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CYDC256B16, CYDC128B16,
CYDC064B16, CYDC128B08,
CYDC064B08
Document #: 001-01638 Rev. *E Page 16 of 26
Interrupt Timing
[33]
t
INS
INT Set Time 35 45 ns
t
INR
INT Reset Time 35 45 ns
Semaphore Timing
t
SOP
SEM Flag Update Pulse (OE or SEM)10 15 ns
t
SWRD
SEM Flag Write to Read Time 10 10 ns
t
SPS
SEM Flag Contention Window 10 10 ns
t
SAA
SEM Address Access Time 40 55 ns
Switching Characteristics for V
CC
= 3.0V Over the Operating Range
Parameter Description
CYDC256B16,
CYDC128B16,
CYDC064B16,
CYDC128B08,
CYDC064B08
CYDC256B16,
CYDC128B16,
CYDC064B16,
CYDC128B08,
CYDC064B08 Unit
-40 -55
Min. Max. Min. Max.
Read Cycle
t
RC
Read Cycle Time 40 55 ns
t
AA
Address to Data Valid 40 55 ns
t
OHA
Output Hold From Address Change 5 5 ns
t
ACE
[28]
CE LOW to Data Valid 40 55 ns
t
DOE
OE LOW to Data Valid 25 30 ns
t
LZOE
[29, 30, 31]
OE Low to Low Z 1 1 ns
t
HZOE
[29, 30, 31]
OE HIGH to High Z 15 15 ns
t
LZCE
[29, 30, 31]
CE LOW to Low Z 1 1 ns
t
HZCE
[29, 30, 31]
CE HIGH to High Z 15 15 ns
t
PU
[31]
CE LOW to Power-Up 0 0 ns
t
PD
[31]
CE HIGH to Power-Down 40 55 ns
t
ABE
[28]
Byte Enable Access Time 40 55 ns
Write Cycle
t
WC
Write Cycle Time 40 55 ns
t
SCE
[28]
CE LOW to Write End 30 45 ns
t
AW
Address Valid to Write End 30 45 ns
t
HA
Address Hold From Write End 0 0 ns
t
SA
[28]
Address Set-up to Write Start 0 0 ns
t
PWE
Write Pulse Width 25 40 ns
t
SD
Data Set-up to Write End 20 30 ns
t
HD
Data Hold From Write End 0 0 ns
Switching Characteristics for V
CC
= 2.5V Over the Operating Range (continued)
Parameter Description
CYDC256B16,
CYDC128B16,
CYDC064B16,
CYDC128B08,
CYDC064B08
CYDC256B16,
CYDC128B16,
CYDC064B16,
CYDC128B08,
CYDC064B08
Unit
-40 -55
Min. Max. Min. Max.
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