N

°

Symbol

Parameter

Value (Note)

Min. Max. Unit

OSCIN Divided

By 2

OSCIN Not Divided

By 2

Min.

Max.

Min.

Max.

1

TwRDY

RDRDY, WRRDY Pulse

Width in One Line

Handshake

2TpC

(P+W+1) –18

TpC

(P+W+1) –

18

65

ns

2

TwSTB

RDSTB, WRSTB Pulse

Width

2TpC+12

TpC+12

95

ns

3

TdST

(RDY)

RDSTB, or WRSTB

↑

to RDRDY or WRRDY

↓

TpC+45

(TpC-TwCL)

+45

87

ns

4

TsPD

(RDY)

Port Data to RDRDY

↑

Set-up Time

(2P+2W+1)

TpC –25

TwCH+

(W+P)

TpC –25

16

ns

5

TsPD

(RDY)

Port Data to WRRDY

↓

Set-up Time in One Line

Handshake

43

43

43

ns

6

ThPD

(RDY)

Port Data to WRRDY

↓

Hold

Time in One Line

Handshake

00

0

ns

7

TsPD

(STB)

Port Data to WRSTB

↑

Set-up Time

10

10

10

ns

8

ThPD

(STB)

Port Data to WRSTB

↑

Hold Time

25

25

25

ns

9

TdSTB

(PD)

RDSTBD

↑ to Port Data

Delay Time in

Bidirectional Handshake

35

35

35

ns

10

TdSTB

(PHZ)

RDSTB

↑ to Port High-Z

Delay Time in

Bidirectional Handshake

25

25

25

ns

Note: The value in the left hand two columns show the formula used to calculate the timing minimum or maximum from the oscillator clock

period, prescale value and number of wait cycles inserted.

The value in the right hand two columns show the timing minimum and maximum for an external clock at 24 MHz divided by 2, prescaler value

of zero and zero wait status.

Legend:

P

= Clock Prescaling Value (R235.4,3,2)

W

= Programmable Wait Cycles (R252.2.1.0/5,4,3) + External Wait Cycles

Push-pull output configuration, unless otherwise specified)

®

ST9040

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