A67P8318/A67P7336
Preliminary
Document Title
256K X 18, 128K X 36 LVTTL, Pipelined ZeBL
TM
SRAM
Revision History
Rev. No.
0.0
256K X 18, 128K X 36 LVTTL, Pipelined ZeBL
TM
SRAM
History
Initial issue
Issue Date
July 13, 2005
Remark
Preliminary
PRELIMINARY
(July, 2005, Version 0.0)
AMIC Technology, Corp.
A67P8318/A67P7336
Preliminary
Features
Fast access time:
2.6/2.8/3.2/3.5/3.8/4.2 (250/227/200/166/150/133MHz)
Zero Bus Latency between READ and WRITE cycles
allows 100% bus utilization
Signal +2.5V
±
5% power supply
Individual Byte Write control capability
Clock enable (
CEN
) pin to enable clock and suspend
operations
Clock-controlled and registered address, data and
control signals
Registered output for pipelined applications
Three separate chip enables allow wide range of
options for CE control, address pipelining
Internally self-timed write cycle
Selectable BURST mode (Linear or Interleaved)
SLEEP mode (ZZ pin) provided
Available in 100 pin LQFP package
256K X 18, 128K X 36 LVTTL, Pipelined ZeBL
TM
SRAM
General Description
The AMIC Zero Bus Latency (ZeBL
TM
) SRAM family
employs high-speed, low-power CMOS designs using an
advanced CMOS process.
The A67P8318, A67P7336 SRAMs integrate a 256K X 18,
128K X 36 SRAM core with advanced synchronous
peripheral circuitry and a 2-bit burst counter. These SRAMs
are optimized for 100 percent bus utilization without the
insertion of any wait cycles during Write-Read alternation.
The positive edge triggered single clock input (CLK) controls
all synchronous inputs passing through the registers. The
synchronous inputs include all address, all data inputs,
active low chip enable (
CE
), two additional chip enables for
easy depth expansion (CE2,
CE2
), cycle start input
(ADV/
LD
), synchronous clock enable (
CEN
), byte write
enables (
BW1
,
BW2
,
BW3
,
BW4
) and read/write (R/
W
).
Asynchronous inputs include the output enable (
OE
), clock
(CLK), SLEEP mode (ZZ, tied LOW if unused) and burst
mode (MODE). Burst Mode can provide either interleaved or
linear operation, burst operation can be initiated by
synchronous address Advance/Load (ADV/
LD
) pin in Low
state. Subsequent burst address can be internally
generated by the chip and controlled by the same input pin
ADV/
LD
in High state.
Write cycles are internally self-time and synchronous with
the rising edge of the clock input and when R/
W
is Low.
The feature simplified the write interface. Individual Byte
enables allow individual bytes to be written.
BW1
controls
I/Oa pins;
BW2
controls I/Ob pins;
BW3
controls I/Oc pins;
and
BW4
controls I/Od pins. Cycle types can only be
defined when an address is loaded.
The SRAM operates from a +2.5V power supply, and all
inputs and outputs are LVTTL-compatible. The device is
ideally suited for high bandwidth utilization systems.
PRELIMINARY (July, 2005, Version 0.0)
2
AMIC Technology, Corp.
A67P8318/A67P7336
Pin Configuration
OE
ADV/
LD
BW4
BW3
BW2
BW1
CEN
VCC
VSS
CE2
CE2
CLK
R/W
128Kx36
CE
A6
A7
NC
NC
A8
A8
82
BW2
BW1
VCC
CEN
VSS
CE2
CLK
CE2
R/W
NC
CE
NC
NC
NC
A6
A7
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
I/Oc
8
I/Oc
0
I/Oc
1
VCCQ
VSSQ
I/Oc
2
I/Oc
3
I/Oc
4
I/Oc
5
VSSQ
VCCQ
I/Oc
6
I/Oc
7
VCC
VCC
VCC
VSS
I/Od
0
I/Od
1
VCCQ
VSSQ
I/Od
2
I/Od
3
I/Od
4
I/Od
5
VSSQ
VCCQ
I/Od
6
I/Od
7
I/Od
8
NC
NC
NC
VCCQ
VSSQ
NC
NC
I/Ob
8
I/Ob
7
VSSQ
VCCQ
I/Ob
6
I/Ob
5
VCC
VCC
VCC
VSS
I/Ob
4
I/Ob
3
VCCQ
VSSQ
I/Ob
2
I/Ob
1
I/Ob
0
NC
VSSQ
VCCQ
NC
NC
NC
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
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
100
81
A9
256Kx18
OE
ADV/
LD
A9
80
79
78
77
76
75
74
73
72
71
70
69
A10
NC
NC
VCCQ
VSSQ
NC
I/Oa
0
I/Oa
1
I/Oa
2
VSSQ
VCCQ
I/Oa
3
I/Oa
4
VSS
VCC
VCC
ZZ
I/Oa
5
I/Oa
6
VCCQ
VSSQ
I/Oa
7
I/Oa
8
NC
NC
VSSQ
VCCQ
NC
NC
NC
I/Ob
8
I/Ob
7
I/Ob
6
VCCQ
VSSQ
I/Ob
5
I/Ob
4
I/Ob
3
I/Ob
2
VSSQ
VCCQ
I/Ob
1
I/Ob
0
VSS
VCC
VCC
ZZ
I/Oa
7
I/Oa
6
VCCQ
VSSQ
I/Oa
5
I/Oa
4
I/Oa
3
I/Oa
2
VSSQ
VCCQ
I/Oa
1
I/Oa
0
I/Oa
8
A67P8318E
A67P7336E
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
MODE MODE
A5
A4
A3
A2
A1
A0
A11
A12
A13
A14
A15
A16
A15
VCC
VSS
A10
A1
A11
A12
A13
A14
VSS
VCC
A16
A5
A4
A3
A2
A0
NC
NC
NC
NC
A17
NC
NC
NC
NC
PRELIMINARY (July, 2005, Version 0.0)
3
AMIC Technology, Corp.
A67P8318/A67P7336
Block Diagram (128K X 36)
ZZ
MODE
MODE
LOGIC
ADV/LD
CEN
CLK
CLK
LOGIC
BURST
LOGIC
ADDRESS
COUNTER
CLR
A0-A16
ADDRESS
REGISTERS
WRITE
ADDRESS
REGISTER
WRITE
ADDRESS
REGISTER
9
BYTEa
WRITE
DRIVER
BYTEb
WRITE
DRIVER
BYTEc
WRITE
DRIVER
BYTEd
WRITE
DRIVER
9
9
ADV/LD
R/W
BW1
BW2
BW3
BW4
WRITE
REGISTRY
&
CONTROL
LOGIC
9
128Kx9x4
MEMORY
SENSE
AMPS
9
9
ARRAY
OUTPUT
REGISTERS
&
OUTPUT
BUFFERS
I/O
s
9
9
DATA-IN
REGISTERS
DATA-IN
REGISTERS
CE
CE2
CE2
CHIP
ENABLE
LOGIC
PIPELINED
ENABLE
LOGIC
OUTPUT
ENABLE
LOGIC
OE
PRELIMINARY
(July, 2005, Version 0.0)
4
AMIC Technology, Corp.
A67P8318/A67P7336
Block Diagram (256K X 18)
ZZ
MODE
MODE
LOGIC
ADV/LD
CEN
CLK
CLK
LOGIC
BURST
LOGIC
ADDRESS
COUNTER
CLR
A0-A17
ADDRESS
REGISTERS
WRITE
ADDRESS
REGISTER
WRITE
ADDRESS
REGISTER
9
WRITE
REGISTRY
&
CONTROL
LOGIC
ADV/LD
R/W
BW1
BW2
BYTEa
WRITE
DRIVER
9
256KX9X2
MEMORY
SENSE
AMPS
OUTPUT
REGISTERS
&
OUTPUT
BUFFERS
I/O
S
9
BYTEb
WRITE
DRIVER
9
ARRAY
DATA-IN
REGISTERS
DATA-IN
REGISTERS
CE
CE2
CE2
CHIP
ENABLE
LOGIC
PIPELINED
ENABLE
LOGIC
OUTPUT
ENABLE
LOGIC
OE
PRELIMINARY
(July, 2005, Version 0.0)
5
AMIC Technology, Corp.
Linux与安卓
