DQ
DB0
DB1
DB2
DB3
Hi - Z_
AUTO PRECHARGE starts
Command
WRITA B
tDPL
CAS latency = 3
DQ
DB0
DB1
DB2
DB3
Hi - Z
Remark WRITA means WRITE with AUTO Precharge
In summary, the auto precharge cycle begins relative to a reference clock that indicates the last data word is valid. In the
table below, minus means clocks before the reference; plus means clocks after the reference.
CAS latency
2
3
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
Read
-1
-2
Write
+ tDPL((min.)
+ tDPL((min.)
21
IC42S16400
Read / Write Command Interval
Read to Read Command Interval
During a read cycle when a new read command is asserted, it will be effective after the CAS latency, even if the previous
read operation has not completed. READ will be interrupted by another READ.
Each read command can be asserted in every clock without any restriction.
READ to READ Command Interval
Burst lengh=4, CAS latency=2
T0
T1
T3
T2
T4
T6
T5
T7
T8
CLK
Read B
Read A
Command
DQ
QA0
QB0
QB1
QB2
Hi-Z_
QB3
1 cycle
Write to Write Command Interval
During a write cycle, when a new Write command is asserted, the previous burst will terminate and the new burst will begin
with a new write command. WRITE will be interrupted by another WRITE.
Each write command can be asserted in every clock without any restriction.
WRITE to WRITE Command Interval
Burst lengh=4, CAS latency=2
T0
T1
T3
T2
T4
T5
T6
T7
T8
CLK
Command
Write A
Write B
DQ
QA0
QB0
QB1
QB2
QB3
Hi-Z_
1 cycle
22
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Write to Read Command Interval
The write command to read command interval is also a minimum of 1 cycle. Only the write data before the read command
will be written. The data bus must be Hi-Z at least one cycle prior to the first DOUT.
WRITE to READ Command Interval
Burst lengh=4
T0
T1
T2
T3
T4
T6
T5
T7
T8
CLK
1 cycle
Command
WRITE A
Read B
CAS latency=2
DQ
Command
Hi-Z
DA0
Write A
QB0
QB1
QB2
QB3
QB1
QB2
Read B
CAS latency=3
DQ
DA0
Hi-Z
QB0
QB3
Read to Write Command Interval
During a read cycle, READ can be interrupted by WRITE.
DQM must be in High at least 3 clocks prior to the write command. There is a restriction to avoid a data conflict. The data
bus must be Hi-Z using DQM before Write.
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
23
IC42S16400
READ to WRITE Command Interval
T0
T1
T3
T2
T4
T6
T5
T7
CAS latency=2
T8
CLK
Read
Command
Write
DQM
DQ
Hi-Z
D0
D1
D2
D3
1 cycle
T0
T1
T3
T2
T4
T6
T5
T7
Burst length=8, CAS latency=2
T8
T9
CLK
Command
Write
Read
DQM
Q2
Q1
Q0
DQ
D0
D2
D1
Hi-Z is
necessary
example: Burst length=4, CAS latency=3
T0
T1
T2
T3
T4
T6
T5
T8
T7
CLK
Command
Read
Write
DQM
DQ
Q2
Hi-Z is
D0
D1
D2
necessary
24
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
BURST Termination
There are two methods to terminate a burst operation other than using a read or a write command. One is the burst stop
command and the other is the precharge command.
BURST Stop Command
During a read burst, when the burst stop command is issued, the burst read data are terminated and the data bus goes to
high-impedance after the CAS latency from the burst stop command.
During a write burst, when the burst stop command is issued, the burst write data are termained and data bus goes to HiZ at the same clock with the burst stop command.
Burst Termination
T0
T1
T3
T2
T4
Burst lengh=X, CAS Intency=2,3
T7
T6
T5
CLK
BST
Read
Command
CAS latency=2
DQ
Q0
CAS latency=3
Hi-Z
Q1
Q2
Q0
Q1
Hi-Z
Q2
DQ
Remark BST: Burst stop command
T0
T1
T3
T2
T4
T5
Burst lengh=X, CAS latency=2,3
T7
T6
CLK
Command
BST
Write
CAS latency=2,3
Q0
Q0
Q1
Q2
Hi-Z_
DQ
Remark BST: Burst command
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
25
IC42S16400
PRECHARGE TERMINATION
PRECHARGE TERMINATION in READ Cycle
During READ cycle, the burst read operation is terminated by a precharge command.
When the precharge command is issued, the burst read operation is terminated and precharge starts.
The same bank can be activated again after tRP from the precharge command.
When CAS latency is 2, the read data will remain valid until one clock after the precharge command.
When CAS latency is 3, the read data will remain valid until two clocks after the precharge command.
Precharge Termination in READ Cycle
T0
T1
T3
T2
T4
T6
T5
T7
Burst lengh= X
T8
CLK
Command
Read
PRE
ACT
tRP
CAS latency=2
DQ
command
Q0
Q1
Read
Q2
ACT
PRE
tRP
CAS latency=3
DQ
26
Hi-Z
Q3
Q0
Q1
Q2
Q3
Hi-Z
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Precharge Termination in WRITE Cycle
During WRITE cycle, the burst write operation is terminated by a precharge command.
When the precharge command is issued, the burst write operation is terminated and precharge starts.
The same bank can be activated again after tRP from the precharge command. The DQM must be high to mask
invalid data in.
During WRITE cycle, the write data written prior to the precharge command will be correctly stored. However, invalid
data may be written at the same clock as the precharge command. To prevent this from happening, DQM must be high
at the same clock as the precharge command. This will mask the invalid data.
PRECHARGE TERMINATION in WRITE Cycle
T0
T1
T3
T2
T4
T6
T5
T7
Burst lengh = X
T8
CLK
Command
Write
PRE
ACT
CAS latency = 2
DQM
DQ
D0
D1
D2
D3
Hi - Z
D4
tRP
command
Write
PRE
ACT
CAS latency = 3
DQM
DQ
D0
D1
D2
D3
D4
Hi - Z
tRP
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
27
IC42S16400
Mode Register Set
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
CLK
CKE
t
RSC
CS
RAS
CAS
WE
BS0,1
A10
Address Key
ADD
DQM
t
RP
DQ
Hi-Z
Precharge
Command
All Banks
28
Mode Register
Set Command
Command
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
AC Parameters for Write Timing (1 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5
T6 T7 T8
T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CH
CKE
t
CL
t
CK2
t
CMS
t
CKS
Begin Auto Precharge Begin Auto Precharge
Bank A
Bank B
t
CKH
t
CMH
CS
RAS
CAS
WE
*BS0
A10
tAH
tAS
ADD
DQM
tRCD
DQ
tDAL
t
RRD
tRC
tDS
t
DH
t
DPL
t
RP
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3
Activate
Write with Activate
Write with
Activate
Command Auto Precharge Command Auto Precharge Command
Bank A
Command
Bank A
Command
Bank B
Bank B
Bank A
Write without
Auto Precharge
Command
Bank A
Precharge
Command
Bank A
Activate
Command
Bank A
Activate
Command
Bank B
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
29
IC42S16400
AC Parameters for Write Timing (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23
CLK
t
CL
t
CH
CKE
t
CK3
t
CMS
t
CKS
Begin Auto Precharge Begin Auto Precharge
Bank A
Bank B
t
CKH
t
CMH
CS
RAS
CAS
WE
*BS0
A10
tAS
tAH
ADD
DQM
tRCD
DQ
t
DAL
t
RRD
tDS
RC
t
DH
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3
Activate
Command
Bank A
Write with Activate
Write with
Auto Precharge Command Auto Precharge
Command
Bank B
Command
Bank A
Bank B
Activate
Command
Bank A
t
DPL
t
RP
QAb0 QAb1 QAb2 QAb3
Write without
Auto Precharge
Command
Bank A
Precharge
Command
Bank A
Activate
Command
Bank A
BS1=”L”, Bank C,D = Idle
30
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
AC Parameters for Read Timing (1 of 2)
Burst Length=2, CAS Latency=2
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
T13
CLK
tCH tCL
tCK2
Begin Auto
Precharge
Bank B
tCMS
t
CMH
CKE
tCKS
t
CKH
CS
RAS
CAS
WE
*BS0
A10
tAS
tAH
ADD
tRRD
tRAS
tRC
DQM
t
AC2
tLZ
t
RCD
DQ
Hi-Z
tAC2
tOH
QAa0
Activate
Command
Bank A
Read
Command
Bank A
Activate
Command
Bank B
tHZ
tOH
QAa1
Read with
Auto Precharge
Command
Bank B
tRP
tHZ
QBa0
Precharge
Command
Bank A
QBa1
Activate
Command
Bank A
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
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IC42S16400
AC Parameters for Read Timing (2 of 2)
Burst Length=2, CAS Latency=3
T0
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10 T11
T12
T13 T14
T15
CLK
t
CH tCL
CKE
tCKS
t
CK3
Begin Auto
Precharge
Bank B
t
CMS
t
CMH
t
CKH
CS
RAS
CAS
WE
*BS0
A10
t
AH
t
AS
ADD
t
RRD
t
RAS
t
RP
t
RC
DQM
tAC3
tLZ
t
RCD
DQ
tAC3
tOH
tHZ
tOH
Hi-Z
QAa0
Activate
Command
Bank A
Read
Command
Bank A
Activate
Command
Bank B
QAa1
Read with
Auto Precharge
Command
Bank B
t
QBa0
Precharge
Command
Bank A
HZ
QBa1
Activate
Command
Bank A
BS1=”L”, Bank C,D = Idle
32
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Power on Sequence and Auto Refresh (CBR)
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
High level
is required
CKE
t
RSC
Minimum of 8 Refresh Cycles are required
CS
RAS
CAS
WE
BS0, 1
A10
Address Key
ADD
DQM
High Level is Necessary
t
DQ
t
RC
RP
Hi-Z
Precharge
Inputs Command
All Banks
must
be stable
for 200us
1st Auto
Refresh
Command
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
2nd Auto
Refresh
Command
Mode Register
Set Command
Command
33
IC42S16400
Clock Suspension During Burst Read (Using CKE) (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
DQM
t
DQ
HZ
Hi-Z
QAa0
Activate
Command
Bank A
Read
Command
Bank A
QAa1
Clock
Suspended
1 Cycle
QAa2
Clock
Suspended
2 Cycles
QAa3
Clock
Suspended
3 Cycles
BS1=”L”, Bank C,D = Idle
34
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Clock Suspension During Burst Read (Using CKE) (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
DQM
t
HZ
DQ
Hi-Z
QAa0
Activate
Command
Bank A
Read
Command
Bank A
QAa1
Clock
Suspended
1 Cycle
QAa2
Clock
Suspended
2 Cycles
QAa3
Clock
Suspended
3 Cycles
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
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IC42S16400
Clock Suspension During Burst Write (Using CKE) (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
DQM
DQ
Hi-Z
DAa0
Activate
Command
Bank A
DAa1
Clock
Suspended
1 Cycle
Write
Command
Bank A
DAa2
Clock
Suspended
2 Cycles
DAa3
Clock
Suspended
3 Cycles
BS1=”L”, Bank C,D = Idle
36
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Clock Suspension During Burst Write (Using CKE) (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6
T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
DQM
DQ
Hi-Z
DAa0
Activate
Command
Bank A
DAa1
Clock
Suspended
1 Cycle
Write
Command
Bank A
DAa2
Clock
Suspended
2 Cycles
DAa3
Clock
Suspended
3 Cycles
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
37
IC42S16400
Power Down Mode and Clock Mask
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
t
t
t
CKS
CKH
CKS
CKE
VALID
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
DQM
DQ
Hi-Z
QAa0 QAa1
Activate
Command
Bank A
ACTIVE
STANDBY
Power Down
Mode Entry
QAa2
Precharge
Standby
Precharge
Command
Read
Command
Bank A
Power Down
Mode Exit
QAa3
Clock Mask
Start
Clock Mask
End
Power Down
Mode Entry
Power
Down
Mode
Exit
Command
BS1=”L”, Bank C,D = Idle
38
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Auto Refresh (CBR)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0, 1
A10
RAa
ADD
RAa
CAa
DQM
t
DQ
RP
t
RC
t
RC
Hi-Z
Q0
Precharge CBR Refresh
Command
Command
All Banks
CBR Refresh
Command
Q1
Q2
Q3
Activate
Read
Command Command
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
39
IC42S16400
Self Refresh (Entry and Exit)
CLK can be Stopped**
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
SRX
t
SRX
t
CKS
t
CKS
CKE
CS
RAS
CAS
WE
*BS0
A10
ADD
t
RC
DQM
DQ
t
RC
Hi-Z
All Banks
must be idle
Self refresh
Entry
Self Refresh
Exit
Self Refresh
Entry
Self Refresh
Exit
Activate
Command
BS1=”L”, Bank C,D = Idle
Clock can be stopped at CKE=Low. If clock is stopped, it must be restarted/stable for 4 clock cycles before CKE=High
40
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Random Column Read (Page With Same Bank) (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
RAa
RAd
CAa
CAb
CAc
RAd
CAd
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3 QAb0 QAb1 QAc0 QAc1 QAc2 QAc3
Precharge
Command
Bank A
Read
Command
Bank A
Read
Read
Command Command
Bank A
Bank A
QAd0 QAd1 QAd2 QAd3
Precharge Activate
Read
Command Command Command
Bank A
Bank A
Bank A
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
41
IC42S16400
Random Column Read (Page With Same Bank) (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
RAd
CAa
CAb
CAc
RAd
CAd
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3 QAb0 QAb1 QAc0 QAc1 QAc2 QAc3
Activate
Command
Bank A
Read
Command
Bank A
Read
Read
Command Command
Bank A
Bank A
Precharge
Command
Bank A
Activate
Command
Bank A
Read
Command
Bank A
BS1=”L”, Bank C,D = Idle
42
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Random Column Write (Page With Same Bank) (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Rd
Cb
Ca
Cc
Rd
Cd
DQM
DQ
Hi-Z
Da0
Activate
Command
Bank B
Da1
Write
Command
Bank B
Da2
Da3
Db0
Db1
Dc0
Dc1
Write
Write
Command Command
Bank B
Bank B
Dc2
Dc3
Dd0
Dd1
Dd2
Dd3
Precharge Activate
Write
Command Command Command
Bank B
Bank B
Bank B
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
43
IC42S16400
Random Column Write (Page With Same Bank) (1 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK
CKE
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Rd
Cb
Ca
Cc
Rd
Cd
DQM
DQ
Hi-Z
Da0
Activate
Command
Bank B
Da1
Write
Command
Bank B
Da2
Da3
Db0
Db1
Write
Command
Bank B
Dc0
Dc1
Write
Command
Bank B
Dc2
Dc3
Dd0
Precharge
Command
Bank B
Activate
Command
Bank B
Dd1
Write
Command
Bank B
BS1=”L”, Bank C,D = Idle
44
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Random Row Read (Interleaving Banks) (1 of 2)
Burst Length=8, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
High
CS
RAS
CAS
WE
*BS0
A10
ADD
t
DQM
DQ
RCD
Hi-Z
Activate
Command
Bank B
t
AC2
t
RP
QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBa7 QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7
Read
Command
Bank B
Activate
Command
Bank A
Precharge Active
Command Command
Bank B
Bank B
QBb0 QBb1
Read
Command
Bank B
Read
Command
Bank A
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
45
IC42S16400
Random Row Read (Interleaving Banks) (2 of 2)
Burs tLength=8, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
High
CS
RAS
CAS
WE
*BS0
A10
ADD
t
DQM
DQ
t
RCD
t
AC3
RP
Hi-Z
QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBa7 QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7 QBb0
Activate
Command
Bank B
Read
Command
Bank B
Activate
Command
Bank A
Read
Command
Bank A
Precharge
Command
Bank B
Activate
Command
Bank B
Read
Precharge
Command Command
Bank B
Bank A
BS1=”L”, Bank C,D = Idle
46
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Random Row Write (Interleaving Banks) (1 of 2)
Burst Length=8, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
High
CS
RAS
CAS
WE
*BS0
A10
ADD
t
RCD
DQM
DQ
Hi-Z
Activate
Command
Bank A
t
DPL
t
RP
QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7 QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBa7 QAb0 QAb1 QAb2 QAb3 QAb4
Write
Command
Bank A
Activate
Command
Bank B
Precharge Active
Command Command
Bank A
Bank A
Write
Command
Bank B
Write
Command
Bank A
Precharge
Command
Bank B
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
47
IC42S16400
Random Row Write (Interleaving Banks) (2 of 2)
Burst Length=8, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK
CKE
High
CS
RAS
CAS
WE
*BS0
A10
ADD
RBa
t
DPL
DQM
DQ
Hi-Z
Activate
Command
Bank A
t
DPL
t
RP
QAa0 QAa1 QAa2 QAa3 QAa4 QAa5 QAa6 QAa7 QBa0 QBa1 QBa2 QBa3 QBa4 QBa5 QBa6 QBb7 QAb0 QAb1 QAb2 QAb3
Write
Command
Bank A
Activate
Command
Bank B
Write
Command
Bank B
Precharge
Command
Bank A
Activate
Command
Bank A
Precharge
Write
Command Command
Bank B
Bank A
BS1=”L”, Bank C,D = Idle
48
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Read and Write Cycle (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAb
CAa
CAc
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3
Activate
Command
Bank A
Write
Command
Bank A
DAb0 DAb1
DAb3
The Write Data
Write
Command is Masked with a
Bank A
Zero Clock
latency
QAc0 QAc1
Read
Command
Bank A
QAc3
The Read Data
is Masked with
Two Clocks
Latency
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
49
IC42S16400
Read and Write Cycle (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
CAb
CAc
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3
Activate
Command
Bank A
Read
Command
Bank A
DAb0 DAb1
QAc0 QAc1
DAb3
Write
The Write Data Read
Command is Masked with a Command
Bank A
Bank A
Zero Clock
Latency
QAc3
The Read Data
is Masked with
Two Clock
Latency
BS1=”L”, Bank C,D = Idle
50
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Interleaved Column Read Cycle (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Cb
t
DQM
DQ
Ra
RCD
Ra
Ca
Cb
Cc
Cb
Cd
t
AC2
Hi-Z
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBb0 QBb1 QBc0 QBc1 QAb0 QAb1 QBd0 QBd1 QBd2 QBd3
Activate
Command
Bank A
Read
Read
Read
Activate
Read
Read
Read
Command Command Command Command Command Command Command
Bank A
Bank A
Bank B
Bank B
Bank B
Bank B
Bank B
Precharge
Command
Bank B
Precharge
Command
Bank A
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
51
IC42S16400
Interleaved Column Read Cycle (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Ra
Ca
Ca
Ra
Cb
Cc
Cb
DQM
t
RCD
t
RRD
DQ
t
AC3
Hi-Z
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBb0 QBb1 QBc0 QBc1 QAb0 QAb1 QAb2 QAb3
Activate
Command
Bank A
Read
Command
Bank A
Read
Read
Read
Read
Precharge Precharge
Command Command Command Command Command Command
Bank A
Bank B
Bank B Bank B
Bank B
Bank A
Activate
Command
Bank B
BS1=”L”, Bank C,D = Idle
52
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Interleaved Column Write Cycle (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Ra
Ca
Ca
Cb
Cc
Cb
t
RCD
DQM
t
DQ
Ra
Cb
t
RP
t
DPL
RRD
Hi-Z
DAa0 DAa1 DAa2 DAa3 DBa0 DBa1 DBb0 DBb1 DBc0 DBc1 DAb0 DAb1 DBd0 DBd1 DBd2 DBd3
Activate
Write
Write
Write
Write
Write
Activate
Command Command Command Command Command Command Command
Bank
B
Bank
B
Bank A
Bank A
Bank B
Bank B
Bank A
Precharge
Command
Bank A
Write
Command
Bank B
Precharge
Command
Bank B
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
53
IC42S16400
Interleaved Column Write Cycle (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Ra
Ca
t
RCD
DQM
t
DQ
Ra
Ca
Cb
Cc
Cb
Cd
t
DPL
t
DPL
t
RP
RRD
Hi-Z
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBb0 QBb1 QBc0 QBc1 QAb0 QAb1 QBd0 QBd1 QBd2 QBd3
Activate
Command
Bank A
Write
Command
Bank A
Activate
Command
Bank B
Write
Write
Write
Write
Write
Command Command Command Command Command
Bank A
Bank B
Bank B Bank B
Bank B
Precharge
Command
Bank B
Precharge
Command
Bank A
BS1=”L”, Bank C,D = Idle
54
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Auto Precharge after Read Burst (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CKE
CK2
High
Start Auto Precharge
Bank B
Start Auto Precharge
Bank A
Start Auto Precharge
Bank B
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Ra
Ca
Ra
Rb
Ca
Cb
Rb
Rc
Cb
Rc
Cc
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 QBb0 QBb1 QBb2 QBb3 QAc0 QAc1 QAc2
Activate
Read
Activate
Read with
Command Command Command Auto Precharge
Bank A
Bank A
Bank B Command
Bank B
Read with
Auto Precharge
Command
Bank A
Activate
Command
Read with
Bank A
Auto Precharge
Command
Read with
Activate
Bank B
Auto Precharge
Command
Command
Bank B
Bank A
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
55
IC42S16400
Auto Precharge after Read Burst (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CKE
CK3
High
Start Auto Precharge
Bank B
Start Auto
Precharge
Bank A
Start Auto Precharge
Bank B
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Ra
Ca
Ra
Rb
Ca
Cb
Rb
RBb
Cb
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3
Activate
Command
Bank A
Activate
Command
Bank B
Read with
Auto Precharge
Command
Bank B
Read with
Auto Precharge
Command
Bank A
Activate
Command
Bank B
QBb0 QBb1 QBb2
Write with
Auto precharge
Command
Bank B
Read
Command
Bank A
BS1=”L”, Bank C,D = Idle
56
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Auto Precharge after Write Burst (1 of 2)
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CKE
CK2
High
Start Auto Precharge
Bank B
Start Auto Precharge
Bank B
Start Auto Precharge
Bank A
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Ra
Ca
Ra
Rb
Ca
Cb
Rb
Rc
Cb
Rc
Cc
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3 QBb0 QBb1 QBb2 QBb3 QAc0 QAc1 QAc2 QAc3
Activate
Write
Write with
Activate
Command Command Command Auto Precharge
Command
Bank A
Bank B
Bank A
Bank B
Activate
Write with
Activate
Command
Auto Precharge Command
Bank A
Command
Bank B
Write with
Bank A
Auto Precharge
Write with
Bank A
Auto Precharge
Command
Bank B
Start Auto
Precharge
Bank A
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
57
IC42S16400
Auto Precharge after Write Burst (2 of 2)
Burst Length=4, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
High
Start Auto
Precharge
Bank A
Start Auto Precharge
Bank B
Start Auto Precharge
Bank B
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Ra
Ca
Ra
Rb
Ca
Cb
Rb
RBb
Cb
DQM
DQ
Hi-Z
QAa0 QAa1 QAa2 QAa3 QBa0 QBa1 QBa2 QBa3 QAb0 QAb1 QAb2 QAb3
Activate
Command
Bank A
Activate
Command
Bank B
Read with
Auto Precharge
Command
Bank B
Read with
Auto Precharge
Command
Bank A
Activate
Command
Bank B
QBb0 QBb1 QBb2 QBb3
Write with
Auto precharge
Command
Bank B
Read
Command
Bank A
BS1=”L”, Bank C,D = Idle
58
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Full Page Read Cycle (1 of 2)
Burst Length=Full Page, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
High
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Rb
Ra
Ca
Ca
Ra
Rb
t
RP
DQM
DQ
Hi-Z
QAa
Activate
Command
Bank A
Read
Command
Bank A
QAa+1 QAa+2 QAa-2 QAa-1
Activate
Command
Bank B
QAa
QAa+1 QBa
Read
Command
Bank B
The burst counter wraps
from the highest order
page address back to zero
during this time interval
QBa+1 QBa+2 QBa+3 QBa+4 QBa+51QBa+6
Full page burst operation does not
terminate when the burst length is
satisfied; the burst counter
increments and continues bursting
beginning with the starting address
Precharge
Command
Bank B
Activate
Command
Bank B
Burst Stop
Command
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
59
IC42S16400
Full Page Read Cycle (2 of 2)
Burst Length=Full Page, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
High
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Rb
Ra
Ca
Ca
Ra
Rb
DQM
DQ
Hi-Z
QAa
Activate
Command
Bank A
Read
Command
Bank A
Activate
Command
Bank B
QAa+1 QAa+2 QAa-2 QAa-1
QAa
Read
Command
Bank B
The burst counter wraps
from the highest order
page address back to zero
during this time interval
QAa+1 QBa0
QBa+1 QBa+2 QBa+3 QBa+4 QBa+5
Full page burst operation
does not teminate when
Precharge
the burst length is satisfied;
Command
the burst counter increments
Bank B
and continues bursting
beginning with the starting
Burst Stop
address
Command
Activate
Command
Bank B
BS1=”L”, Bank C,D = Idle
60
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Full Page Write Cycle (1 of 2)
Burst Length=Full Page, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
High
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Rb
Ra
Ca
Rb
Ca
Ra
DQM
t
DQ
BDL
Hi-Z
QAa
Activate
Command
Bank A
QAa+1 QAa+2 QAa+3 QAa-1
Write
Command
Bank A
QAa
QAa+1
Activate
Command
Bank B
The burst counter wraps
from the highest order
page address back to zero
during this time interval
QBa
QBa+1 QBa+2 QBa+3 QBa+4 QBa+5 QBa+6
Write
Command
Bank B
Data is ignored
Precharge
Command
Bank B
Full page burst operation
does not terminate when
the burst length is satisfied;
the burst counter increments
and continues bursting
beginning with the starting
address
Activate
Command
Bank B
Burst Stop
Command
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
61
IC42S16400
Full Page Write Cycle (2 of 2)
Burst Length=Full Page, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
High
CS
RAS
CAS
WE
*BS0
A10
Ra
ADD
Ra
Rb
Ra
Ca
Rb
Ca
Ra
DQM
tBDL
DQ
Data is ignored.
Hi-Z
DAa
Activate
Command
Bank A
DAa+1 DAa+2 DAa+3 DAa-1
Write
Command
Bank A
DAa
DAa+1
Activate
Command
Bank B
The burst counter wraps
from the highest order
page address back to zero
during this time interval
DBa
DBa+1 DBa+2 DBa+3 DBa+4 DBa+5
Write
Command
Bank B
Full page burst operation
does not terminate when
the burst length is satisfied;
the burst counter increments
and continues bursting
beginning with the starting
address
Precharge
Command
Bank B
Activate
Command
Bank B
Burst Stop
Command
BS1=”L”, Bank C,D = Idle
62
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Burst Read and Single Write Operation
Burst Length=4, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
CLK
CKE
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
t
CK2
High
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
CAb
CAc
CAd
CAe
DQM
Hi-Z
DQ
Activate
Command
Bank A
Read
Command
Bank A
Read
Single Write Single Write
Command
Command
Command
Bank
A
Bank A
Bank A
DQs are
masked
Single Write
Command
Bank A
DQs are
masked
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
63
IC42S16400
Full Page Random Column Read
Burst Length=Full Page, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
BS
A10
Ra
Ra
ADD
Ra
Ra
Rb
Ca
Ca
Cb
Cc
Cb
Cc
Rb
t
RP
DQM
DQ
Hi-Z
QAa0 QBa0
Activate
Command
Bank A
Activate
Command
Bank B
Read
Command
Bank B
Read
Command
Bank A
Read
Command
Bank A
QAb0
QAb1
Read
Command
Bank B
QBb0
QBb1
Read
Command
Bank A
QAc0
QAc1
QAc2
Read
Command
Bank B
QBc0
QBc1
QBc2
Precharge
Command Bank B (Bank D)
(Precharge Termination)
Activate
Command
Bank B
BS1=”L”, Bank C,D = Idle
64
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Full Page Random Column Write
Burst Length=Full Page, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
CS
RAS
CAS
WE
*BS0
A10
Ra
Ra
ADD
Ra
Ra
Rb
Ca
Ca
Cb
Cc
Cb
Cc
Rb
t
RP
DQM
DQ
Hi-Z
QAa0
Activate
Command
Bank A
Activate
Command
Bank B
QBa0
QAb0
QAb1
Write
Command
Bank B
Write
Command
Bank A
Write
Command
Bank A
QBb0
QBb1
Write
Command
Bank B
QAc0
QAc1
Write
Command
Bank A
QAc2
QBc0
QBc1
Write
Command
Bank B
QBc2
Precharge
Command Bank B (Bank D)
(Precharge Termination)
Write Data
is masked
Activate
Command
Bank B
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
65
IC42S16400
Precharge Termination of a Burst (1 of 2)
Burst Length=8, CAS Latency=2
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK2
CKE
High
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
RAc
RAb
CAa
RAb
t
DPL
t
CAb
RAc
t
RP
CAc
t
RP
RP
DQM
DQ
Hi-Z
QAa0
Activate
Command
Bank A
QAa1
Write
Command
Bank A
QAa2
QAb0
Da3
Precharge
Command
Bank A
Precharge Termination
of a Write Burst. Write
data is masked.
Activate
Command
Bank A
Read
Command
Bank A
QAb1
QAb2
Precharge
Command
Bank A
Activate
Command
Bank A
QAc0
Read
Command
Bank A
QAc1
QAc2
Precharge
Command
Bank A
Precharge Termination
of a Read Burst.
BS1=”L”, Bank C,D = Idle
66
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
IC42S16400
Precharge Termination of a Burst (2 of 2)
Burst Length=8, CAS Latency=3
T0 T1 T2 T3 T4 T5 T6 T7
T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22
CLK
t
CK3
CKE
High
CS
RAS
CAS
WE
*BS0
A10
RAa
ADD
RAa
CAa
RAb
t DPL
t
DQM
DQ
RAc
RAb
t
CAb
t
RP
RAc
t
RAS
RP
RCD
Hi-Z
DAa0
Activate
Command
Bank A
QAb0
DAa1
Write
Command
Bank A
Precharge
Command
Bank A
Write Data
is masked
Activate
Command
Bank A
Precharge Termination
of a Write Burst.
Read
Command
Bank A
QAb1
QAb2
Activate
Command
Bank A
QAb3
Activate
Command
Bank A
Precharge Termination
of a Read Burst.
BS1=”L”, Bank C,D = Idle
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003
67
IC42S16400
ORDERING INFORMATION
Commercial Range: 0οC to 70οC
Speed (ns)
6
Order Part No.
IC42S16400-6T
IC42S16400-6TG
IC42S16400-6BG
IC42S16400-7T
IC42S16400-7TG
IC42S16400-7BG
7
Package
400mil TSOP-2
400mil TSOP-2(Pb-free)
60Ball VF-BGA(Pb-free)
400mil TSOP-2
400mil TSOP-2(Pb-free)
60Ball VF-BGA(Pb-free)
ORDERING INFORMATION
Industrial Temperature Range: -40οC to 85οC
Speed (ns)
6
7
Order Part No.
IC42S16400-6TI
IC42S16400-6TIG
IC42S16400-6BIG
IC42S16400-7TI
IC42S16400-7TIG
IC42S16400-7BIG
Package
400mil TSOP-2
400mil TSOP-2(Pb-free)
60Ball VF-BGA(Pb-free)
400mil TSOP-2
400mil TSOP-2(Pb-free)
60Ball VF-BGA(Pb-free)
Integrated Circuit Solution Inc.
HEADQUARTER:
NO.2, TECHNOLOGY RD. V, SCIENCE-BASED INDUSTRIAL PARK,
HSIN-CHU, TAIWAN, R.O.C.
TEL: 886-3-5780333
Fax: 886-3-5783000
BRANCH OFFICE:
7F, NO. 106, SEC. 1, HSIN-TAI 5TH ROAD,
HSICHIH TAIPEI COUNTY, TAIWAN, R.O.C.
TEL: 886-2-26962140
FAX: 886-2-26962252
http://www.icsi.com.tw
68
Integrated Circuit Solution Inc.
DR034-0E 12/02/2003