Abstract:
The invention relates to a configurable IC device pin (14), which may be either a device clock input pin or a digital I/O pin in one embodiment, or a reset pin or a digital I/O pin in another embodiment. Both embodiments use a memory device (16) to store configuration data for the pin. Input/output logic (18) is also used in both embodiments to transfer data to and from the IC pin (14) when configured as a digital I/O pin.
Abstract:
A zero-current start-up circuit (20) for a reference circuit (22) which is initially unbiased and which has internal nodes that need to be regulated to a predetermined voltage. When the start-up circuit (20) is enabled, a switching transistor (36) is turned on which enables the reference circuit (22) to generate an internal reference current which regulates an output current to a predetermined value set by the reference circuit (22). The output current flows through a voltage drop device (40 and 42) and when the voltage level reaches a predetermined value, the start-up circuit (20) is disabled eliminating the current path.
Abstract:
The present invention relates to a fail-safe non-volatile memory programming system. The system uses a high voltage charging capacitor (16) to store a charge for programming a memory device. A second charging capacitor (30) is used for supplying power to the control logic (26) used for programming the memory device. If power is removed during a programming cycle, the charge stored in the two capacitors is sufficient to complete the programming cycle.
Abstract:
A microcontroller circuit (10) includes an oscillator (14) receiving frequency trimming data (28) from a memory (16) under control of a microcontroller logic (12). The microcontroller logic (12) permits a user to alter the trimming data and to select through an oscillator logic (20) either the oscillator (14) or an external oscillator source (34) as a system clock (32).
Abstract:
This disclosure is directed to a method of producing a smooth surface for a dielectric coating (34) that is located above the surface of semiconductor substrate (10) containing doped regions (26, 32, 34) of a semiconductor device. Sharp edges (40, 42) formed in the dielectric coating (34) during certain semiconductor processing steps are removed using a deposition process to deposit a separate insulating layer (48) on the dielectric coating (34) containing the sharp edges (40, 42) followed by an annealing operation and the subsequent removal of the separate insulating layer (48) to permit the subsequent formation of electrodes (50, 52, 54) on a smooth surface of the dielectric coating (34).
Abstract:
An Integrated Circuit (IC) (10) package is disclosed comprising an IC chip (11) with a microcontroller (12) therein having an n-bit data bus, and up to n pins (34-38) electrically coupled to the microcontroller (12). The IC package also includes a control register coupled to the microcontroller for receiving enable and disable signals from the microcontroller. One or more of the pins have one or more functional blocks associated thereto. Each functional block defines a specified function for its corresponding pin. Thus, each pin having a plurality of corresponding functional blocks has a number of potential functions equal to the number of corresponding functional blocks. The specific function for a given pin is selected by the enable signal from the control register which selects the appropriate functional block upon appropriate command from the microcontroller. By using pins with multiple functions, the instant invention permits an n-bit architecture microcontroller to use less than or up to n pins.
Abstract:
The present invention relates to a microcontroller that may be configured to operate without the accompaniment of any external component. The microcontroller can function in a proper manner from the application of only power and signal lines with no external component required. The microcontroller (10) has integrated internal reset (14) and oscillator (16) circuitry into the microcontroller. The microcontroller has also integrated simple external components such as current limiting resistors into the microcontroller.
Abstract:
The present invention relates to a microcontroller that may be configured to operate without the accompaniment of any external components. The microcontroller can function in a proper manner from the application of only power and signal lines with no external components required. The microcontroller (10) has integrated internal reset (14) and oscillator (16) circuitry into the microcontroller. The microcontroller has also integrated simple external components such as current limiting resistors and pull up and pull down resistors into the microcontroller in order to avoid application specific external components.
Abstract:
An RC oscillator circuit (10) within a microcontroller chip includes first and second comparators (16, 18) having their outputs respectively coupled to set and reset inputs of a flip-flop (20) whose output is coupled to a series RC network (22, 14) for controlling charging and discharging of a capacitor (14) of the RC network between precise high and low voltage levels (V2 and V1). One input of each comparator is coupled to the RC network, while the second input is coupled to a respective modified high and low threshold voltage level (Vh', V1'), so that the oscillator signal does not exceed the precise high and low voltage levels (V2, V1). The output frequency of the oscillator may be adjusted by selecting different values of the low voltage level (V1).