Table 1 : Serial Mode.

Meaning

Value

Data in (note 2)

BIT0R = Impedance (note 3)

0 - Stand-by/ringing

1 - Conversation

BIT1R = TTX & Ring Timing (note 4)

0 - Timing off

1 - Timing on

BIT2R = Ring (note 5)

0 - TTX Signal Injection

1 - Ring Signal Injection

BIT3R = TTX Level

BIT4R = Battery Polarity

0 - Normal Polarity

1 - Reverse Polarity

BIT5R = Extra Feeding

0 - Normal Battery

1 - Boosted Battery

BIT6R

BIT7R

Current

Limiting

0

25mA

0

0

30mA

1

1

45mA

1

1

70mA

0

Data Out (note 6)

BIT0T = Line Supervision

0 - On Hook

1 - Off Hook

BIT1T = Ground Key

1 - Long. Line Current < 17mA

0 - Long. Line Current > 17mA

BIT2T = Internal Line Current Limiter (note7)

0 - Off

1- On

BIT3T = Line Voltage

0 - Normal

1 - Minus of Half Battery

BIT4T = Thermal Overload (note 8)

1 - Off

0- On

No tes : 1. When C I si gnal i s tied to low level, NC S signal is the chip select i nput ; with CI signal at high level, the NCS signal

becomes an output that carry out the logi cal sum of the foll owing bi ts : B IT0T , BIT1T.

2. The description of the commands is ref erred to the system L3030 + LINE IN TERF ACE module.

4. TTX and R ING signals are i njected i nto t he line in terface module wi th BIT1R t o ”1”.

5. To set RIN G mode at l east one of the three last bi ts (BIT 5R, BIT 6R, BIT 7R) must be set t o 1, i n addi ti on B IT0R

must be set to 0.

6. The description of the commands is ref erred to the system L3030 + LINE IN TERF ACE module.

7. The bit BIT 2T is set to 1 w hen the SLI C is oper ating in Conver sation Mode and into the l imiti ng curr ent region (short

loop) .

8. The bit BI T4T is set to 1 when the junction temper ature of L3000S i s about 140

°C.

L3000S - L3030

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