HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 498

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

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