HD6413003RF Datasheet, PDF (550/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

Table 18-5 Refresh Controller Bus Timing
Condition A: V_CC = 2.7 V to 5.5 V, AV_CC = 2.7 V to 5.5 V, V_REF = 2.7 V to AV_CC,
V_SS = AV_SS = 0 V, ø = 2 MHz to 8 MHz, T_a = –20°C to +75°C (regular
specifications), T_a = –40°C to +85°C (wide-range specifications)
Condition B: V_CC = 3.0 V to 5.5 V, AV_CC = 3.0 V to 5.5 V, V_REF = 3.0 V to AV_CC,
V_SS = AV_SS = 0 V, ø = 2 MHz to 10 MHz, T_a = –20°C to +75°C (regular
specifications), T_a = –40°C to +85°C (wide-range specifications)
Condition C: 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, ø = 2 MHz to 16 MHz, T_a = –20°C to +75°C (regular
specifications), T_a = –40°C to +85°C (wide-range specifications)
Condition A Condition B Condition C
Item
RAS delay time 1
RAS delay time 2
RAS delay time 3
Symbol
tRAD1
tRAD2
tRAD3
8 MHz
Min Max
— 60
— 60
— 60
10 MHz
Min Max
— 50
— 50
— 50
16 MHz
Min Max
— 30
— 30
— 30
Unit
ns
Test
Conditions
Figure 18-7
to
Figure 18-13
Row address hold time* tRAH
25 — 20 — 15 —
RAS precharge time*
tRP
85 — 70 — 40 —
CAS to RAS precharge tCRP
time*
85 — 70 — 40 —
CAS pulse width
tCAS
110 — 85 — 40 —
RAS access time*
tRAC
— 160 — 150 — 85
Address access time
tAA
— 105 — 75 — 55
CAS access time
tCAC
— 50 — 50 — 25
Write data setup time 3 tWDS3 75 — 50 — 40 —
CAS setup time*
tCSR
20 — 15 — 15 —
Read strobe delay time tRSD
— 60 — 50 — 30
Note: At 8 MHz, the times below depend as indicated on the clock cycle time.
t_RAH = 0.5 × t_cyc – 38 (ns)
t_CAC = 1.0 × t_cyc – 75 (ns)
t_RAC = 2.0 × t_cyc – 90 (ns)
t_CSR = 0.5 × t_cyc – 43 (ns)
t_RP = t_CRP = 1.0 × t_cyc – 40 (ns)
At 10 MHz, the times below depend as indicated on the clock cycle time.
t_RAH = 0.5 × t_cyc – 30 (ns)
t_CAC = 1.0 × t_cyc – 50 (ns)
t_RAC = 2.0 × t_cyc – 50 (ns)
t_CSR = 0.5 × t_cyc – 35 (ns)
t_RP = t_CRP = 1.0 × t_cyc – 30 (ns)
At 16 MHz, the times below depend as indicated on the clock cycle time.
t_RAH = 0.5 × t_cyc – 16 (ns)
t_RAC = 2.0 × t_cyc – 40 (ns)
t_RP = t_CRP = 1.0 × t_cyc – 23 (ns)
t_CAC = 1.0 × t_cyc – 38 (ns)
t_CSR = 0.5 × t_cyc – 16 (ns)
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