L3030 STMicroelectronics, L3030 Datasheet - Page 12

• Manufacturer Part Number: L3030
• Description: SUBSCRIBER LINE INTERFACE KIT
• Manufacturer: STMicroelectronics

L3000S - L3030
Table 1 : Serial Mode.
Data in (note 2)
Data Out (note 6)
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
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BIT0R = Impedance (note 3)
BIT1R = TTX & Ring Timing (note 4)
BIT2R = Ring (note 5)
BIT3R = TTX Level
BIT4R = Battery Polarity
BIT5R = Extra Feeding
BIT0T = Line Supervision
BIT1T = Ground Key
BIT2T = Internal Line Current Limiter (note7)
BIT3T = Line Voltage
BIT4T = Thermal Overload (note 8)
BIT6R
BIT7R
2. The description of the commands is ref erred to the system L3030 + LINE IN TERF ACE module.
3. To set SBY mode wi th I
4. TTX and R ING signals are i njected i nto t he line interface 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
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
8. The bit BI T4T is set to 1 when the junction temper ature of L3000S i s about 140 C.
becomes an output that carry out the logi cal sum of the foll owing bi ts : B IT0T , BIT1T.
must be set to 0.
loop) .
Current
Limiting
Meaning
lim
= 7mA : BIT0R = 0 and at least one of the tw o l ast bits (B IT 6R ; BIT 7R) must be set to 1.
0 - Stand-by/ringing
1 - Conversation
0 - Timing off
1 - Timing on
0 - TTX Signal Injection
1 - Ring Signal Injection
0 - Low Amplitude (2V
1 - High Amplitude (5V
0 - Normal Polarity
1 - Reverse Polarity
0 - Normal Battery
1 - Boosted Battery
0 - On Hook
1 - Off Hook
1 - Long. Line Current < 17mA
0 - Long. Line Current > 17mA
0 - Off
1 - On
0 - Normal
1 - Minus of Half Battery
1 - Off
0 - On
25mA
0
0
30mA
0
1
RMS
RMS
Value
)
)
45mA
1
1
70mA
1
0