Hitachi DK23DA-30F Owners Manual - Page 97
Read Data Valid to IORDY active
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Figure 6-5 IORDY Timing Read Data Valid DIOR-/DIOW- tA tB IORDY SYMBOL Description tA IORDY Setup Time tB IORDY Pulse Width tRD Read Data Valid to IORDY active tB IORDY assertion to release tRD tC MIN(ns) 0 MAX(ns) 35 1250 5 çççç Figure 6-7 Multi-word DMA Data Transfer Timing(Mode 2) CS0-/CS1DMARQ DMACKDIOR-/DIOWWrite Data Valid *3 Read Data Valid *3 tM t0 tI tD tL tK tGw tH tGr tF tE tN tJ tZ *3 Data Consists DD(15:0) SYMBOL Description t0 Cycle Time tD DIOR- /DIOW- Pulse Width tE DIOR- Data Access tF DIOR- Data Hold K6602705 Rev.3 08.20.01 MIN(ns) 120 70 5 MAX(ns) 50 - 97 -
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K6602705
Rev.3
08.20.01
- 97 -
Figure 6-5
IORDY Timing
SYMBOL
Description
MIN(ns)
MAX(ns)
t
A
IORDY Setup Time
35
t
B
IORDY Pulse Width
1250
t
RD
Read Data Valid to IORDY active
0
t
B
IORDY assertion to release
5
Figure 6-7
Multi-word DMA Data Transfer Timing(Mode 2)
*3
Data Consists DD(15:0)
SYMBOL
Description
MIN(ns)
MAX(ns)
t
0
Cycle Time
120
t
D
DIOR- /DIOW- Pulse Width
70
t
E
DIOR- Data Access
50
t
F
DIOR- Data Hold
5
t
M
t
0
t
L
t
I
t
D
t
K
t
J
t
Gw
t
Gr
t
H
t
F
DMARQ
DMACK-
DIOR-/DIOW-
Write Data Valid *3
Read Data Valid *3
CS0-/CS1-
t
N
t
E
t
Z
t
A
t
B
DIOR-/DIOW-
IORDY
t
RD
Read Data Valid
t
C