478
Table 20.6
Bus Timing (1) (cont)
Conditions: V
CC
= 5.0 V ±10%, AV
CC
= 5.0 V ±10%,AV
CC
= V
CC
±10%, AV
ref
= 4.5 V to
AV
CC
, V
SS
= AV
SS
= 0 V,
φ
= 20 MHz, Ta = –20 to +75°C*
Note: * Regular-specification products; for wide-temperature-range products, Ta = –40 to +85°C
Item
Symbol
Min
Max
Unit
Figures
Write data hold time
t
WDH
0
—
ns
20.9, 20.11–20.14
Parity output delay time 1
t
WPDD1
—
40
ns
20.9, 20.13, 20.14
Parity output delay time 2
t
WPDD2
—
20
ns
20.11, 20.12
Parity output hold time
t
WPDH
0
—
ns
20.9, 20.11–20.14
Wait setup time
t
WTS
14
—
ns
20.10, 20.15, 20.19
Wait hold time
t
WTH
10
—
ns
Read data access time 1
*
6
t
ACC1
t
cyc
– 30
*
4
—
ns
20.8, 20.11, 20.12
Read data access time 2
*
6
t
ACC2
t
cyc
×
(n+2) –
30
*
3
—
ns
20.9, 20.10,
20.13–20.15
RAS
delay time 1
t
RASD1
—
20
ns
20.11–20.14,
RAS
delay time 2
t
RASD2
—
30
ns
20.16–20.18
CAS
delay time 1
t
CASD1
—
20
ns
20.11
CAS
delay time 2
*
7
t
CASD2
—
20
ns
20.13, 20.14,
CAS
delay time 3
*
7
t
CASD3
—
20
ns
20.16–20.18
Column address setup time
t
ASC
0
—
ns
20.11, 20.12
Read data access
time from
CAS
1
*
6
35% duty
*
2
t
CAC1
t
cyc
×
0.65 –
19
—
ns
50% duty
t
cyc
×
0.5 – 19 —
ns
Read data access time from
CAS
2
*
6
t
CAC2
t
cyc
×
(n+1) –
25
*
3
—
ns
20.13–20.15
Read data access time from
RAS
1
*
6
t
RAC1
t
cyc
×
1.5 – 20 —
ns
20.11, 20.12
Read data access time from
RAS
2
*
6
t
RAC2
t
cyc
×
(n+2.5)
– 20
*
3
—
ns
20.13–20.15
High-speed page mode
CAS
precharge time
t
CP
t
cyc
×
0.25
—
ns
20.12
Содержание HD6417032
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Страница 525: ...490 CK RAS CAS TRp TRc TRcc tRASD1 tRASD2 tCASD3 tCASD2 TRr tCSR Figure 20 18 Self Refresh ...
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