CPC7592
1.10 Truth Tables
1.10.1 CPC7592xA and CPC7592xB Truth Table
Break
Switches
Ringing
Switches
Test
Switches
IN
IN
T
SD
State
LATCH
RINGING
TEST
Talk
Test
0
0
1
1
X
X
0
1
0
1
X
X
On
Off
Off
Off
Off
Off
Off
On
Off
Off
0
1
Ringing
All-Off
On
Z
Off
Latched
1
Unchanged
Off
All-Off
X
0
Off
Off
1
Z = High Impedance. Because T has an internal pull up at this pin, it should be controlled with an open-collector or open-drain type device.
SD
1.10.2 CPC7592xC Truth Table
Break
Switches
Ringing
Switches
Test
Switches
IN
IN
T
SD
State
LATCH
RINGING
TEST
Talk
0
0
1
1
X
X
0
1
0
1
X
X
On
On
Off
Off
Off
Off
Off
On
Off
On
Test/Monitor
Ringing
0
1
On
Z
Ringing Test
Latched
On
1
Unchanged
Off
All-Off
X
0
Off
Off
1
Z = High Impedance. Because T has an internal pull up at this pin, it should be controlled with an open-collector or open-drain type device.
SD
10
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