Fujitsu C141-E090-02EN manual Timing PIO data transfer, Dior-/Diow

5.6Timing

5.6.1PIO data transfer

Figure 5.8 shows of the data transfer timing between the device and the host system.

t0

Addresses

DIOR-/DIOW-

t1

t2

t9

t2i

Write data

DD0-DD15

t3

t4

Read data

DD0-DD15

t5

t6

IORDY

t10

t11

t12

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

t5

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

Figure 5.8 PIO data transfer timing

C141-E090-01EN 5 - 85