iC-VRV

BIDIRECTIONAL µP INTERFACE TO 24V

Rev A2, Page 11/12

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Figure 4: Data word read/write timing

Figure 3: Reference levels

OPERATING REQUIREMENTS: µP INTERFACE

Operating Conditions: VCC= VCCA= VCCD= 5V ±10%, Ta= 0..70EC, CL()= 150pF,

input levels lo= 0..0.45V, hi= 2.4V..VCC, see Fig. 3 for reference levels and waveforms

Item

Symbol

Parameter

Conditions

Fig.

Unit

Min.

Max.

Data Word Read Timing

I1

Setup Time:

CSN, A0, A1 set before RDN hi6lo

4

30

ns

I2

Hold Time:

CSN, A0, A1 stable after RDN lo6hi

4

10

ns

I3

Read Data Access Time:

Data valid after RDN hi6lo

4

120

ns

I4

Read Data Hold Time: Ports high

impedance after RDN lo6hi

4

65

ns

I5

Recovery Time between Read/Write

Cycles

4

165

ns

Data Word Write Timing

I6

Setup Time:

CSN, A0, A1 set before WRN hi6lo

4

30

ns

I7

Write Data Setup Time:

Data valid before WRN lo6hi

4

100

ns

I8

Hold Time:

CSN, A0, A1 stable after WRN lo6hi

4

10

ns

I9

Write Data Hold Time:

Data valid after WRN lo6hi

4

10

ns