Microcontroller with a caller identification unit

• US 5,781,621 A
• Filed: 02/22/1996
• Issued: 07/14/1998
• Est. Priority Date: 03/17/1995
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Kwok, Luen Hin, Chua, Tiong Kee, Sohi, Satinder Jit Singh, Lim, Cher Eng
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): LOOMIS, PAUL A
• Application Number:
  US08/603,844
• Time in Patent Office: 873 Days
• Field of Search: 379/93, 379/95, 379/96, 379/140, 379/142, 379/199, 379/201, 379/376, 375/334, 375/335, 375/336, 375/337, 341/143, 341/155
• US Class Current: 379/142.04
• CPC Class Codes: H04M 1/573 Line monitoring circuits for detecting caller identification
• CPC Class Codes: H04W 52/0274 by switching on or off the equipment or parts thereof
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A microcontroller (100) for processing caller information received from a telephone line to display on a display panel of a telecommunication device. The microcontroller (100) includes a central processing unit (160), a display control unit (110) for controlling the display panel, a ring detector (140), a carrier detector (150) for detecting the caller information, memory (120) for storing a plurality of predetermined control parameters, and a caller identification unit (130) for providing the caller information to the display control unit (110). Within the caller identification unit (130), a power management (134) unit controls a power supply (170) to a signal demodulator (132), based on the plurality of predetermined control parameters, to process the caller information. Of the plurality of predetermined control parameters, a first control parameter enables the power supply and a second control parameter disables the power supply (170) to the signal demodulator (132).

Claims

1. In a microcontroller for a telecommunication device, a method for controlling a power supply to a signal demodulator of a caller identification unit within the microcontroller when the caller identification unit receives caller information from a telephone line wherein the microcontroller includes memory means, a ring detector, a carrier detector, and a display control unit, the method comprising the steps of:

detecting a first ring on the telephone line by the ring detector;

enabling the power supply to the signal demodulator by a power management unit within a central processing unit based on a first control parameter of a plurality of predetermined control parameters stored in the memory means;

thereafter, processing the caller information by the signal demodulator, based on a number of data bytes of caller information detected by the carrier detector, to provide the caller information to the display control unit; and

disabling the power supply to the signal demodulator by the power management unit based on a second control parameter of the plurality of predetermined control parameters,

wherein the second control parameter is provided by activation of a no carrier detect flag when the carrier detector does not detect a carrier with caller information.

2. The method of claim 1 wherein the step of enabling the power supply to the signal demodulator occurs with activation of a ring detect flag as the first control parameter.

3. A microcontroller for processing caller information received from a telephone line to display on a display panel of a telecommunication device, the microcontroller comprising:

a display control unit for controlling the display panel;

a ring detector for detecting a plurality of rings on the telephone line wherein the plurality of rings includes a first ring;

a carrier detector for detecting the caller information; and

a caller identification unit for providing the caller information to the display control unit, the caller identification unit comprising;

a signal demodulator for processing the caller information;

a power supply for the signal demodulator; and

a central processing unit for processing data, the central processing unit includes;

a parameter memory for storing a plurality of predetermined control parameters;

a power management unit for controlling the power supply based on the plurality of predetermined control parameters that includes a second control parameter for disabling the power supply,

wherein the second control parameter is provided by activation of a no carrier detect flag when the carrier detector does not detect a carrier with caller information.

4. The microcontroller of claim 3 wherein the signal demodulator comprises:

a sigma delta convertor for converting the caller information from an analog format to a two-level quantized digital format;

a digital filter for noise filtering the caller information in the two-level quantized digital format; and

a demodulator for demodulating the caller information received from the digital filter to a baseband signal.

5. The microcontroller of claim 3 wherein one of the plurality of predetermined control parameters is a first control parameter when a ring detect flag is activated for the power management unit to enable the power supply to the signal demodulator when the ring detector detects the first ring.

6. A telecommunication device operating with information received from a telephone line and having a display panel for displaying caller information to the telecommunication device comprising:

a microcontroller for processing the information to provide the caller information, the microcontroller comprising;

a display control unit for controlling the display panel;

a ring detector for detecting a plurality of rings on the telephone line wherein the plurality of rings includes a first ring;

a carrier detector for detecting the caller information; and

a caller identification unit for providing the caller information, the caller identification unit comprising;

a signal demodulator for processing the caller information;

a power supply for the signal demodulator; and

a central processing unit for processing the information, the central processing unit includes;

a parameter memory for storing a plurality of predetermined control parameters;

a power management unit for controlling the power supply based on the plurality of predetermined control parameters that includes a second control parameter for disabling the

power supply,

wherein the second control parameter is provided by activation of a no carrier detect flag when the carrier detector does not detect a carrier with caller information.

7. The telecommunication device of claim 6 wherein the signal demodulator comprises:

a sigma delta convertor for converting the caller information from an analog format to a two-level quantized digital format;

a digital filter for noise filtering the caller information in the two-level quantized digital format; and

a demodulator for demodulating the caller information received from the digital filter to a baseband signal.

8. The telecommunication device of claim 6 wherein the memory means comprises a parameter memory within the central processing unit.

9. The telecommunication device of claim 6 wherein one of the plurality of predetermined control parameters is a first control parameter when a ring detect flag is activated for the power management unit to enable the power supply to the signal demodulator when the ring detector detects the first ring.