CPC7583
1.9.2 Truth Table for CPC7583xC and CPC7583xD
Ringing
Test
Switches
TEST
TEST
Break
Switches
Ringing
Switches
IN
OUT
IN
IN
IN
T
SD
State
Latch
RINGING
TESTIN
TESTOUT
Switches
Switches
Talk
0
0
0
0
0
1
0
1
0
Off
Off
On
On
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
TESTout
TESTin
Simultaneous
TESTin and
TESTout
0
1
1
1
0
1
1
0
0
On
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
On
Off
Off
Ringing
0
Ringing
Generator
Test
1 or
1
Floating
Simultaneous
TESTout and
Ringing
1
1
1
Off
Off
On
Off
On
Generator
Test
Latched
X
1
X
0
X
1
1
0
X
Unchanged Unchanged Unchanged Unchanged Unchanged
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
All Off
2
X
X
X
0
1
2
If T is tied high, thermal shutdown is disabled. If T is left floating, the thermal shutdown mechanism functions normally.
SD SD
Forcing T to ground overrides the logic input pins and forces an all off state.
SD
R06
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