HD6437020 Datasheet, PDF (463/507 Pages) Hitachi Semiconductor – SuperH™ RISC engine

Item
Symbol Min
Max Unit Figures
Address delay time
t_AD
—
20^*1 ns
19.8, 19.9, 19.11–19.14,
19.19, 19.20
CS delay time 1
t_CSD1
—
25 ns 19.8, 19.9, 19.20
CS delay time 2
t_CSD2
—
25 ns
CS delay time 3
t_CSD3
—
20 ns 19.19
CS delay time 4
t_CSD4
—
20 ns
Access time 1^*6 35% duty*2 t_RDAC1 t_cyc × 0.65 – — ns 19.8
from read strobe
20
Access time 2^*6
from read strobe
50% duty
35% duty^*2
t_RDAC2
t_cyc × 0.5 – 20 —
t_cyc × (n+1.65) —
– 20^*3
ns
ns 19.9, 19.10
50% duty
t_cyc × (n+1.5) – — ns
– 20^*3
Access time 3^*6 35% duty^*2 t_RDAC3
from read strobe
t_cyc × (n+0.65) —
– 20^*3
ns 19.19
50% duty
t_cyc × (n+0.5) – — ns
– 20^*3
Read strobe delay time
Read data setup time
Read data hold time
Write strobe delay time 1
t_RSD
—
t_RDS
15
t_RDH
0
t_WSD1
—
20 ns 19.8, 19.9, 19.11–19.15,
19.19, 19.24–19.28
— ns 19.8, 19.9, 19.11–19.14,
— ns ^19.19
20 ns 19.9, 19.13, 19.14,
19.19, 19.20
Write strobe delay time 2
t_WSD2
—
20 ns 19.9, 19.13, 19.14,
19.19
Write strobe delay time 3
Write strobe delay time 4
Write data delay time 1
Write data delay time 2
Write data hold time
t_WSD3
—
t_WSD4
—
t_WDD1
—
t_WDD2
—
t_WDH
0
20 ns 19.11, 19.12
20 ns 19.11, 19.12, 19.20
35 ns 19.9, 19.13, 19.14, 19
20 ns 19.11, 19.12
— ns 19.9, 19.11–19.14
HITACHI 455