HD6437020 Datasheet, PDF (464/507 Pages) Hitachi Semiconductor – SuperH™ RISC engine

Table 19.6 Bus Timing (1) (cont)
Conditions: V_CC = 5.0 V ±10%, V_SS = 0 V, φ = 20 MHz, Ta = –20 to +75°C*
*: Normal products. Ta = –40 to +85°C for wide-temperature range products.
Item
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^*6
Read data access time 2^*6
RAS delay time 1
RAS delay time 2
CAS delay time 1
CAS delay time 2
CAS delay time 3
Column address setup time
Read data
access time
from CAS 1*6
35% duty^*2
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
Symbol
t_WPDD1
t_WPDD2
t_WPDH
t_WTS
t_WTH
t_ACC1
t_ACC2
t_RASD1
t_RASD2
t_CASD1
t_CASD2
t_CASD3
t_ASC
t_CAC1
t_CAC2
t_RAC1
t_RAC2
t_CP
Min
Max
—
40
—
20
0
—
14
—
10
—
t_cyc – 30*⁴
—
t_cyc × (n+2) – —
30^*3
—
20
—
30
—
20
—
20
—
20
0
—
t_cyc × 0.65 – —
19
t_cyc × 0.5 – 19 —
t_cyc × (n+1) – —
25^*3
t_cyc × 1.5 – 20 —
t_cyc × (n+2.5) – —
20^*3
t_cyc × 0.25
—
Unit Figures
ns 19.9, 19.13, 19.14
ns 19.11, 19.12
ns 19.9, 19.11–19.14
ns 19.10, 19.15, 19.19
ns
ns 19.8, 19.11, 19.12
ns 19.9, 19.10, 19.13,
19.14
ns 19.11–19.14,
ns ^{19.16–19.18}
ns 19.11
ns 19.13, 19.14,
ns ^{19.16–19.18}
ns 19.11, 19.12
ns
ns
ns 19.13, 19.14, 19.15
ns 19.11, 19.12
ns 19.13, 19.14, 19.15
ns 19.12
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