Hitachi RAS-08PH1 - Page 47

Fig. 2-4
(
1
)
Outdoor microcomputer
(
HIC
)
to indoor microcompute
r
Serial Communications Format during Normal Communications
E
xampl
e
When the outdoor message is all 0s
and indoor message is all 1s:
(
3
)
Communications waveforms
L
eade
r
100
ms
.
L
eade
r
100
ms
.
W
hen rese
t
(
approx.100ms.
)
W
hen rese
t
(
approx.10ms.
)
35
(
V
)
34
(
V
)
36
(
V
)
0
7
0
7
7
7
0
33
.
3
ms
.
3
2
1
NO
0
Bit No.=
0
7
0
7
0
7
0
7
B
it No.=
0
3
2
1
(
33.3ms.
)
(
33.3ms.
)
(
33.3ms.
)
T
r
ansmit
/
r
eceiv
e
s
witching tim
e
(
4.95ms.
)
(
33.3ms.
)
(
33.3ms.
)
Outdoor messag
e
I
ndoor messag
e
(
33.3ms.
)
(
33.3ms.
)
0
Character No
.
(
2
)
I
n
n
door microcomputer to outdoor microcomputer
(
HIC
)
47