參數(shù)資料
型號: HB28A896IA1
元件分類: PROM
英文描述: 448M X 16 FLASH 5V PROM CARD, XMA68
封裝: CARD-68
文件頁數(shù): 29/47頁
文件大?。?/td> 146K
代理商: HB28A896IA1
HB28A896IA1, HB28A512IA1
35
Ultra DMA Mode Access AC Characteristics
Mode0
Mode1
Mode2
Mode3
Mode4
Parameter
Symbol Min Max Min Max Min Max Min Max Min Max Unit
Cycle time allowing for asymmetry and
clock variations
t
CYC
112 —73—54—39—25—ns
Two cycle time allowing for clock
variations
t
2CYC
230 —154 —115 —86—57—ns
Data setup time at recipient
t
DS
15—10—7
—7
—5
—ns
Data hold time at recipient
t
DH
5—
ns
Data valid setup at sender
t
DVS
70—48—30—20—6
—ns
Data valid hold at sender
t
DVH
6—
ns
First STROBE time*
2
t
FS
0
230 0
200 0
170 0
130 0
120 ns
Limited interlock time*
3
t
LI
0
150 0
100 0
100 ns
Interlock time with minimum
t
MLI
20—20—20—20—20—ns
Unlimited interlock time
t
UI
0—
ns
Maximum time allowed for output
drivers to release
t
AZ
—10
10
—10
10
—10
ns
Minimum delay time required for
output
t
ZAH
20—20—20—20—20—ns
Drivers to assert or negate
t
ZAD
0—
ns
Envelope time
t
ENV
20
70
20
70
20
70
20
55
20
55
ns
STROBE–to–DMARDY time
t
SR
50
30
20
NA*
1 —NA*1 ns
Ready-to-final STROBE time
t
RFS
—75
70
—60
60
—60
ns
Minimum time to assert STOP or
negate DMARQ
t
RP
160 —
125 —
100 —
ns
Setup and hold times for DMACK
t
ACK
20—20—20—20—20—ns
Time from STROBE edge to negation
of DMARQ or assertion of STOP
t
SS
50—50—50—50—50—ns
Note:
1. NA = Not Available
2. When Ultra DMA data-in burst termination is occured before command completion and then the
host resumes Ultra DMA data-in burst, the Fast STROBE time may be longer than t
FS.
3. When Ultra DMA data-out burst termination is occured before command completion and then the
host resumes Ultra DMA data-out burst, the STOP–to–DMARDY time may be longer than t
LI.
4. All timing measurement switching points (low to high and high to low) is taken at 1.5 V.
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