HD6433045 HITACHI [Hitachi Semiconductor], HD6433045 Datasheet - Page 693

• Manufacturer Part Number: HD6433045
• Description: Hitachi Single-Chip Microcomputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

Table 21-13 Refresh Controller Bus Timing
Condition A: V
Condition C: V
Item
RAS delay time 1
RAS delay time 2
RAS delay time 3
Row address hold time*
RAS precharge time*
CAS to RAS precharge time*
CAS pulse width
RAS access time*
Address access time
CAS access time*
Write data setup time 3
CAS setup time*
Read strobe delay time
Note: At 8 MHz, the times below depend as indicated on the clock cycle time.
At 16 MHz, the times below depend as indicated on the clock cycle time.
t
t
t
t
t
t
RAH
RAC
RP
RAH
RAC
RP
= t
= t
V
specifications), T
V
specifications), T
= 0.5
= 2.0
= 0.5
= 2.0
CRP
CRP
CC
SS
CC
SS
= AV
= AV
= 2.7 V to 5.5 V, AV
= 5.0 V ± 10%, AV
= 1.0
= 1.0
t
t
t
t
CYC
CYC
CYC
CYC
SS
SS
– 38 (ns)
– 90 (ns)
– 17 (ns)
– 40 (ns)
= 0 V, ø = 1 MHz to 8 MHz, T
= 0 V, ø = 1 MHz to 16 MHz, T
t
t
CYC
CYC
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
RAD1
RAD2
RAD3
RAH
RP
CRP
CAS
RAC
AA
CAC
WDS3
CSR
RSD
a
a
– 40 (ns)
– 18 (ns)
= –40°C to +85°C (wide-range specifications)
= –40°C to +85°C (wide-range specifications)
CC
CC
= 5.0 V ± 10%, V
Min
—
—
—
25
85
85
100
—
—
—
50
20
—
= 2.7 V to 5.5 V, V
Condition A
t
t
t
t
CAC
CSR
CAC
CSR
685
8 MHz
= 1.0
= 0.5
= 1.0
= 0.5
Max
60
60
60
—
—
—
—
160
105
50
—
—
60
t
t
t
t
a
CYC
CYC
CYC
CYC
a
= –20°C to +75°C (regular
REF
Min
—
—
—
15
45
45
40
—
—
—
15
15
—
= –20°C to +75°C (regular
– 75 (ns)
– 43 (ns)
– 33 (ns)
– 17 (ns)
REF
Condition C
= 4.5 V to AV
16 MHz
= 2.7 V to AV
Max
30
30
30
—
—
—
—
85
55
30
—
—
30
Unit
ns
CC
CC
,
,
Test
Conditions
Figure 21-10
to
Figure 21-16