參數(shù)資料
型號(hào): CYDM128B16
廠商: Cypress Semiconductor Corp.
英文描述: 1.8V 4K/8K/16K x 16 MoBL㈢ Dual-Port Static RAM
中文描述: 1.8 4K/8K/16K㈢× 16的MoBL雙端口靜態(tài)存儲(chǔ)器
文件頁數(shù): 19/25頁
文件大?。?/td> 583K
代理商: CYDM128B16
CYDM256B16
CYDM128B16
CYDM064B16
Document #: 001-00217 Rev. *E
Page 19 of 25
Semaphore Read After Write Timing, Either Side
[45, 46]
Timing Diagram of Semaphore Contention
[47, 48]
Notes:
45.If the CE or SEM LOW transition occurs simultaneously with or after the R/W LOW transition, the outputs remain in the high-impedance state.
46.CE = HIGH for the duration of the above timing (both write and read cycle).
47.I/O
0R
= I/O
= LOW (request semaphore); CE
= CE
= HIGH.
48.If t
SPS
is violated, the semaphore will definitely be obtained by one side or the other, but which side will get the semaphore is unpredictable.
Switching Waveforms
(continued)
t
SOP
t
SAA
VALID ADRESS
VALID ADRESS
t
HD
DATA
IN
VALID
t
OHA
t
AW
t
HA
t
ACE
t
SOP
t
SCE
t
SD
t
SA
t
PWE
t
SWRD
t
DOE
WRITE CYCLE
READ CYCLE
OE
R/W
I/O
0
SEM
A
0
–A
2
DATA
OUT
VALID
MATCH
t
SPS
MATCH
R/W
L
SEM
L
R/W
R
SEM
R
A
0L
–A
2L
A
0R
–A
2R
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