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