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參數(shù)資料
| 型號： | IDT7026L55JB |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | DRAM |
| 英文描述： | HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM |
| 中文描述： | 16K X 16 DUAL-PORT SRAM, 55 ns, PQCC84 |
| 封裝： | PLASTIC, LCC-84 |
| 文件頁數(shù)： | 14/18頁 |
| 文件大?。?/td> | 239K |
| 代理商： | IDT7026L55JB |
6.17
14
IDT7026S/L
HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM
MILITARY AND COMMERCIAL TEMPERATURE RANGES
WAVEFORM OF BUSY ARBITRATION CONTROLLED BY
CE
TIMING
(M/
S
= V
IH
)
(1)
WAVEFORM OF BUSY ARBITRATION CYCLE CONTROLLED BY ADDRESS MATCH TIMING
(M/
S
= V
IH
)
(1)
2939 drw 15
ADDR
"A"
and
"B"
ADDRESSES MATCH
CE
"A"
CE
"B"
BUSY
"B"
t
APS
t
BAC
t
BDC
(2)
2939 drw 15
ADDR
"A"
ADDRESS "N"
ADDR
"B"
BUSY
"B"
t
APS
t
BAA
t
BDA
(2)
MATCHING ADDRESS "N"
NOTES:
1. All timing is the same for left and right ports. Port “A” may be either the left or right port. Port “B” is the port opposite from “A”.
2. If t
APS
is not satisfied, the busy signal will be asserted on one side or another but there is no guarantee on which side busy will be asserted.
TRUTH TABLE III — EXAMPLE OF SEMAPHORE PROCUREMENT SEQUENCE
(1,2)
Functions
D
0
- D
15
Left
No Action
1
Left Port Writes "0" to Semaphore
0
Right Port Writes "0" to Semaphore
0
Left Port Writes "1" to Semaphore
1
Left Port Writes "0" to Semaphore
1
Right Port Writes "1" to Semaphore
0
Left Port Writes "1" to Semaphore
1
Right Port Writes "0" to Semaphore
1
Right Port Writes "1" to Semaphore
1
Left Port Writes "0" to Semaphore
0
Left Port Writes "1" to Semaphore
1
D
0
- D
15
Right
Status
1
1
1
0
0
1
1
0
1
1
1
Semaphore free
Left port has semaphore token
No change. Right side has no write access to semaphore
Right port obtains semaphore token
No change. Left port has no write access to semaphore
Left port obtains semaphore token
Semaphore free
Right port has semaphore token
Semaphore free
Left port has semaphore token
Semaphore free
NOTES:
1. This table denotes a sequence of events for only one of the eight semaphores on the IDT7026.
2. There are eight semaphore flags written to via I/O
0
and read from all I/O's (I/O
0
-I/O
15
). These eight semaphores are addressed by A
0
- A
2
.
2683 tbl 16
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| IDT7026S20J | 功能描述:IC SRAM 256KBIT 20NS 84PLCC RoHS:否 類別:集成電路 (IC) >> 存儲器 系列:- 標(biāo)準(zhǔn)包裝:1,000 系列:- 格式 - 存儲器:RAM 存儲器類型:SRAM - 雙端口，同步 存儲容量:1.125M（32K x 36） 速度:5ns 接口:并聯(lián) 電源電壓:3.15 V ~ 3.45 V 工作溫度:-40°C ~ 85°C 封裝/外殼:256-LBGA 供應(yīng)商設(shè)備封裝:256-CABGA（17x17） 包裝:帶卷 (TR) 其它名稱:70V3579S5BCI8 |
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