STLC3055N_09 STMICROELECTRONICS [STMicroelectronics], STLC3055N_09 Datasheet - Page 30

• Manufacturer Part Number: STLC3055N_09
• Description: WLL and ISDN-TA subscriber line interface circuit
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Typical state diagram for STLC3055N operation
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Typical state diagram for STLC3055N operation
Figure 21. State diagram
Note: all state transitions are under the microprocessor control.
On Hook Condition
PD=1,
D0=D1=0
Tj>Tth
Power
Down
Feeding
HI-Z
Off Hook Detection
PD=0, D0=D1=0
On Hook Detection for T>Tref
D0=1, D1=0,
D2=0/1
Ring Burst
Off Hook
D0=0, D1=1,
D2=0
Active
Ring Burst
Normally used for
On Hook Transmission
On Hook
Active
Off Hook Detection
Ringing
Ring Trip
Detection
D0=0, D1=1,
D2=0
Ring Pause
STLC3055N