Operation timing diagrams of MAX 485
MAX485
Table of MAX 485 operation
Transmitting
Inputs
Outputs X
RE
DE
DI
Z
Y
X
1
1
0
1
X
1
0
1
0
0
0
X
Z
Z
1
0
X
Z
Z
X-don’t care
Z-high impedance
Receiving
Inputs
Outputs
RE
DE
A-B
RO
0
0
+0.2V
1
0
0
-0.2V
0
0
0
open
1
1
0
X
Z