Abstract: A method for monitoring various parameters and conditions of a rechargeable battery to accurately determine the remaining charge level of the rechargeable battery, and includes using a temperature sensor to monitor the temperature of the rechargeable battery. The potential level of the rechargeable battery is monitored with a voltage meter coupled to the rechargeable battery. The current flow into and out of the rechargeable battery is monitored with current meter coupled to the rechargeable battery. A current accumulator coupled to the current meter is used to accumulate the net total of current flow, and an oscillatory circuit is used to generate a timing signal to time selected functions.

Abstract: A rechargeable battery pack with low powered, gas gauge circuitry for monitoring and accumulating various operating parameters of the rechargeable battery pack, includes a current monitor for measuring the current flow into and out of a battery cell in the rechargeable battery pack. An integrated current accumulator connected to the current monitor is used to maintain a measure of the net charge having flowed into and out of the battery cell. A charging current accumulator, which is also coupled to the current monitor, is used to maintain a measure of the total charge having flowed into the battery cell, while a discharging current accumulator is used to maintain a measure of the total charge having flowed out of the battery cell. A highly accurate oscillator is used to drive the accumulators to greatly increase the accuracy of the gas gauge functions derived therefrom.

Abstract: A method for monitoring various parameters and conditions of a rechargeable battery to accurately determine the remaining charge level of the rechargeable battery, and includes using a temperature sensor to monitor the temperature of the rechargeable battery. The potential level of the rechargeable battery is monitored with a voltage meter coupled to the rechargeable battery. The current flow into and out of the rechargeable battery is monitored with current meter coupled to the rechargeable battery. A current accumulator coupled to the current meter is used to accumulate the net total of current flow, an oscillatory circuit is used to generate a timing signal to time selected functions, and a timestamp will be generated indicative of a time when the battery ceases to be charged such that a self discharge correction is capable of being calculated.

Abstract: A mixed-signal processor (MSP) chip with a flexible serial interface which simultaneously accommodates two serial ports on a reduced number of pins. The pin definitions of these serial ports are configured to function well with several different external chips. Any two of these chips, or two of any one of these chips, may be used concurrently by the present MSP. When used with chips that require it, the present MSP chip provides a clock signal to each of these. When used with other chips, the MSP will can receive a clock signal from an external chip, and will then pass this signal through to any chip on the other of the two serial ports.

Abstract: A rechargeable battery pack with low powered, gas gauge circuitry for monitoring and accumulating various operating parameters of the rechargeable battery pack, includes a current monitor for measuring the current flow into and out of a battery cell in the rechargeable battery pack. An integrated current accumulator connected to the current monitor is used to maintain a measure of the net charge having flowed into and out of the battery cell. A charging current accumulator, which is also coupled to the current monitor, is used to maintain a measure of the total charge having flowed into the battery cell, while a discharging current accumulator is used to maintain a measure of the total charge having flowed out of the battery cell. A highly accurate oscillator is used to drive the accumulators to greatly increase the accuracy of the gas gauge functions derived therefrom.

Abstract: An electronic device for monitoring the operating conditions of a rechargeable battery, and includes a temperature monitor for monitoring the operating temperature of the rechargeable battery; a voltage determiner coupled to the rechargeable battery for measuring the potential level of the rechargeable battery; a one wire interface for outputting the information corresponding to the potential level of the rechargeable battery and the information corresponding to the temperature monitored by the temperature monitor; and a power regulator coupled to the rechargeable battery for supplying regulated power from the rechargeable battery to the temperature monitor and the voltage determiner. The voltage determiner includes an analog to digital converter and utilizes a successive approximation technique to determine and output a digital value corresponding to the potential level of the rechargeable battery.

Abstract: A frame buffer is provided, including a plurality of input nodes and a plurality of multiplexing circuits. Each multiplexing circuit has a first input coupled to a respective input node. First control circuitry is provided for selectively coupling a second input of each multiplexer circuit to outputs of others of the multiplexing circuits. Second control circuitry is coupled to each multiplexing circuit for selecting between the first and second inputs.

Abstract: A frame buffer is provided, including a plurality of input nodes and a plurality of multiplexing circuits. Each multiplexing circuit has a first input coupled to a respective input node. First control circuitry is provided for selectively coupling a second input of each multiplexer circuit to outputs of others of the multiplexing circuits. Second control circuitry is coupled to each multiplexing circuit for selecting between the first and second inputs.

Abstract: A frame buffer is provided, including a plurality of input nodes and a plurality of multiplexing circuits. Each multiplexing circuit has a first input coupled to a respective input node. First control circuitry is provided for selectively coupling a second input of each multiplexer circuit to outputs of others of the multiplexing circuits. Second control circuitry is coupled to each multiplexing circuit for selecting between the first and second inputs.