HD6437020 Datasheet, PDF (498/507 Pages) Hitachi Semiconductor – SuperH™ RISC engine

19.3.4 DMAC Timing
Table 19.9 DMAC Timing
Case A: V_CC = 3.0 to 5.5 V, V_SS = 0 V, Ta = –20 to +75°C*
Case B: V_CC = 5.0 V ±10%, V_SS = 0 V, Ta = –20 to +75°C*
*: Normal products. Ta = –40 to +85°C for wide-temperature range products.
Case A
Case B
12.5 MHz 16.6 MHz 20 MHz
Item
Symbol Min Max Min Max Min Max Unit Figure
DREQ0, DREQ1 setup time
t_DRQS
DREQ0, DREQ1 hold time
t_DRQH
DREQ0, DREQ1 low level width t_DRQW
80 —
30 —
1.5 —
40 —
30 —
1.5 —
27 —
30 —
1.5 —
ns 19.34
ns
t_cyc 19.35
CK
DREQ0, DREQ1
level
t_DRQS
t_DRQS t_DRQH
DREQ0, DREQ1
edge
DREQ0, DREQ1
level release
t_DRQS
Figure 19.34 DREQ0, DREQ1 Input Timing (1)
CK
DREQ0, DREQ1
edge
t_DRQW
HITACHI 490
Figure 19.35 DREQ0, DREQ1 Input Timing (2)