High-Speed 256K x 18 Synchronous Bank-Switchable Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Description:
The IDT70V7319 is a high-speed 256Kx18 (4Mbit) synchronous
Bank-Switchable Dual-Ported SRAM organized into 64 independent
4Kx18 banks. The device has two independent ports with separate
control, address, and I/O pins for each port, allowing each port to access
any 4Kx18 memory block not alReady accessed by the other port.
Accesses by the ports into specific banks are controlled via the bank
address pins under the user's direct control.
Registers on control, data, and address inputs provide minimal setup
and hold times. The timing latitude provided by this approach allows
systems to be designed with very short cycle times. With an input data
register, the IDT70V7319 has been optimized for applications having
unidirectional or bidirectional data flow in bursts. An automatic power down
feature, controlled by CE
0
and CE
1
, permits the on-chip circuitry of each
port to enter a very low standby power mode. The dual chip enables also
facilitate depth expansion.
The 70V7319 can support an operating voltage of either 3.3V or 2.5V
on one or both ports, controllable by the OPT pins. The power supply for
the core of the device(V
DD
) remains at 3.3V. Please refer also to the
functional description on page 18.
Pin Configuration
(1,2,3,4)
11/20/01
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
IO
9L
B1
NC
B2
V
SS
B3
TDO
B4
NC
B5
BA
4L
B6
BA
0L
B7
A
8L
B8
NC
B9
V
DD
B10
CLK
L
CNTEN
L
A
4L
B11
B12
B13
A
0L
B14
OPT
L
B15
NC
B16
V
SS
B17
NC
C1
V
SS
C2
NC
C3
TDI
C4
BA
5L
C5
BA
1L
C6
A
9L
C7
NC
C8
CE
0L
C9
V
SS
C10
ADS
L
C11
A
5L
C12
A
1L
C13
V
SS
C14
V
DDQR
I/O
8L
C15
C16
NC
C17
V
DDQL
I/O
9R
V
DDQR
PL/
FT
L
D1
D2
D3
D4
NC
D5
BA
2L
D6
A
10L
D7
UB
L
D8
CE
1L
D9
V
SS
D10
R/W
L
D11
A
6L
D12
A
2L
D13
V
DD
D14
I/O
8R
D15
NC
D16
V
SS
D17
NC
E1
V
SS
E2
I/O
10L
E3
NC
E4
BA
3L
A
11L
A
7L
LB
L
V
DD
OE
L
REPEAT
L
A
3L
V
DD
NC
E14
V
DDQL
I/O
7L
E15
E16
I/O
7R
E17
I/O
11L
F1
NC
F2
V
DDQR
I/O
10R
F3
F4
I/O
6L
F14
NC
F15
V
SS
F16
NC
F17
V
DDQL
I/O
11R
G1
G2
NC
G3
V
SS
G4
V
SS
G14
I/O
6R
G15
NC
G16
V
DDQR
G17
NC
H1
V
SS
H2
I/O
12L
H3
NC
H4
NC
V
DDQL
I/O
5L
H15
H16
NC
H17
V
DD
J1
NC
J2
V
DDQR
I/O
12R
J3
J4
70V7319BF
BF-208
(5)
208-Pin fpBGA
Top View
(6)
H14
V
DD
J14
NC
J15
V
SS
J16
I/O
5R
J17
V
DDQL
K1
V
DD
K2
V
SS
K3
V
SS
K4
V
SS
K14
V
DD
K15
V
SS
V
DDQR
K16
K17
I/O
14R
L1
V
SS
L2
I/O
13R
L3
V
SS
L4
I/O
3R
V
DDQL
I/O
4R
L14
L15
L16
V
SS
L17
NC
M1
I/O
14L
V
DDQR
I/O
13L
M2
M3
M4
NC
M14
I/O
3L
M15
V
SS
M16
I/O
4L
M17
V
DDQL
N1
NC
N2
I/O
15R
N3
V
SS
N4
V
SS
N14
NC
N15
I/O
2R
V
DDQR
N16
N17
NC
P1
V
SS
P2
NC
P3
I/O
15L
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
I/O
1R
V
DDQL
P14
P15
NC
P16
I/O
2L
P17
I/O
16R
I/O
16L
V
DDQR
R1
R2
R3
NC
R4
TRST
BA
4R
BA
0R
R5
R6
R7
A
8R
R8
NC
R9
V
DD
R10
CLK
R
CNTEN
R
A
4R
R11
R12
R13
NC
R14
I/O
1L
R15
V
SS
R16
NC
R17
V
SS
T1
NC
T2
I/O
17R
TCK
T3
T4
BA
5R
BA
1R
T5
T6
A
9R
T7
NC
T8
CE
0R
T9
V
SS
T10
ADS
R
T11
A
5R
T12
A
1R
T13
V
SS
T14
V
DDQL
I/O
0R
V
DDQR
T15
T16
T17
NC
U1
I/O
17L
V
DDQL
TMS
U2
U3
U4
NC
U5
BA
2R
U6
A
10R
U7
UB
R
U8
CE
1R
U9
V
SS
U10
R/W
R
A
6R
U12
A
2R
U13
V
SS
U14
NC
U15
V
SS
U16
NC
U17
V
SS
NC
PL/
FT
R
NC
BA
3R
A
11R
A
7R
LB
R
V
DD
OE
R
A
3R
A
0R
V
DD
OPT
R
NC
I/O
0L
,
5629 drw 02c
NOTES:
1. All V
DD
pins must be connected to 3.3V power supply.
2. All V
DDQ
pins must be connected to appropriate power supply: 3.3V if OPT pin for that port is set to V
IH
(3.3V), and 2.5V if OPT pin for that port is
set to V
IL
(0V).
3. All V
SS
pins must be connected to ground supply.
4. Package body is approximately 15mm x 15mm x 1.4mm with 0.8mm ball pitch.
5. This package code is used to reference the package diagram.
6. This text does not indicate orientation of the actual part-marking.
6.42
2
IDT70V7319S
High-Speed 256K x 18 Synchronous Bank-Switchable Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Pin Configuration
(1,2,3,4)
(con't.)
70V7319BC
BC-256
(5)
256-Pin BGA
Top View
(6)
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
11/20/01
NC
B1
TDI
B2
NC
B3
BA
5L
B4
BA
2L
B5
A
11L
B6
A
8L
B7
NC
B8
CE
1L
B9
OE
L
B10
CNTEN
L
B11
A
5L
B12
A
2L
B13
A
0L
B14
NC
B15
NC
B16
NC
C1
NC
C2
TDO
C3
NC
C4
BA
3L
C5
BA
0L
C6
A
9L
C7
UB
L
C8
CE
0L
R/W
L
REPEAT
L
C9
C10
C11
A
4L
C12
A
1L
C13
V
DD
C14
NC
C15
NC
C16
NC
D1
I/O
9L
D2
V
SS
D3
BA
4L
D4
BA
1L
D5
A
10L
D6
A
7L
D7
NC
D8
LB
L
D9
CLK
L
ADS
L
D10
D11
A
6L
D12
A
3L
D13
OPT
L
D14
NC
D15
I/O
8L
D16
NC
E1
I/O
9R
E2
NC
E3
PL/
FT
L
V
DDQL
V
DDQL
V
DDQR
V
DDQR
V
DDQL
V
DDQL
V
DDQR
V
DDQR
V
DD
E4
E5
E6
E7
E8
E9
E10
E11
E12
E13
NC
E14
NC
E15
I/O
8R
E16
I/O
10R
I/O
10L
F1
F2
NC
F3
V
DDQL
F4
V
DD
F5
V
DD
F6
V
SS
F7
V
SS
F8
V
SS
F9
V
SS
F10
V
DD
F11
V
DD
V
DDQR
F12
F13
NC
F14
I/O
7L
F15
I/O
7R
F16
I/O
11L
G1
NC
G2
I/O
11R
V
DDQL
G3
G4
V
DD
G5
V
SS
G6
V
SS
G7
V
SS
G8
V
SS
G9
V
SS
G10
V
SS
G11
V
DD
V
DDQR
I/O
6R
G12
G13
G14
NC
G15
I/O
6L
G16
NC
H1
NC
H2
I/O
12L
V
DDQR
H3
H4
V
SS
H5
V
SS
H6
V
SS
H7
V
SS
H8
V
SS
H9
V
SS
H10
V
SS
H11
V
SS
H12
V
DDQL
I/O
5L
H13
H14
NC
H15
NC
H16
NC
J1
I/O
12R
J2
J3
NC
V
DDQR
J4
V
SS
J5
V
SS
J6
V
SS
J7
V
SS
J8
V
SS
J9
V
SS
J10
V
SS
J11
V
SS
J12
V
DDQL
J13
NC
J14
NC
J15
I/O
5R
J16
I/O
13L
I/O
14R
I/O
13R
V
DDQL
K1
K2
K3
K4
V
SS
K5
V
SS
K6
V
SS
K7
V
SS
K8
V
SS
K9
V
SS
K10
V
SS
K11
V
SS
K12
V
DDQR
I/O
4R
I/O
3R
K13
K14
K15
I/O
4L
K16
NC
L1
NC
L2
I/O
14L
V
DDQL
L3
L4
V
SS
L5
V
SS
L6
V
SS
L7
V
SS
L8
V
SS
L9
V
SS
L10
V
SS
L11
V
SS
L12
V
DDQR
L13
NC
L14
NC
L15
I/O
3L
L16
I/O
15L
M1
NC
M2
I/O
15R
V
DDQR
M3
M4
V
DD
M5
V
SS
M6
V
SS
M7
V
SS
M8
V
SS
M9
V
SS
M10
V
SS
M11
V
DD
M12
V
DDQL
I/O
2L
M13
M14
NC
M15
I/O
2R
M16
I/O
16R
I/O
16L
N1
N2
NC
N3
V
DDQR
N4
V
DD
N5
V
DD
N6
V
SS
N7
V
SS
N8
V
SS
N9
V
SS
N10
V
DD
N11
V
DD
N12
V
DDQL
I/O
1R
N13
N14
I/O
1L
N15
NC
N16
NC
P1
I/O
17R
P2
NC
P3
PL/
FT
R
V
DDQR
V
DDQR
V
DDQL
V
DDQL
V
DDQR
V
DDQR
V
DDQL
V
DDQL
P4
P5
P6
P7
P8
P9
P10
P11
P12
V
DD
P13
NC
P14
I/O
0R
P15
NC
P16
NC
R1
I/O
17L
TMS
R2
R3
BA
4R
BA
1R
R4
R5
A
10R
R6
A
7R
R7
NC
R8
LB
R
R9
CLK
R
ADS
R
R10
R11
A
6R
R12
A
3R
R13
NC
R14
NC
R15
I/O
0L
R16
NC
T1
NC
T2
TRST
T3
NC
T4
BA
3R
BA
0R
T5
T6
A
9R
T7
UB
R
T8
CE
0R
R/W
R
REPEAT
R
T9
T10
T11
A
4R
T12
A
1R
T13
OPT
R
T14
NC
T15
NC
T16
,
NC
TCK
NC
BA
5R
BA
2R
A
11R
A
8R
NC
CE
1R
OE
R
CNTEN
R
A
5R
A
2R
A
0R
NC
NC
5629 drw 02d
NOTES:
1. All V
DD
pins must be connected to 3.3V power supply.
2. All V
DDQ
pins must be connected to appropriate power supply: 3.3V if OPT pin for that port is set to V
IH
(3.3V), and 2.5V if OPT pin for that port is
set to V
IL
(0V).
3. All V
SS
pins must be connected to ground supply.
4. Package body is approximately 17mm x 17mm x 1.4mm, with 1.0mm ball-pitch.
5. This package code is used to reference the package diagram.
6. This text does not indicate orientation of the actual part-marking.
,
6.42
3
IDT70V7319S
High-Speed 256K x 18 Synchronous Bank-Switchable Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Pin Names
Left Port
CE
0L
,
CE
1L
R/W
L
OE
L
BA
0L
- BA
5L
A
0L
- A
11L
I/O
0L
- I/O
17L
CLK
L
PL/FT
L
ADS
L
CNTEN
L
REPEAT
L
LB
L
,
UB
L
V
DDQL
OPT
L
V
DD
V
SS
TDI
TDO
TCK
TMS
TRST
Right Port
CE
0R
,
CE
1R
R/W
R
OE
R
BA
0R
- BA
5R
A
0R
- A
11R
I/O
0R
- I/O
17R
CLK
R
PL/FT
R
ADS
R
CNTEN
R
REPEAT
R
LB
R
,
UB
R
V
DDQR
OPT
R
Chip Enables
Read/Write Enable
Output Enable
Bank Address
(4)
Address
Data Input/Output
Clock
Pipeline/Flow-Through
Address Strobe Enable
Counter Enable
Counter Repeat
(3)
Byte Enables (9-bit bytes)
Power (I/O Bus) (3.3V or 2.5V)
(1)
Option for selecting V
DDQX
(1,2)
Power (3.3V)
(1)
Ground (0V)
Test Data Input
Test Data Output
Test Logic Clock (10MHz)
Test Mode Select
Reset (Initialize TAP Controller)
5629 tbl 01
Names
NOTES:
1. V
DD
, OPT
X
, and V
DDQX
must be set to appropriate operating levels prior to
applying inputs on the I/Os and controls for that port.
2. OPT
X
selects the operating voltage levels for the I/Os and controls on that port.
If OPT
X
is set to VIH (3.3V), then that port's I/Os and controls will operate at 3.3V
levels and V
DDQX
must be supplied at 3.3V. If OPT
X
is set to VIL (0V), then that
port's I/Os and address controls will operate at 2.5V levels and V
DDQX
must be
supplied at 2.5V. The OPT pins are independent of one another—both ports can
operate at 3.3V levels, both can operate at 2.5V levels, or either can operate
at 3.3V with the other at 2.5V.
3. When
REPEAT
X
is asserted, the counter will reset to the last valid address loaded
via
ADS
X
.
4. Accesses by the ports into specific banks are controlled by the bank address
pins under the user's direct control: each port can access any bank of memory
with the shared array that is not currently being accessed by the opposite port
(i.e., BA
0L
- BA
5L
≠
BA
0R
- BA
5R
). In the event that both ports try to access the
same bank at the same time, neither access will be valid, and data at the two
specific addresses targeted by the ports within that bank may be corrupted (in
the case that either or both ports are writing) or may result in invalid output (in
the case that both ports are trying to read).
6.42
4
IDT70V7319S
High-Speed 256K x 18 Synchronous Bank-Switchable Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Truth Table I—Read/Write and Enable Control
(1,2,3,4)
OE
3
X
X
X
X
X
X
L
L
L
H
CLK
↑
↑
↑
↑
↑
↑
↑
↑
↑
X
CE
0
H
X
L
L
L
L
L
L
L
X
CE
1
X
L
H
H
H
H
H
H
H
X
UB
X
X
H
H
L
L
H
L
L
X
LB
X
X
H
L
H
L
L
H
L
X
R/W
X
X
X
L
L
L
H
H
H
X
Upper Byte
I/O
9-17
High-Z
High-Z
High-Z
High-Z
D
IN
D
IN
High-Z
D
OUT
D
OUT
High-Z
Lower Byte
I/O
0-8
High-Z
High-Z
High-Z
D
IN
High-Z
D
IN
D
OUT
High-Z
D
OUT
High-Z
MODE
Deselected–Power Down
Deselected–Power Down
All Bytes Deselected
Write to Lower Byte Only
Write to Upper Byte Only
Write to both Bytes
Read Lower Byte Only
Read UpperByte Only
Read both Bytes
Outputs Disabled
5629 tbl 02
NOTES:
1. "H" = V
IH,
"L" = V
IL,
"X" = Don't Care.
2.
ADS, CNTEN, REPEAT
are set as appropriate for address access. Refer to Truth Table II for details.
3.
OE
is an asynchronous input signal.
4. It is possible to read or write any combination of bytes during a given access. A few representative samples have been illustrated here.
Truth Table II—Address and Address Counter Control
(1,2,7)
Address
An
X
X
X
Previous
Address
X
An
An + 1
X
Addr
Used
An
An + 1
An + 1
An
CLK
↑
↑
↑
↑
ADS
L
(4)
H
H
X
CNTEN
X
L
(5)
H
X
REPEAT
(6)
H
H
H
L
(4)
I/O
(3)
D
I/O
(n)
D
I/O
(n+1)
D
I/O
(n+1)
D
I/O
(0)
External Address Used
Counter Enabled—Internal Address generation
External Addre ss Blocked—Counter disabled (An + 1 reused)
Counter Set to last valid
ADS
load
5629 tbl 03
MODE
NOTES:
1. "H" = V
IH,
"L" = V
IL,
"X" = Don't Care.
2. Read and write operations are controlled by the appropriate setting of R/W,
CE
0
, CE
1
,
UB/LB
and
OE.
3. Outputs configured in flow-through output mode: if outputs are in pipelined mode the data out will be delayed by one cycle.
4.
ADS
and
REPEAT
are independent of all other memory control signals including
CE
0
, CE
1
and
UB/LB
5. The address counter advances if
CNTEN
= V
IL
on the rising edge of CLK, regardless of all other memory control signals including
CE
0
, CE
1
,
UB/LB.
6. When
REPEAT
is asserted, the counter will reset to the last valid address loaded via
ADS.
This value is not set at power-up: a known location should be loaded
via
ADS
during initialization if desired. Any subsequent
ADS
access during operations will update the
REPEAT
address location.
7. The counter includes bank address and internal address. The counter will advance across bank boundaries. For example, if the counter is in Bank 0, at address
FFFh, and is advanced one location, it will move to address 0h in Bank 1. By the same token, the counter at FFFh in Bank 63 will advance to 0h in Bank 0. Refer
to Timing Waveform of Counter Repeat, page 17. Care should be taken during operation to avoid having both counters point to the same bank (i.e., ensure BA
0L
- BA
5L
≠
BA
0R
- BA
5R
), as this condition will invalidate the access for both ports. Please refer to the functional description on page 18 for details.
聊聊、笑笑、闹闹
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
