Fujitsu MHW2040AC Manual Do Utilizador
5.6 Timing
5.6 Timing
5.6.1 PIO data transfer
Figure 5.9 shows of the data transfer timing between the device and the host
system.
system.
t6
t12
t11
t10
t5
t4
t3
t9
t2i
t2
t1
t0
Addresses
IORDY
Read data
DD0-DD15
Write data
DD0-DD15
DIOR-/DIOW-
Symbol Timing
parameter Min.
Max.
Unit
t0
Cycle time
120
—
ns
t1
Data register selection setup time for DIOR-/DIOW-
25
—
ns
t2
Pulse width of DIOR-/DIOW-
70
—
ns
t2i
Recovery time of DIOR-/DIOW-
25
—
ns
t3
Data setup time for DIOW-
20
—
ns
t4
Data hold time for DIOW-
10
—
ns
Time from DIOR- assertion to read data available
—
50
ns
t6
Data hold time for DIOR-
5
—
ns
t9
Data register selection hold time for DIOR-/DIOW-
10
—
ns
t10
Time from DIOR-/DIOW- assertion to IORDY "low" level
—
35
ns
t11
Time from validity of read data to IORDY "high" level
0
—
ns
t12
Pulse width of IORDY
— 1,250
ns
t5
Figure 5.9 PIO data transfer timing
C141-E258
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