Mitsubishi M2V28S30ATP-8 128m synchronous dram Datasheet

128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
PRELIMINARY
(4-BANK x 2,097,152-WORD x 16-BIT)
Some of contents are described for general products and are
subject to change without notice.
DESCRIPTION
M2V28S20ATP is organized as 4-bank x 8,388,608-word x 4-bit Synchronous DRAM with LVTTL
interface and M2V28S30ATP is organized as 4-bank x 4,194,304-word x 8-bit and M2V28S40ATP is organized
as 4-bank x 2,097,152-word x 16-bit. All inputs and outputs are referenced to the rising edge of CLK.
M2V28S20ATP,M2V28S30ATP,M2V28S40ATP achieves very high speed data rates up to 133MHz,
and is suitable for main memory or graphic memory in computer systems.
FEATURES
M2V28S20/30/40ATP
ITEM
-6
tCLK
Clock Cycle Time
tRAS
Active to Precharge Command Period
(Min.)
tRCD
Row to Column Delay
(Min.)
tAC
Access Time from CLK
Ref/Active Command Period
(Max.) (CL=3)
(Min.)
tRC
Icc1
Icc6
Operation Current
Self Refresh Current
(Min.)
7.5ns
(Max.)
(Single Bank)
-7
10ns
-8
10ns
45ns
50ns
50ns
20ns
20ns
6ns
20ns
6ns
70ns
70ns
5.4ns
67.5ns
V28S20
100mA
95mA
95mA
V28S30
110mA
100mA
100mA
V28S40
130mA
120mA
120mA
2mA
2mA
2mA
(Max.)
- Single 3.3V ±0.3V power supply
- Max. Clock frequency
-6:PC133<3-3-3> / -7:PC100<2-2-2> / -8:PC100<3-2-2>
- Fully synchronous operation referenced to clock rising edge
- 4-bank operation controlled by BA0,BA1(Bank Address)
- /CAS latency- 2/3 (programmable)
- Burst length- 1/2/4/8/FP (programmable)
- Burst type- Sequential and interleave burst (programmable)
- Byte Control- DQML and DQMU (M2V28S40ATP)
- Random column access
- Auto precharge / All bank precharge controlled by A10
- Auto and self refresh
- 4096 refresh cycles /64ms
- LVTTL Interface
- Package
M2V28S20ATP/30ATP/40ATP
400-mil, 54-pin Thin Small Outline (TSOP II) with 0.8mm lead pitch
MITSUBISHI ELECTRIC
1
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
PIN CONFIGURATION (TOP VIEW)
M2V28S20ATP
M2V28S30ATP
M2V28S40ATP
PIN CONFIGURATION
(TOP VIEW)
Vdd
NC
VddQ
NC
DQ0
VssQ
NC
NC
VddQ
NC
DQ1
VssQ
NC
Vdd
NC
/WE
/CAS
/RAS
/CS
BA0(A13)
BA1(A12)
A10(AP)
A0
A1
A2
A3
Vdd
Vdd
DQ0
VddQ
NC
DQ1
VssQ
NC
DQ2
VddQ
NC
DQ3
VssQ
NC
Vdd
NC
/WE
/CAS
/RAS
/CS
BA0(A13)
BA1(A12)
A10(AP)
A0
A1
A2
A3
Vdd
Vdd
DQ0
VddQ
DQ1
DQ2
VssQ
DQ3
DQ4
VddQ
DQ5
DQ6
VssQ
DQ7
Vdd
DQML
/WE
/CAS
/RAS
/CS
BA0(A13)
BA1(A12)
A10(AP)
A0
A1
A2
A3
Vdd
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
Vss
DQ15
VssQ
DQ14
DQ13
VddQ
DQ12
DQ11
VssQ
DQ10
DQ9
VddQ
DQ8
Vss
NC
DQMU
CLK
CKE
NC
A11
A9
A8
A7
A6
A5
A4
Vss
Vss
DQ7
VssQ
NC
DQ6
VddQ
NC
DQ5
VssQ
NC
DQ4
VddQ
NC
Vss
NC
DQM
CLK
CKE
NC
A11
A9
A8
A7
A6
A5
A4
Vss
Vss
NC
VssQ
NC
DQ3
VddQ
NC
NC
VssQ
NC
DQ2
VddQ
NC
Vss
NC
DQM
CLK
CKE
NC
A11
A9
A8
A7
A6
A5
A4
Vss
CLK
: Master Clock
DQM
: Output Disable/ Write Mask
CKE
/CS
: Clock Enable
: Chip Select
A0-11
: Address Input
/RAS
: Row Address Strobe
BA0,1
Vdd
: Bank Address
: Power Supply
VddQ
Vss
: Power Supply for Output
: Ground
VssQ
: Ground for Output
/CAS
: Column Address Strobe
/WE
: Write Enable
DQ0-15
: Data I/O
MITSUBISHI ELECTRIC
2
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
BLOCK DIAGRAM
DQ0-7
I/O Buffer
Memory Array
Memory Array
Memory Array
Memory Array
4096 x1024 x8
Cell Array
4096 x1024 x8
Cell Array
4096 x1024 x8
Cell Array
4096 x1024 x8
Cell Array
Bank #0
Bank #1
Bank #2
Bank #3
Mode
Register
Control Circuitry
Address Buffer
Control Signal Buffer
Clock Buffer
A0-11
BA0,1
CLK
/CS
CKE
/RAS
/CAS
/WE
DQM
Note : This figure shows the M2V28S30ATP.
The M2V28S20ATP configration is 4096x2048x4 of cell array and DQ 0-3.
The M2V28S40ATP configration is 4096x512x16 of cell array and DQ 0-15.
Type Designation Code
These rules are only applied to the Synchronous DRAM family.
M2 V 28 S 3 0 A TP -8
Access Item
Package Type
-6 : 7.5ns (PC133/3-3-3),
-7 : 10ns(PC100/2-2-2),
-8 : 10ns(PC100/3-2-2)
TP : TSOP(II)
Process Generation
A : 2nd. gen.
Function
0 : Random Column
Organization
2: x4, 3: x8, 4: x16
Synchronous DRAM
Density
28 : 128Mbit
Interface
V : LVTTL
Mitsubishi DRAM
MITSUBISHI ELECTRIC
3
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
PIN FUNCTION
Input
Master Clock:
All other inputs are referenced to the rising edge of CLK.
CKE
Input
Clock Enable:
CKE controls internal clock. When CKE is low, internal clock for the
following cycle is ceased. CKE is also used to select auto /
selfrefresh. After self refresh mode is started, CKE becomes
synchronous input. Self refresh is maintained as long as CKE is low.
/CS
Input
Chip Select:
When /CS is high, any command means No Operation.
/RAS, /CAS, /WE
Input
Combination of /RAS, /CAS, /WE defines basic commands.
Input
A0-11 specify the Row / Column Address in conjunction with BA0,1.
The Row Address is specified by A0-11. The Column Address is
specified by A0-9,11 (x4) / A0-9 (x8) / A0-8 (x16).
A10 is also used to indicate precharge option. When A10 is high at a
read / write command, an auto precharge is performed. When A10 is
high at a precharge command, all banks are precharged.
BA0,1
Input
Bank Address:
BA0,1 specifies one of four banks to which a command is applied.
BA0,1 must be set with ACT, PRE, READ, WRITE commands.
DQ0-7
Input / Output
CLK
A0-11
Data In and Data out are referenced to the rising edge of CLK.
Din Mask / Output Disable:
When DQM is high in burst write, Din for the current cycle is masked.
When DQM is high in burst read, Dout is disabled at the next but one
cycle.
DQM
Input
Vdd, Vss
Power Supply
Power Supply for the memory array and peripheral circuitry.
VddQ, VssQ
Power Supply
VddQ and VssQ are supplied to the Output Buffers only.
MITSUBISHI ELECTRIC
4
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
BASIC FUNCTIONS
The M2V28S30ATP provides basic functions, bank (row) activate, burst read / write, bank
(row) precharge, and auto / self refresh.
Each command is defined by control signals of /RAS, /CAS and /WE at CLK rising edge. In
addition to 3 signals, /CS ,CKE and A10 are used as chip select, refresh option, and precharge option,
respectively.
To know the detailed definition of commands, please see the command truth table.
CLK
/CS
Chip Select : L=select, H=deselect
/RAS
Command
/CAS
Command
/WE
Command
CKE
Refresh Option @ refresh command
A10
Precharge Option @ precharge or read/write command
define basic commands
Activate (ACT) [/RAS =L, /CAS =/WE =H]
ACT command activates a row in an idle bank indicated by BA.
Read (READ) [/RAS =H, /CAS =L, /WE =H]
READ command starts burst read from the active bank indicated by BA. First output data
appears after /CAS latency. When A10 =H at this command, the bank is deactivated after the burst
read (auto-precharge, READA).
Write (WRITE) [/RAS =H, /CAS =/WE =L]
WRITE command starts burst write to the active bank indicated by BA. Total data length to
be written is set by burst length. When A10 =H at this command, the bank is deactivated after the
burst write (auto-precharge, WRITEA).
Precharge (PRE) [/RAS =L, /CAS =H, /WE =L]
PRE command deactivates the active bank indicated by BA. This command also terminates
burst read / write operation. When A10 =H at this command, all banks are deactivated (precharge all,
PREA ).
Auto-Refresh (REFA) [/RAS =/CAS =L, /WE =CKE =H]
REFA command starts auto-refresh cycle. Refresh address including bank address are
generated internally. After this command, the banks are precharged automatically.
MITSUBISHI ELECTRIC
5
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
COMMAND TRUTH TABLE
CKE CKE
n-1
n
COMMAND
MNEMONIC
Deselect
DESEL
H
X
H
X
X
X
X
No Operation
NOP
H
X
L
H
H
H
Row Address Entry &
Bank Activate
ACT
H
X
L
L
H
Single Bank Precharge
PRE
H
X
L
L
PREA
H
X
L
WRITE
H
X
WRITEA
H
Column Address Entry
& Read
READ
Column Address Entry &
Read with Auto-Precharge
A10
A0-9
X
X
X
X
X
X
X
H
V
V
V
V
H
L
V
X
L
X
L
H
L
X
X
H
X
L
H
L
L
V
V
L
V
X
L
H
L
L
V
V
H
V
H
X
L
H
L
H
V
V
L
V
READA
H
X
L
H
L
H
V
V
H
V
Auto-Refresh
REFA
H
H
L
L
L
H
X
X
X
X
Self-Refresh Entry
REFS
H
L
L
L
L
H
X
X
X
X
L
H
H
X
X
X
X
X
X
X
L
H
L
H
H
H
X
X
X
X
H
X
L
L
L
L
L
L
L
V*1
Precharge All Banks
Column Address Entry
& Write
Column Address Entry &
Write with Auto-Precharge
Self-Refresh Exit
Mode Register Set
/CS /RAS /CAS /WE BA0,1 A11
REFSX
MRS
H=High Level, L=Low Level, V=Valid, X=Don't Care, n=CLK cycle number
NOTE:
1. A7-A9 =0, A0-A6 =Mode Address
MITSUBISHI ELECTRIC
6
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE
Current State
/CS
IDLE
H
X
X
X
X
DESEL
NOP
L
H
H
H
X
NOP
NOP
L
H
H
L
BA
TBST
ILLEGAL*2
L
H
L
X
BA, CA, A10
READ /
WRITE
ILLEGAL*2
L
L
H
H
BA, RA
ACT
L
L
H
L
BA, A10
PRE /
PREA
NOP*4
L
L
L
H
X
REFA
Auto-Refresh*5
L
L
L
L
Op-Code,
Mode-Add
MRS
Mode Register Set*5
H
X
X
X
X
DESEL
NOP
L
H
H
H
X
NOP
NOP
L
H
H
L
BA
TBST
NOP
L
H
L
H
BA, CA, A10
L
H
L
L
BA, CA, A10
L
L
H
H
BA, RA
ACT
Bank Active / ILLEGAL*2
L
L
H
L
BA, A10
PRE /
PREA
Precharge / Precharge All
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
ROW ACTIVE
/RAS /CAS /WE Address
Command
READ /
READA
WRITE /
WRITEA
Action
Bank Active, Latch RA
Begin Read, Latch CA, Determine
Auto-Precharge
Begin Write, Latch CA, Determine
Auto-Precharge
MITSUBISHI ELECTRIC
7
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE (continued)
Current State
/CS
READ
H
X
X
X
X
DESEL
NOP (Continue Burst to END)
L
H
H
H
X
NOP
NOP (Continue Burst to END)
L
H
H
L
BA
TBST
Terminate Burst
L
H
L
H
BA, CA, A10
READ
/READA
Terminate Burst, Latch CA, Begin New
Read, Determine Auto-Precharge*3
L
H
L
L
BA, CA, A10
WRITE /
WRITEA
Terminate Burst, Latch CA, Begin
Write, Determine Auto-Precharge*3
L
L
H
H
BA, RA
ACT
L
L
H
L
BA, A10
PRE /
PREA
Terminate Burst, Precharge
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
H
X
X
X
X
DESEL
NOP (Continue Burst to END)
L
H
H
H
X
NOP
NOP (Continue Burst to END)
L
H
H
L
BA
TBST
Terminate Burst
L
H
L
H
BA, CA, A10
L
H
L
L
BA, CA, A10
L
L
H
H
BA, RA
ACT
L
L
H
L
BA, A10
PRE /
PREA
Terminate Burst, Precharge
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
WRITE
/RAS /CAS /WE Address
Command
READ /
READA
WRITE /
WRITEA
Action
Bank Active / ILLEGAL*2
Terminate Burst, Latch CA, Begin
Read, Determine Auto-Precharge*3
Terminate Burst, Latch CA,Begin
Write, Determine Auto-Precharge*3
Bank Active / ILLEGAL*2
MITSUBISHI ELECTRIC
8
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE (continued)
Current State
READ with
AUTO
PRECHARGE
WRITE with
AUTO
PRECHARGE
/CS
/RAS /CAS /WE Address
Command
Action
H
X
X
X
X
DESEL
NOP (Continue Burst to END)
L
H
H
H
X
NOP
NOP (Continue Burst to END)
L
H
H
L
BA
TBST
ILLEGAL
L
H
L
H
BA, CA, A10
L
H
L
L
BA, CA, A10
L
L
H
H
BA, RA
ACT
L
L
H
L
BA, A10
PRE /
PREA
ILLEGAL*2
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
H
X
X
X
X
DESEL
NOP (Continue Burst to END)
L
H
H
H
X
NOP
NOP (Continue Burst to END)
L
H
H
L
BA
TBST
ILLEGAL
L
H
L
H
BA, CA, A10
L
H
L
L
BA, CA, A10
L
L
H
H
BA, RA
ACT
L
L
H
L
BA, A10
PRE /
PREA
ILLEGAL*2
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
READ /
READA
WRITE /
WRITEA
READ /
READA
WRITE /
WRITEA
ILLEGAL
ILLEGAL
Bank Active / ILLEGAL*2
ILLEGAL
ILLEGAL
Bank Active / ILLEGAL*2
MITSUBISHI ELECTRIC
9
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE (continued)
Current State
PRE CHARGING
ROW
ACTIVATING
/CS
/RAS /CAS /WE Address
Command
Action
H
X
X
X
X
DESEL
NOP (Idle after tRP)
L
H
H
H
X
NOP
NOP (Idle after tRP)
L
H
H
L
BA
TBST
ILLEGAL*2
L
H
L
X
BA, CA, A10
READ /
WRITE
ILLEGAL*2
L
L
H
H
BA, RA
ACT
ILLEGAL*2
L
L
H
L
BA, A10
PRE /
PREA
NOP*4 (Idle after tRP)
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
H
X
X
X
X
DESEL
NOP (Row Active after tRCD)
L
H
H
H
X
NOP
NOP (Row Active after tRCD)
L
H
H
L
BA
TBST
ILLEGAL*2
L
H
L
X
BA, CA, A10
READ /
WRITE
ILLEGAL*2
L
L
H
H
BA, RA
ACT
ILLEGAL*2
L
L
H
L
BA, A10
PRE /
PREA
ILLEGAL*2
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
MITSUBISHI ELECTRIC
10
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE (continued)
Current State
WRITE
RECOVERING
REFRESHING
/CS
/RAS /CAS /WE Address
Command
Action
H
X
X
X
X
DESEL
NOP
L
H
H
H
X
NOP
NOP
L
H
H
L
BA
TBST
ILLEGAL*2
L
H
L
X
BA, CA, A10
READ /
WRITE
ILLEGAL*2
L
L
H
H
BA, RA
ACT
ILLEGAL*2
L
L
H
L
BA, A10
PRE /
PREA
ILLEGAL*2
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
H
X
X
X
X
DESEL
NOP (Idle after tRC)
L
H
H
H
X
NOP
NOP (Idle after tRC)
L
H
H
L
BA
TBST
ILLEGAL
L
H
L
X
BA, CA, A10
READ /
WRITE
ILLEGAL
L
L
H
H
BA, RA
ACT
ILLEGAL
L
L
H
L
BA, A10
PRE /
PREA
ILLEGAL
L
L
L
H
X
REFA
ILLEGAL
L
L
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
MITSUBISHI ELECTRIC
11
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE (continued)
Current State
MODE
REGISTER
SETTING
/CS
/RAS /CAS /WE Address
Command
Action
H
X
X
X
X
DESEL
NOP (Idle after tRSC)
L
H
H
H
X
NOP
NOP (Idle after tRSC)
L
H
H
L
BA
L
H
L
X
BA, CA, A10
L
L
H
H
L
L
H
L
L
L
L
TBST
ILLEGAL
READ /
WRITE
ILLEGAL
BA, RA
ACT
ILLEGAL
L
BA, A10
PRE /
PREA
ILLEGAL
L
H
X
REFA
ILLEGAL
L
L
Op-Code,
Mode-Add
MRS
ILLEGAL
ABBREVIATIONS:
H=High Level, L=Low Level, X=Don't Care
BA=Bank Address, RA=Row Address, CA=Column Address, NOP=No OPeration
NOTES:
1. All entries assume that CKE was High during the preceding clock cycle and the current clock cycle.
2. ILLEGAL to bank in specified state; function may be legal in the bank indicated by BA, depending on
the state of that bank.
3. Must satisfy bus contention, bus turn around, write recovery requirements.
4. NOP to bank precharging or in idle state. May precharge bank indicated by BA.
5. ILLEGAL if any bank is not idle.
ILLEGAL = Device operation and/or data-integrity are not guaranteed.
MITSUBISHI ELECTRIC
12
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
FUNCTION TRUTH TABLE for CKE
Current State
SELFREFRESH*1
POWER
DOWN
ALL BANKS
IDLE*2
ANY STATE
other than
listed above
CKE
n-1
CKE
n
/CS
H
X
X
X
L
H
H
L
H
L
/RAS /CAS
/WE
Add
Action
X
X
X
INVALID
X
X
X
X
Exit Self-Refresh (Idle after tRC)
L
H
H
H
X
Exit Self-Refresh (Idle after tRC)
H
L
H
H
L
X
ILLEGAL
L
H
L
H
L
X
X
ILLEGAL
L
H
L
L
X
X
X
ILLEGAL
L
L
X
X
X
X
X
NOP (Maintain Self-Refresh)
H
X
X
X
X
X
X
INVALID
L
H
X
X
X
X
X
Exit Power Down to Idle
L
L
X
X
X
X
X
NOP (Maintain Power Down)
H
H
X
X
X
X
X
Refer to Function Truth Table
H
L
L
L
L
H
X
Enter Self-Refresh
H
L
H
X
X
X
X
Enter Power Down
H
L
L
H
H
H
X
Enter Power Down
H
L
L
H
H
L
X
ILLEGAL
H
L
L
H
L
X
X
ILLEGAL
H
L
L
L
X
X
X
ILLEGAL
L
X
X
X
X
X
X
Refer to Current State =Power Down
H
H
X
X
X
X
X
Refer to Function Truth Table
H
L
X
X
X
X
X
Begin CLK Suspend at Next Cycle*3
L
H
X
X
X
X
X
Exit CLK Suspend at Next Cycle*3
L
L
X
X
X
X
X
Maintain CLK Suspend
ABBREVIATIONS:
H=High Level, L=Low Level, X=Don't Care
NOTES:
1. 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.
2. Power-Down and Self-Refresh can be entered only from the All Banks Idle State.
3. Must be legal command.
MITSUBISHI ELECTRIC
13
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
SIMPLIFIED STATE DIAGRAM
SELF
REFRESH
REFS
REFSX
MODE
REGISTER
SET
MRS
REFA
IDLE
AUTO
REFRESH
CKEL
CLK
SUSPEND
CKEH
ACT
POWER
DOWN
CKEL
CKEH
ROW
ACTIVE
WRITE
WRITE
SUSPEND
READ
WRITEA
CKEL
READA
READ
WRITE
WRITE
CKEH
READA
WRITEA
POWER
APPLIED
READ
SUSPEND
CKEH
WRITEA
WRITEA
SUSPEND
CKEL
READ
READA
CKEL
CKEL
WRITEA
PRE
CKEH
CKEH
POWER
ON
READA
PRE
PRE
READA
SUSPEND
PRE
PRE
CHARGE
Automatic Sequence
Command Sequence
MITSUBISHI ELECTRIC
14
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
POWER ON SEQUENCE
Before starting normal operation, the following power on sequence is necessary to prevent a
SDRAM from damaged or malfunctioning.
1. Apply power and start clock. Attempt to maintain CKE high, DQM high and NOP condition at
the inputs.
2. Maintain stable power, stable clock, and NOP input conditions for a minimum of 200µs.
3. Issue precharge commands for all banks. (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 register.
After these sequence, the SDRAM is idle state and ready for normal operation.
MODE REGISTER
Burst Length, Burst Type and /CAS Latency can be
programmed by setting the mode register (MRS). The mode
register stores these data until the next MRS command, which
may be issued when all banks are in idle state. After tRSC
from a MRS command, the SDRAM is ready for new
command.
CLK
/CS
/RAS
/CAS
/WE
V
BA0,1 A11-A0
BA0 BA1 A11 A10 A9
0
0
CL
LATENCY
MODE
0
0
A8
0
A7 A6
0
0
/CAS LATENCY
000
001
R
R
010
011
100
101
110
111
2
3
R
R
R
R
A5
A4 A3
LTMODE
A2
BT
A1 A0
BL
BURST
LENGTH
BURST
TYPE
BL
BT= 0
BT= 1
000
001
010
011
100
1
2
4
8
R
1
2
4
8
R
101
110
111
R
R
FP
R
R
R
0
1
SEQUENTIAL
INTERLEAVED
R: Reserved for Future Use
MITSUBISHI ELECTRIC
15
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
CLK
Command
Read
Write
Address
Y
Y
Q0
DQ
CL= 3
BL= 4
/CAS Latency
Q1
Q2
Q3
D0
Burst Length
D1
D2
D3
Burst Length
Burst Type
Initial Address
BL
Column Addressing
A2
A1 A0
0
0
0
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
0
1
1
2
3
4
5
6
7
0
1
0
3
2
5
4
7
6
0
1
0
2
3
4
5
6
7
0
1
2
3
0
1
6
7
4
5
0
1
1
3
4
5
6
7
0
1
2
3
2
1
0
7
6
5
4
Sequential
Interleaved
8
1
0
0
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
1
0
1
5
6
7
0
1
2
3
4
5
4
7
6
1
0
3
2
1
1
0
6
7
0
1
2
3
4
5
6
7
4
5
2
3
0
1
1
1
1
7
0
1
2
3
4
5
6
7
6
5
4
3
2
1
0
-
0
0
0
1
2
3
0
1
2
3
-
0
1
1
2
3
0
1
0
3
2
4
-
1
0
2
3
0
1
2
3
0
1
-
1
1
3
0
1
2
3
2
1
0
-
-
0
0
1
0
1
1
0
1
0
2
-
-
1
MITSUBISHI ELECTRIC
16
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
OPERATIONAL DESCRIPTION
BANK ACTIVATE
The SDRAM has four independent banks. Each bank is activated by the ACT command with
the bank addresses (BA0,1). A row is indicated by the row addresses A0-11. The minimum activation
interval between one bank and the other bank is tRRD. Maximum 2 ACT commands are allowed within
tRC , although the number of banks which are active concurrently is not limited.
PRECHARGE
The PRE command deactivates the bank indicated by BA0,1. When multiple banks are active,
the precharge all command (PREA, PRE + A10=H) is available to deactivate them at the same time.
After tRP from the precharge, an ACT command to the same bank can be issued.
Bank Activation and Precharge All (BL=4, CL=3)
CLK
2 ACT command / tRCmin
tRCmin
Command
ACT
ACT READ
tRRD
A0-9
Xa
PRE
ACT
tRAS
Xb
Y
0
tRP
Xb
tRCD
A10
Xa
Xb
A11
Xa
Xb
BA0,1
00
01
DQ
1
Xb
Xb
00
01
Qa0
Qa1
Qa2
Qa3
Precharge all
READ
After tRCD from the bank activation, a READ command can be issued. 1st output data is
available after the /CAS Latency from the READ, followed by (BL -1) consecutive data when the
Burst Length is BL. The start address is specified by A0-A9,A11(x4), A0-9(X8), A0-8(X16) , and
the address sequence of burst data is defined by the Burst Type. A READ command may be applied
to any active bank, so the row precharge time (tRP) can be hidden behind continuous output data by
interleaving the multiple banks. When A10 is high at a READ command, the auto-precharge
(READA) is performed. Any command (READ, WRITE, PRE, ACT) to the same bank is inhibited
till the internal precharge is complete. The internal precharge starts at BL after READA. (Need to
keep tRAS min.) The next ACT command can be issued after (BL + tRP) from the previous READA.
MITSUBISHI ELECTRIC
17
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Multi Bank Interleaving READ (BL=4, CL=3)
CLK
Command
ACT
READ ACT
READ PRE
tRCD
A0-9
Xa
Y
Xb
Y
A10
Xa
0
Xb
0
0
A11
Xa
BA0,1
00
10
00
Qa1
Qa2
Xb
00
10
DQ
Qa0
/CAS latency
Qa3
Qb0
Qb1
Qb2
Burst Length
READ with Auto-Precharge (BL=4, CL=3)
CLK
BL + tRP
Command
ACT
A0-9
Xa
Y
Xa
A10
Xa
1
Xa
A11
Xa
BA0,1
00
READ
tRCD
ACT
BL
tRP
Xa
00
00
Qa0
DQ
Qa1
Qa2
Qa3
Internal precharge start
READ Auto-Precharge Timing (BL=4)
CLK
Command
ACT
READ
BL
CL=3
DQ
CL=2
DQ
Qa0
Qa0
Qa1
Qa2
Qa1
Qa2
Qa3
Qa3
Internal Precharge Start Timing
MITSUBISHI ELECTRIC
18
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
WRITE
After tRCD from the bank activation, a WRITE command can be issued. 1st input data is set
at the same cycle as the WRITE. Following (BL -1) data are written into the RAM, when the Burst
Length is BL. The start address is specified by A0-A9,A11(x4), A0-9(X8), A0-8(X16) and the
address sequence of burst data is defined by the Burst Type. A WRITE command may be applied to
any active bank, so the row precharge time (tRP) can be hidden behind continuous input data by
interleaving the multiple banks. From the last input data to the PRE command, the write recovery time
(tWR) is required. When A10 is high at a WRITE command, the autoprecharge (WRITEA) is
performed. Any command (READ, WRITE, PRE, ACT) to the same bank is inhibited till the internal
precharge is complete. The internal precharge begins at tWR after the last input data cycle. (Need to
keep tRAS min.) The next ACT command can be issued after tRP from the internal precharge timing.
Multi Bank Interleaving WRITE (BL=4)
CLK
Command
ACT
Write
ACT
A0-9
Xa
Y
Xb
Y
A10
Xa
Xa
0
Xb
0
A11
Xa
Xa
BA0,1
00
tRCD
Write
PRE
PRE
0
0
0
0
10
00
10
Db0
Db1
tRCD
Xb
DQ
00
10
Da0
Da1
Da2
Da3
Db2
Db3
WRITE with Auto-Precharge (BL=4)
CLK
Command
ACT
Write
ACT
A0-9
Xa
Y
Xa
A10
Xa
1
Xa
A11
Xa
BA0,1
00
tRCD
DQ
tWR
tRP
Xa
00
Da0
00
Da1
Da2
Da3
Internal precharge starts
MITSUBISHI ELECTRIC
19
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
BURST INTERRUPTION
[ Read Interrupted by Read ]
Burst read operation can be interrupted by new read of any bank. Random column access is
allowed READ to READ interval is minimum 1 CLK..
Read Interrupted by Read (BL=4, CL=3)
CLK
Command
READ READ
READ
READ
A0-9
Yi
Yj
Yk
Yl
A10
0
0
0
0
00
00
10
01
A11
BA0,1
Qai0
DQ
Qaj0
Qaj1 Qbk0 Qbk1 Qbk2
Qal0
Qal1
Qal2
Qal3
[ Read Interrupted by Write ]
Burst read operation can be interrupted by write of any bank. Random column access is
allowed. In this case, the DQ should be controlled adequately by using the DQM to prevent the bus
contention. The output is disabled automatically 1 cycle after WRITE assertion.
Read Interrupted by Write (BL=4, CL=3)
CLK
Command
READ
Write
A0-9
Yi
Yj
A10
0
0
00
00
A11
BA0,1
DQM
Q
D
Qai0
Daj0
DQM control
Daj1
Daj2
Daj3
Write control
MITSUBISHI ELECTRIC
20
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
[ Read Interrupted by Precharge ]
Burst read operation can be interrupted by precharge of the same bank . READ to PRE
interval is minimum 1 CLK. A PRE command to output disable latency is equivalent to the /CAS
Latency. As a result, READ to PRE interval determines valid data length to be output. The figure
below shows examples of BL=4.
Read Interrupted by Precharge (BL=4)
CLK
Command
PRE
READ
DQ
Command
CL=3
READ
CL=2
READ
DQ
PRE
Q0
READ
Q1
Q2
PRE
Q0
DQ
Command
Q1
Q0
DQ
Command
Q0
Q2
READ PRE
DQ
Command
Q1
PRE
DQ
Command
Q0
Q1
READ PRE
Q0
MITSUBISHI ELECTRIC
21
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
[ Write Interrupted by Write ]
Burst write operation can be interrupted by new write of any bank. Random column access is
allowed. WRITE to WRITE interval is minimum 1 CLK.
Write Interrupted by Write (BL=4)
CLK
Command
Write Write
Write
Write
A0-9
Yi
Yj
Yk
Yl
A10
0
0
0
0
BA0,1
00
00
10
00
DQ
Dai0
A11
Daj0 Daj1 Dbk0 Dbk1 Dbk2 Dal0
Dal1
Dal2
Dal3
[ Write Interrupted by Read ]
Burst write operation can be interrupted by read of the same or the other bank. Random
column access is allowed. WRITE to READ interval is minimum 1 CLK. The input data on DQ at the
interrupting READ cycle is "don't care".
Write Interrupted by Read (BL=4, CL=3)
CLK
Command
Write READ
Write
READ
A0-9
Yi
Yj
Yk
Yl
A10
0
0
0
0
00
00
10
00
A11
BA0,1
DQM
DQ
Dai0
Qaj0
Qaj1
Dbk0 Dbk1
MITSUBISHI ELECTRIC
Qal0
22
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
[ Write Interrupted by Precharge ]
Burst write operation can be interrupted by precharge of the same bank. Random column
access is allowed. Write recovery time (tWR) is required from the last data to PRE command.
Write Interrupted by Precharge (BL=4)
CLK
Command
Write
A0-9
Yi
A10
0
PRE
tWR
tRP
Xb
0
Xb
Xb
A11
BA0,1
ACT
00
00
00
DQM
DQ
Dai0
Dai1
Dai2
MITSUBISHI ELECTRIC
23
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
AUTO REFRESH
Single cycle of auto-refresh is initiated with a REFA (/CS= /RAS= /CAS= L, /WE= /CKE= H)
command. The refresh address is generated internally. 4096 REFA cycles within 64ms refresh
128Mbit memory cells. The auto-refresh is performed on 4 banks concurrently. Before performing an
auto-refresh, all banks must be in the idle state. Auto-refresh to auto-refresh interval is minimum tRC.
Any command must not be supplied to the device before tRC from the REFA command.
Auto-Refresh
CLK
/CS
NOP or DESELECT
/RAS
/CAS
/WE
CKE
minimum tRC
A0-11
BA0,1
Auto Refresh on All Banks
Auto Refresh on All Banks
MITSUBISHI ELECTRIC
24
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
SELF REFRESH
Self-refresh mode is entered by issuing a REFS command (/CS= /RAS= /CAS= L, /WE= H,
CKE= L). Once the self-refresh is initiated, it is maintained as long as CKE is kept low. During the
self-refresh mode, CKE is asynchronous and the only enabled input ,all other inputs including CLK
are disabled and ignored, so that power consumption due to synchronous inputs is saved. To exit the
self-refresh, supplying stable CLK inputs, asserting DESEL or NOP command and then asserting
CKE (REFSX) for longer than tSRX. After tRC from REFSX all banks are in the idle state and a new
command can be issued, but DESEL or NOP commands must be asserted till then.
Self-Refresh
CLK
Stable CLK
/CS
NOP
/RAS
/CAS
/WE
CKE
tSRX
new command
A0-11
X
BA0,1
00
Self Refresh Entry
Self Refresh Exit
MITSUBISHI ELECTRIC
minimum tRC
+1 CLOCK
for recovery
25
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
CLK SUSPEND
CKE controls the internal CLK at the following cycle. Figure below shows how CKE works.
By negating CKE, the next internal CLK is suspended. The purpose of CLK suspend is power down,
output suspend or input suspend. CKE is a synchronous input except during the self-refresh mode.
CLK suspend can be performed either when the banks are active or idle. A command at the suspended
cycle is ignored.
ext.CLK
CKE
int.CLK
Power Down by CKE
CLK
Standby Power Down
CKE
Command
PRE
NOP
NOP
NOP NOP
Active Power Down
CKE
Command
NOP NOP NOP
ACT
NOP
NOP
NOP NOP NOP
NOP NOP
DQ Suspend by CKE
CLK
CKE
Command
Write
DQ
D0
READ
D1
D2
D3
Q0
MITSUBISHI ELECTRIC
Q1
Q2
Q3
26
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
DQM CONTROL
DQM is a dual function signal defined as the data mask for writes and the output disable for
reads. During writes, DQM masks input data word by word. DQM to write mask latency is 0.
During reads, DQM forces output to Hi-Z word by word. DQM to output Hi-Z latency is 2.
DQM Function
CLK
Command
Write
READ
DQM
DQ
D0
D2
D3
masked by DQM=H
MITSUBISHI ELECTRIC
Q0
Q1
Q3
disabled by DQM=H
27
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Conditions
Ratings
Supply Voltage
with respect to Vss
-0.5 - 4.6
V
Supply Voltage for Output
with respect to VssQ
-0.5 - 4.6
V
VI
Input Voltage
with respect to Vss
-0.5 - 4.6
V
VO
Output Voltage
with respect to VssQ
-0.5 - 4.6
V
IO
Output Current
Pd
Power Dissipation
Vdd
VddQ
Ta = 25ºC
Unit
50
mA
1000
mW
Topr
Operating Temperature
0 - 70
ºC
Tstg
Storage Temperature
-65 - 150
ºC
RECOMMENDED OPERATING CONDITIONS
(Ta=0 – 70ºC, unless otherwise noted )
Symbol
Limits
Parameter
Unit
Min.
Typ.
Max.
Vdd
Supply Voltage
3.0
3.3
3.6
V
Vss
Supply Voltage
0
0
0
V
VddQ
Supply Voltage for Output
3.0
3.3
3.6
V
VssQ
Supply Voltage for Output
0
0
0
V
VIH*1
High-level Input Voltage all inputs
2.0
VddQ +0.3
V
VIL*2
Low-level Input Voltage all inputs
-0.3
0.8
V
NOTES)
1. VIH(max)=5.5V for pulse width less than 10ns.
2. VIL(min)=-1.0V for pulse width less than 10ns.
CAPACITANCE
(Ta=0 – 70ºC, Vdd= VddQ= 3.3 ± 0.3V, Vss= VssQ= 0V, unless otherwise noted )
Symbol
Test Condition
Parameter
CI(A)
Input Capacitance, address pin
CI(C)
Input Capacitance, contorl pin
CI(K)
Input Capacitance, CLK pin
CI/O
Input Capacitance, I/O pin
@ 1MHz
1.4V bias
200mV swing
Vcc=3.3V
Limits (min.)
Limits (max.)
-6 (PC133) -7/-8(PC100)
Unit
2.5
3.8
5.0
pF
2.5
3.8
5.0
pF
2.5
3.5
4.0
pF
4.0
6.5
6.5
pF
MITSUBISHI ELECTRIC
28
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
AVERAGE SUPPLY CURRENT from Vdd
(Ta=0 – 70ºC, Vdd= VddQ= 3.3 ± 0.3V, Vss= VssQ= 0V, unless otherwise noted )
ITEM
Organization
Symbol
-8
x4
100
95
95
110
100
100
x16
130
120
120
Icc2N
x4/x8/x16
25
25
Icc2NS
x4/x8/x16
15
tCLK = 15ns
CKE = L
Icc2P
x4/x8/x16
CLK = L
CKE = L
Icc2PS
CKE = H, tCLK=15ns
CKE = H, CLK=L
single bank operation
Icc1
tCLK = 15ns
CKE = H
VIH > Vcc - 0.2V
VIL < 0.2V
precharge standby
current in Non Power
down mode
CLK = L & CKE = H
VIH > Vcc - 0.2V
VIL < 0.2V
all input signals are fixed.
/CS > Vcc -0.2V
precharge standby
current in Power down
mode
/CS > Vcc -0.2V
mA
*1
25
mA
*1
15
15
mA
*1
2
2
2
mA
*1
x4/x8/x16
1
1
1
mA
*1
Icc3N
x4/x8/x16
30
30
30
mA
*1
Icc3NS
x4/x8/x16
20
20
20
x4
140
110
110
x8
150
120
120
mA
*1
x16
160
130
130
160
160
160
mA
*1
active standby current
burst current
Unit Note
-7
x8
operating current
tRC=min, tCLK =min,
BL=1 , CL=3
Limits (max.)
-6
All Bank Active
tCLK = min
BL=4, CL=3
Icc4
auto-refresh current
tRC=min, tCLK=min
Icc5
x4/x8/x16
self-refresh current
CKE < 0.2V
Icc6
x4/x8/x16
2
2
2
mA
*1
0.8
0.8
0.8
mA
*1,2
NOTE)
1. Icc(max) is specified at the output open condition.
2. Low Power version. (-6L,-7L,-8L only)
AC OPERATING CONDITIONS AND CHARACTERISTICS
(Ta=0 – 70ºC, Vdd= VddQ= 3.3 ± 0.3V, Vss= VssQ= 0V, unless otherwise noted )
Symbol
Parameter
Limits
Test Conditions
Min.
VOH (DC)
High-Level Output Voltage (DC)
IOH=-2mA
VOL (DC)
Low-level Output Voltage (DC)
IOL= 2mA
IOZ
Off-state Output Current
Q floating VO=0 -- VddQ
II
Input Current
VIH = 0 -- VddQ +0.3V
MITSUBISHI ELECTRIC
unit
Max.
V
2.4
0.4
V
-10
10
µA
-10
10
µA
29
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
AC TIMING REQUIREMENTS
(Ta=0 – 70ºC, Vdd= VddQ= 3.3 ± 0.3V, Vss= VssQ= 0V, unless otherwise noted )
Input Pulse Levels:
0.8V – 2.0V
Input Timing Measurement Level:
1.4V
Limits
Symbol
-6
Parameter
Min.
tCLK
CLK cycle time
-7
Max.
Min.
Unit
-8
Max.
Min.
Max.
CL=2
10
10
13
ns
CL=3
7.5
10
10
ns
tCH
CLK High pulse width
2.5
3
3
ns
tCL
CLK Low pulse width
2.5
3
3
ns
Transition time of CLK
1
tT
10
10
1
1
10
ns
tIS
Input Setup time
(all inputs)
1.5
2
2
ns
tIH
Input Hold time
(all inputs)
0.8
1
1
ns
tRC
Row Cycle time
67.5
70
70
ns
20
20
ns
tRCD
Row to Column Delay
20
tRAS
Row Active time
45
100K
100K
50
50
100K
ns
tRP
Row Precharge time
20
20
20
ns
tWR
Write Recovery time
15
20
20
ns
tRRD
Act to Act Delay time
15
20
20
ns
tRSC
Mode Register Set Cycle time
15
20
20
ns
tSRX
Self-refresh Exit time
7.5
10
10
ns
tPDE
Power Down Exit time
7.5
10
10
ns
tREF
Refresh Interval time
64
CLK
1.4V
DQ
1.4V
64
64
ms
Any AC timing is referenced
to the input signal passing
through 1.4V.
MITSUBISHI ELECTRIC
30
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
SWITCHING CHARACTERISTICS
(Ta=0 – 70ºC, Vdd= VddQ= 3.3 ± 0.3V, Vss= VssQ= 0V, unless otherwise noted )
Limits
Symbol
Parameter
-6
Min.
tAC
tOH
Access time from CLK
Output Hold time from CLK
-8
-7
Max.
Max.
Min.
Min.
Unit Note
Max.
CL=2
6
6
7
ns
CL=3
5.4
6
6
ns
CL=2
CL=3
3
3
3
ns
2.7
3
3
ns
0
0
ns
tOLZ
Delay time, output lowimpedance from CLK
0
tOHZ
Delay time, output highimpedance from CLK
2.7
5.4
3
6
3
6
*1
ns
NOTE)
1. If clock rising time is longer than 1ns, (tr /2–0.5ns) should be added to the parameter.
Output Load Condition
CLK
VOUT
1.4V
50pF
DQ
1.4V
Output Timing Measurement
Reference Point
CLK
1.4V
tOLZ
DQ
1.4V
tAC
tOH
tOHZ
MITSUBISHI ELECTRIC
31
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Burst Write (single bank) @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
tRC
/CS
tRAS
tRP
/RAS
tRCD
tRCD
/CAS
/WE
tWR
CKE
DQM
A0-8
X
Y
A10
X
X
A9,11
X
X
BA0,1
0
0
D0
DQ
ACT#0
X
0
D0
WRITE#0
D0
0
D0
Y
0
D0
PRE#0
ACT#0
D0
D0
D0
WRITE#0
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
32
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Burst Write (multi bank) @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
tRC
/CS
tRRD
tRRD
tRAS
tRP
/RAS
tRCD
tRCD
/CAS
/WE
tWR
tWR
CKE
DQM
A0-8
X
X
A10
X
A9,11
BA0,1
X
X
X
X
X
X
X
X
X
0
1
DQ
Y
0
D0
ACT#0
Y
D0
WRITE#0
ACT#1
D0
D0
1
0
D1
D1
0
D1
PRE#0
WRITE#1
D1
1
2
Y
0
D0
ACT#0
D0
D0
D0
ACT#2 WRITE#0
PRE#1
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
33
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Burst Read (single bank) @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
tRC
/CS
tRAS
tRP
/RAS
tRCD
tRCD
/CAS
/WE
CKE
DQM
DQM read latency =2
A0-8
X
A10
X
X
A9,11
X
X
BA0,1
0
Y
X
0
0
0
Y
0
CL=3
Q0
DQ
ACT#0
READ#0
Q0
Q0
PRE#0
Q0
Q0
ACT#0
Q0
READ#0
READ to PRE ³BL allows full data out
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
34
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Burst Read (multiple bank) @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
tRC
/CS
tRRD
tRRD
tRAS
tRP
/RAS
tRCD
tRCD
/CAS
/WE
CKE
DQM
DQM read latency =2
A0-8
X
X
A10
X
A9,11
BA0,1
Y
Y
X
X
X
X
X
X
X
X
X
0
1
0
1
0
Q0
Q0
CL=3
DQ
READ#0
ACT#1
1
2
Q1
Q1
Q1
0
CL=3
Q0
ACT#0
0
Y
Q0
PRE#0
READ#1
Q1
ACT#0
PRE#1
Q0
READ#0
ACT#2
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
35
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Burst Write (multi bank) with Auto-Precharge @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
tRC
/CS
tRRD
tRRD
/RAS
tRCD
tRCD
tRCD
/CAS
BL-1+ tWR + tRP
BL-1+ tWR + tRP
/WE
CKE
DQM
A0-8
X
X
A10
X
X
X
X
A9,11
X
X
X
X
BA0,1
0
1
Y
0
D0
DQ
ACT#0
ACT#1
Y
X
1
D0
D0
WRITE#0 with
AutoPrecharge
D0
D1
D1
D1
Y
X
0
0
1
D1
D0
D0
ACT#0
WRITE#1 with
AutoPrecharge
Y
1
D0
D0
D1
WRITE#0
ACT#1
WRITE#1
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
36
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Burst Read (multiple bank) with Auto-Precharge @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
tRC
/CS
tRRD
tRRD
/RAS
tRCD
tRCD
tRCD
/CAS
BL+tRP
BL+tRP
/WE
CKE
DQM
DQM read latency =2
A0-8
X
X
Y
Y
A10
X
X
X
X
A9,11
X
X
X
X
BA0,1
0
1
0
1
CL=3
DQ
Y
0
0
CL=3
Q0
ACT#0
ACT#1
X
READ#0 with
Auto-Precharge
Q0
Q0
X
Y
1
1
CL=3
Q0
Q1
Q1
ACT#0
READ#1 with
Auto-Precharge
Q1
Q1
Q0
Q0
READ#0
ACT#1
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
37
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Page Mode Burst Write (multi bank) @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRRD
/RAS
tRCD
/CAS
/WE
CKE
DQM
A0-8
X
X
A10
X
X
A9,11
X
X
BA0,1
0
1
DQ
Y
Y
Y
Y
0
0
1
0
D0
ACT#0
D0
WRITE#0
ACT#1
D0
D0
D0
D0
D0
D0
D1
D1
WRITE#0
D1
D1
D0
D0
D0
WRITE#0
WRITE#1
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
38
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Page Mode Burst Read (multi bank) @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRRD
/RAS
tRCD
/CAS
/WE
CKE
DQM
DQM read latency=2
A0-8
X
X
A10
X
X
A9,11
X
X
BA0,1
0
1
Y
Y
Y
Y
0
0
1
0
CL=3
DQ
CL=3
Q0
ACT#0
READ#0
ACT#1
Q0
Q0
Q0
CL=3
Q0
Q0
Q0
READ#0
Q0
Q1
Q1
Q1
Q1
READ#0
READ#1
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
39
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Write Interrupted by Write / Read @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRRD
/RAS
tRCD
tCCD
/CAS
/WE
CKE
DQM
A0-8
X
X
A10
X
X
A9,11
X
X
BA0,1
0
1
Y
Y
Y
Y
Y
0
0
0
1
0
D0
D0
CL=3
D0
DQ
ACT#0
D0
D0
D0
D1
D1
Q0
Q0
Q0
Q0
WRITE#0 WRITE#0 WRITE#0
READ#0
ACT#1
WRITE#1
Burst Write can be interrupted by Write or Read of any active bank.
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
40
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Read Interrupted by Read / Write @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRRD
/RAS
tRCD
/CAS
/WE
CKE
DQM
DQM read latency=2
A0-8
X
X
A10
X
X
A9,11
X
X
BA0,1
0
1
DQ
ACT#0
Y
Y
Y
Y
Y
Y
0
0
0
1
0
0
Q0
Q0
Q0
Q0
Q0
Q0
Q1
Q1
Q0
D0
D0
READ#0 READ#0 READ#0
READ#0
WRITE#0
ACT#1
READ#1
blank to prevent bus contention
Burst Read can be interrupted by Read or Write of any active bank.
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
41
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Write Interrupted by Precharge @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRRD
/RAS
tRCD
/CAS
/WE
CKE
DQM
A0-8
X
X
Y
A10
X
X
X
A9,11
X
X
X
BA0,1
0
1
0
D0
DQ
ACT#0
Y
D0
WRITE#0
ACT#1
D0
D0
X
1
0
D1
D1
1
1
1
D1
PRE#0
WRITE#1
PRE#1
Burst Write is not interrupted
by Precharge of the other bank.
Y
ACT#1
D1
D1
WRITE#1
Burst Write is interrupted by
Precharge of the same
bank.
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
42
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Read Interrupted by Precharge @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRP
tRRD
/RAS
tRCD
tRCD
/CAS
/WE
CKE
DQM
DQM read latency=2
A0-8
X
X
Y
Y
A10
X
X
X
A9,11
X
X
X
BA0,1
0
1
0
Q0
DQ
ACT#0
READ#0
ACT#1
X
1
0
1
Q0
Q0
Q0
1
Q1
1
Q1
PRE#0
READ#1
PRE#1
Burst Read is not interrupted
by Precharge of the other bank.
Y
ACT#1
READ#1
Burst Read is interrupted
by Precharge of the same bank.
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
43
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Mode Register Setting
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRSC
tRC
/RAS
tRCD
/CAS
/WE
CKE
DQM
M
A0-8
X
A10
X
A9,11
X
0
BA0,1
0
Y
0
D0
DQ
Auto-Ref (last of 8 cycles)
Mode
Register
Setting
ACT#0
D0
D0
D0
WRITE#0
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
44
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Auto-Refresh @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
tRC
/RAS
tRCD
/CAS
/WE
CKE
DQM
A0-8
X
A10
X
A9,11
X
BA0,1
0
Y
0
DQ
D0
D0
D0
Auto-Refresh
ACT#0
Before Auto-Refresh,
all banks must be idle
state.
After tRC from Auto-Refresh,
all banks are idle state.
D0
WRITE#0
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
45
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Self-Refresh
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
CLK can be stopped
tRC
/CS
/RAS
/CAS
/WE
tSRX
CKE
CKE must be low to maintain Self-Refresh
DQM
X
A0-8
X
A10
X
A9,11
0
BA0,1
DQ
Self-Refresh Entry
Self-Refresh Exit
Before Self-Refresh Entry,
all banks must be idle state.
ACT#0
After tRC from Self-Refresh Exit,
all banks are idle state.
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
46
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
DQM Write Mask @BL=4
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
/RAS
tRCD
/CAS
/WE
CKE
DQM
A0-8
X
A10
X
A9,11
X
BA0,1
0
Y
Y
Y
0
0
0
masked
masked
D0
DQ
ACT#0
D0
WRITE#0
D0
D0
D0
WRITE#0
D0
D0
WRITE#0
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
47
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
DQM Read Mask @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
/RAS
tRCD
/CAS
/WE
CKE
DQM read latency=2
DQM
A0-8
X
A10
X
A9,11
X
BA0,1
0
Y
Y
Y
0
0
0
masked
Q0
DQ
ACT#0
READ#0
Q0
Q0
READ#0
Q0
masked
Q0
Q0
Q0
READ#0
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
48
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Power Down
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
/RAS
/CAS
/WE
Standby Power Down
CKE
Active Power Down
CKE latency=1
DQM
A0-8
X
A10
X
A9,11
X
BA0,1
0
DQ
Precharge All
ACT#0
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
49
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
CLK Suspend @BL=4 CL=3
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
CLK
/CS
/RAS
tRCD
/CAS
/WE
CKE
CKE latency=1
CKE latency=1
DQM
A0-8
X
A10
X
A9,11
X
BA0,1
0
DQ
Y
Y
0
0
D0
ACT#0
D0
D0
D0
WRITE#0
CLK suspended
Q0
Q0
Q0
Q0
READ#0
CLK suspended
Italic parameter indicates minimum case
MITSUBISHI ELECTRIC
50
128M Synchronous DRAM
SDRAM (Rev. 1.0E)
(4-BANK x 8,388,608-WORD x 4-BIT)
Nov. '99
(4-BANK x 4,194,304-WORD x 8-BIT)
M2V28S20ATP -6,-6L,-7,-7L,-8,-8L
M2V28S30ATP -6,-6L,-7,-7L,-8,-8L
MITSUBISHI LSIs M2V28S40ATP -6,-6L,-7,-7L,-8,-8L
(4-BANK x 2,097,152-WORD x 16-BIT)
Keep safety first in your circuit designs!
Mitsubishi Electric Corporation puts the maximum effort into making semiconductor
products better and more reliable, but there is always the possibility that trouble may occur
with them. Trouble with semiconductors may lead to personal injury, fire or property
damage. Remember to give due consideration to safety when making your circuit designs,
with appropriate measures such as (i) placement of substitutive, auxiliary circuits, (ii) use of
non-flammable material or (iii) prevention against any malfunction or mishap.
Notes regarding these materials
1. These materials are intended as a reference to assist our customers in the selection of the Mitsubishi
semiconductor product best suited to the customer's application; they do not convey any license under
any intellectual property rights, or any other rights, belonging to Mitsubishi Electric Corporation or a third
party.
2. Mitsubishi Electric Corporation assumes no responsibility for any damage, or infringement of any thirdparty's rights, originating in the use of any product data, diagrams, charts, programs, algorithms, or circuit
application examples contained in these materials.
3. All information contained in these materials, including product data, diagrams, charts, programs and
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subject to change by Mitsubishi Electric Corporation without notice due to product improvements or other
reasons. It is therefore recommended that customers contact Mitsubishi Electric Corporation or an
authorized Mitsubishi Semiconductor product distributor for the latest product information before
purchasing a product listed herein.
The information described here may contain technical inaccuracies or typographical errors. Mitsubishi
Electric Corporation assumes no responsibility for any damage, liability, or other loss rising from these
inaccuracies or errors.
Please also pay attention to information published by Mitsubishi Electric Corporation by various means,
including the Mitsubishi Semiconductor home page (http://www.mitsubishichips.com).
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charts, programs, and algorithms, please be sure to evaluate all information as a total system before
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5. Mitsubishi Electric Corporation semiconductors are not designed or manufactured for use in a device or
system that is used under circumstances in which human life is potentially at stake. Please contact
Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product distributor when
considering the use of a product contained herein for any specific purposes, such as apparatus or
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6. The prior written approval of Mitsubishi Electric Corporation is necessary to reprint or reproduce in whole
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Any diversion or reexport contrary to the export control laws and regulations of Japan and/or the country
of destination is prohibited.
8. Please contact Mitsubishi Electric Corporation or an authorized Mitsubishi Semiconductor product
distributor for further details on these materials or the products contained therein.
MITSUBISHI ELECTRIC
51