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| 型號(hào)： | CYDC064B08-55AXI |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | DRAM |
| 英文描述： | 1.8V 4k/8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port Static RAM |
| 中文描述： | 8K X 8 DUAL-PORT SRAM, 55 ns, PQFP100 |
| 封裝： | 14 X 14 MM, 1.40 MM HEIGHT, LEAD FREE, PLASTIC, TQFP-100 |
| 文件頁(yè)數(shù)： | 7/26頁(yè) |
| 文件大?。?/td> | 580K |
| 代理商： | CYDC064B08-55AXI |
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CYDC256B16, CYDC128B16,
CYDC064B16, CYDC128B08,
CYDC064B08
Document #: 001-01638 Rev. *E
Page 7 of 26
When reading a semaphore, all sixteen/eight data lines output
the semaphore value. The read value is latched in an output
register to prevent the semaphore from changing state during
a write from the other port. If both ports attempt to access the
semaphore within t
SPS
of each other, the semaphore will
definitely be obtained by one side or the other, but there is no
guarantee which side will control the semaphore. On
power-up, both ports should write “1” to all eight semaphores.
Architecture
The
CYDC128B08, CYDC064B08 consist of an array of 4k, 8k, or
16k words of 16 dual-port RAM cells, I/O and address lines,
and control signals (CE, OE, R/W). The CYDC064B08 and
CYDC256B16,
CYDC128B16,
CYDC064B16,
CYDC128B08 consist of an array of 8k and 16k words of 8
each of dual-port RAM cells, I/O and address lines, and control
signals (CE, OE, R/W).These control pins permit independent
access for reads or writes to any location in memory. To handle
simultaneous writes/reads to the same location, a BUSY pin is
provided on each port. Two Interrupt (INT) pins can be utilized
for port-to-port communication. Two Semaphore (SEM)
control pins are used for allocating shared resources. With the
M/S pin, the devices can function as a master (BUSY pins are
outputs) or as a slave (BUSY pins are inputs). The devices
also have an automatic power-down feature controlled by CE.
Each port is provided with its own output enable control (OE),
which allows data to be read from the device.
Notes:
11.This column applies to x16 devices only.
12.See Interrupts Functional Description for specific highest memory locations by device.
13.If BUSY
R
= L, then no change.
14.If BUSY
= L, then no change.
15.See Functional Description for specific addresses by device.
Table 1. Non-Contending Read/Write
Inputs
Outputs
Operation
CE
R/W
OE
UB
LB
SEM
I/O
8
–
I/O
15
[11]
High Z
I/O
0
–
I/O
7
High Z
H
X
X
X
X
H
Deselected: Power-down
X
X
X
H
H
H
High Z
High Z
Deselected: Power-down
L
L
X
L
H
H
Data In
High Z
Write to Upper Byte Only
L
L
X
H
L
H
High Z
Data In
Write to Lower Byte Only
L
L
X
L
L
H
Data In
Data In
Write to Both Bytes
L
H
L
L
H
H
Data Out
High Z
Read Upper Byte Only
L
H
L
H
L
H
High Z
Data Out
Read Lower Byte Only
L
H
L
L
L
H
Data Out
Data Out
Read Both Bytes
X
X
H
X
X
X
High Z
High Z
Outputs Disabled
H
H
L
X
X
L
Data Out
Data Out
Read Data in Semaphore Flag
X
H
L
H
H
L
Data Out
Data Out
Read Data in Semaphore Flag
H
X
X
X
L
Data In
Data In
Write D
IN0
into Semaphore Flag
X
X
H
H
L
Data In
Data In
Write D
IN0
into Semaphore Flag
L
X
X
L
X
L
Not Allowed
L
X
X
X
L
L
Not Allowed
Table 2. Interrupt Operation Example (Assumes BUSY
L
= BUSY
R
= HIGH)
[12]
Function
Left Port
Right Port
R/W
L
L
CE
L
L
OE
L
X
A
0L–13L
3FFF
[15]
INT
L
X
R/W
R
X
CE
R
X
OE
R
X
A
0R–13R
X
3FFF
[15]
3FFE
[15]
INT
R
L
[14]
H
[13]
Set Right INT
R
Flag
Reset Right INT
R
Flag
Set Left INT
L
Flag
Reset Left INT
L
Flag
X
X
X
X
X
X
L
L
X
X
X
X
L
[13]
H
[14]
L
L
X
X
X
L
L
3FFE
[15]
X
X
X
X
X
[+] Feedback
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CYDC064B16 | Replacement for National Semiconductor part number DM9328N. Buy from authorized manufacturer Rochester Electronics. |
| CYDC064B16-40AXC | 1.8V 4k/8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port Static RAM |
| CYDC064B16-55AXC | Replacement for National Semiconductor part number DM9334J. Buy from authorized manufacturer Rochester Electronics. |
| CYDC064B16-55AXI | 1.8V 4k/8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port Static RAM |
| CYDC128B08 | 1.8V 4k/8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port Static RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CYDC064B16 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:1.8V 4k/8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port Static RAM |
| CYDC064B16-40AXC | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:1.8V 4k/8k/16k x 16 and 8k/16k x 8 ConsuMoBL Dual-Port Static RAM |
| CYDC064B16-55AXC | 制造商:Cypress Semiconductor 功能描述: |
| CYDC064B16-55AXI | 功能描述:靜態(tài)隨機(jī)存取存儲(chǔ)器 64K 4Kx16 Consumer Hi Vol Dual Port IND RoHS:否 制造商:Cypress Semiconductor 存儲(chǔ)容量:16 Mbit 組織:1 M x 16 訪問(wèn)時(shí)間:55 ns 電源電壓-最大:3.6 V 電源電壓-最小:2.2 V 最大工作電流:22 uA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSOP-48 封裝:Tray |
| CYDC1069AV33-10ZC | 制造商:Cypress Semiconductor 功能描述:MW |
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