Abstract:
An LCD controller includes at least one I/O pad for providing an LCD drive voltage in an LCD mode of operation. I/O pad logic drives the at least one I/O pad responsive to a provided bias voltage. Voltage selection logic selects a higher voltage between an LCD drive voltage and an externally provided system voltage as a first voltage. Bias voltage logic selects one of the system voltage or the first voltage as the bias voltage for the I/O pad logic. The system voltage is selected as the bias voltage for the I/O pad logic in a non-LCD mode of operation for the I/O pad and the first voltage is selected for the bias voltage for the I/O pad logic in the LCD mode of operation for the I/O pad.
Abstract:
A system and method for an anti-pinch powered window system includes a window and a mechanical drive mechanism for raising and lowering the window. An electric motor drives the mechanical drive mechanism responsive to a command. A microcontroller unit generates the command responsive to a measured load current of the electric motor. A command to change direction of the window is generated responsive to a determination that the measured load current has exceeded a variable threshold level indicating that the window has stopped due to an obstruction. The variable threshold level is determined by the load current data stored within a memory.
Abstract:
The integrated system on a chip with LINBUS network communication capabilities includes processing circuitry for performing predefined digital processing functionalities on the chip. A free running clock circuit generates a temperature compensated clock that does not require a synch signal from external to the chip. A LINBUS network communications interface digitally communicates with off-chip LINBUS devices. Communication between said on-chip LINBUS communications interface and the off-chip LINBUS devices is affected without clock recovery. The LINBUS network communication interface has a time base derived from the temperature compensated clock which is independent of any timing information in the input data received during a receive operation. The temperature compensated clock further provides an on-chip time reference for both the processing circuitry and the LINBUS network communications interface.
Abstract:
An integrated circuit package includes a processing core and an internal oscillator. The processing core operates on a set of instructions to carry out predefined processes. The internal oscillator provides a system clock for the integrated circuit package. The internal oscillator has associated therewith an internal control register for controlling the operation of the internal oscillator responsive to control bits of the internal oscillator controlled by the processing core.
Abstract:
Method and apparatus for combining outputs of multiple DACs for increased bit resolution. A method for providing an increased bit resolution to a data converter operable to convert digital information to analog values. A first current Digital-to-Analog (IDAC) converter is controlled to provide current to a first output node, the first IDAC having a first current step size associated with the Least Significant Bit (LSB) thereof. A second IDAC is controlled to provide current to the first output node, the second IDAC having a second current step size associated with the LSB thereof that is smaller than the first current step size. The combination of the first and second IDACs increases the bit resolution of the first IDAC when driving the first output node with the second IDAC.
Abstract:
SAR analog-to-digital converter with abort function. A method for increasing the throughput of a data converter decision is disclosed. First, a data conversion operation is initiated to convert analog signals on an analog input on a data converter to digital data by sampling the analog signals on the analog signal input and then converting the sampled analog signals to digital data with a predetermined data conversion algorithm in a data conversion operation. The digital output of the data converter is compared to a threshold voltage value. When the output of the data converter is determined by the step of comparing to meet a predetermined relationship relative to the threshold voltage, the data conversion operation is terminated prior to the complete execution of the data conversion operation on the sampled analog signals.
Abstract:
An LCD controller includes a charge pump circuit for generating a charge voltage responsive to an external voltage and a clock signal. An oscillator generates the clock signal responsive to at least one bias voltage. The oscillator has a high power mode of operation and a low power mode of operation. Bias circuitry for applies the at least one bias voltage to the oscillator. The at least one bias voltage is applied to the oscillator from an external source in the high power mode of operation and the at least one bias voltage is applied to the oscillator from a source within the oscillator in the low power mode of operation. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an LCD display responsive to the charge voltage.
Abstract:
Charge pump circuitry comprises a voltage for generating a first regulated voltage. A low drop out regulator generates a second regulated voltage responsive to the first regulated voltage. A charge pump voltage generation circuit generates a voltage. First and second resistor strings are responsive to the generated voltage. The first resistor string provides a first plurality of bias voltages to an LCD responsive to the voltage in a first mode of operation and the second resistor string provides faster charging and discharging of the connected LCD elements responsive to a second mode of operation.
Abstract:
A pin interface for an integrated circuit. The pin interface includes logic gates for processing digital signals, and analog lines for carrying analog signals. The pin interface includes circuits for disabling the digital circuits when configured to carry analog signals. A comparator is associated with at least one of the pins for comparing the analog voltage level thereon with a reference voltage.
Abstract:
An output pad control logic comprises an output buffer including a plurality of transistors connected to drive signals for an output pad. Each of the plurality of transistors includes an n-well. An n-well generator connects a first voltage to the n-wells of the plurality of transistors of the output buffer in a first mode of operation when a system rail voltage exceeds a pad voltage applied to the output pad. The n-well generator connects the pad voltage to the n-wells of the plurality of transistors of the output buffer in a second mode of operation when the pad voltage applied to the output buffer exceeds the system rail voltage. A switching circuit is responsive to at least one control signal to connect the system rail voltage as the first voltage when the output pad is not driving an LCD display and to connect a larger of the system rail voltage and an LCD drive voltage as the first voltage when the output pad is driving the LCD display.