Preliminary
HT9015
¨
SIG_OUT selection
The SIG_OUT terminal generates combination states of RX and TX lock detectors. The RSSI and
NOISE detector are shown in figure 2 below.
SW1 and SW2 in Fig. 3 determine the output on SIG_OUT using selection bits in a control regis-
ter according to the figure below.
L
D
T
X
L
D
R
X
R
S
S
I
N
D
D
a
e
c
i
d
e
D
a
e
S
c
W
i
1
T
d
e
S
W
2
U
n
d
L
D
n
O
d
U
D
E
T
O
T
E
x
a
m
p
l
e
:
T
X
l
o
c
k
d
e
t
e
c
t
o
r
o
p
e
r
a
t
i
o
n
L
D
T
X
L
D
R
X
R
S
S
I
N
D
1
0
0
0
Figure 2 SIG_OUT bits
S
W
1
R
X
P
L
L
L
O
C
K
D
E
T
E
C
T
O
R
L
D
O
U
T
S
I
G
_
O
U
T
R
X
L
D
T
X
L
D
T
X
P
L
L
S
W
2
D
E
T
O
U
T
I
F
A
M
P
N
O
I
S
E
D
E
T
E
C
T
O
R
R
S
S
I
N
_
F
I
L
_
I
N
T
O
R
S
S
I
I
E
n
t
e
r
n
a
l
R
S
S
I
D
E
T
N
_
R
E
N
C
D
N
_
F
I
L
_
O
A
U
F
U
T
x
t
e
r
n
a
l
Figure 3 Signal output block diagram
13
April 10, 2000
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
