iC-VRV
BIDIRECTIONAL µP INTERFACE TO 24V
Rev A2, Page 11/12
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
I2
I3
I4
I5
t
t
t
t
t
AR
RA
RD
DF
RW
Setup Time:
CSN, A0, A1 set before RDN hi6lo
4
4
4
4
4
30
10
ns
ns
ns
ns
ns
Hold Time:
CSN, A0, A1 stable after RDN lo6hi
Read Data Access Time:
Data valid after RDN hi6lo
120
65
Read Data Hold Time: Ports high
impedance after RDN lo6hi
Recovery Time between Read/Write
Cycles
165
Data Word Write Timing
I6
I7
I8
I9
t
t
t
t
AW
DW
WA
WD
Setup Time:
CSN, A0, A1 set before WRN hi6lo
4
4
4
4
30
100
10
ns
ns
ns
ns
Write Data Setup Time:
Data valid before WRN lo6hi
Hold Time:
CSN, A0, A1 stable after WRN lo6hi
Write Data Hold Time:
10
Data valid after WRN lo6hi
Figure 3: Reference levels
Figure 4: Data word read/write timing
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