參數(shù)資料
型號(hào): IDT7026S35J
廠(chǎng)商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類(lèi): DRAM
英文描述: HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM
中文描述: 16K X 16 DUAL-PORT SRAM, 35 ns, PQCC84
封裝: PLASTIC, LCC-84
文件頁(yè)數(shù): 14/18頁(yè)
文件大?。?/td> 239K
代理商: IDT7026S35J
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
相關(guān)PDF資料
PDF描述
IDT7026S35JB HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM
IDT7026S55G HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM
IDT7026S55GB HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM
IDT7026S55J HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM
IDT7026L HIGH-SPEED 16K x 16 DUAL-PORT STATIC RAM
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