HD64F3048VTF8 Datasheet, PDF (693/903 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip

Section 21 Electrical Characteristics
Table 21.6 Refresh Controller Bus Timing
Condition A: V_CC = 3.0 V to 3.6 V, AV_CC = 3.0 V to 3.6 V, V_REF = 3.0 V to AV_CC,
V_SS = AV_SS = 0 V, φ = 2 MHz to 25 MHz, T_a = –20°C to +75°C (regular
specifications), T_a = –40°C to +85°C (wide-range specifications)
Condition B: V_CC = 5.0 V ±10%, AV_CC = 5.0 V ±10%, V_REF = 4.5 V to AV_CC,
V_SS = AV_SS = 0 V, φ = 2 MHz to 25 MHz, T_a = –20°C to +75°C (regular
specifications), T_a = –40°C to +85°C (wide-range specifications)
Condition A
25 MHz
Item
RAS delay time 1^*1
RAS delay time 2^*1
RAS delay time 3^*1
Row address hold time
RAS precharge time^*1
CAS to RAS precharge
time^{*1 *2}
CAS pulse width^*2
RAS access time^*1
Address access time
CAS access time^*2
Write data setup time 3
CAS setup time^*2
Read strobe delay time
Signal rise time (all input
pins except EXTAL)
Symbol
t_RAD1
t_RAD2
t_RAD3
t_RAH
t_RP
t_CRP
Min
—
—
—
0.5t_cyc –5
1.0t_cyc –15
1.0t_cyc –15
Max
20
20
20
—
—
—
t_CAS
t_RAC
t_AA
t_CAC
t_WDS3
t_CSR
t_RSD
t_SR
1.0t_cyc –18
—
—
—
1.0t_cyc –25
0.5t_cyc –15
—
—
—
2.0t_cyc –35
1.5t_cyc –40
1.0t_cyc –30
—
—
25
100
Signal fall time (all input t_SF
—
100
pins except EXTAL)
Notes: 1. The RAS pin is assigned to the CS3 pin.
2. The CAS pin is assigned to the RD pin.
Condition B
25 MHz
Min
Max
—
18
—
18
—
18
0.5t_cyc –5 —
1.0t_cyc –15 —
1.0t_cyc –15 —
Test
Unit Conditions
ns Figure 21.10
to
Figure 21.16
1.0t_cyc –18
—
—
—
1.0t_cyc –25
0.5t_cyc –15
—
—
2.0t_cyc –35
1.5t_cyc –40
1.0t_cyc –30
—
—
25
—
100
ns
Figure 21.18
—
100
Rev. 3.00 Sep 27, 2006 page 665 of 872
REJ09B0325-0300