Motorola Corporation

Other

Hing Leung Yiu

Glen James Zoerner

Wendy Reed

Ralph E Snowden

Harvey H Wong

On Ki Chu

Michael C Chu

Andrew Chu

Jeff Gokinko

Eric Cheng

Karson Chan

Wai-Kin Steven Kwan

A lapping tool has an elongate shank mechanically coupled to a platform, having a generally planar working surface, by a universal joint comprising a ball and socket. A cavity is provided for entrapping grinding paste. Normally, the parts are made of electrically conductive materials so that current can be passed from the shank via the working surface to surface of a workpiece that is to be polished.

Lapping tool

An arrangement and method for producing a plurality of pulse width modulated outputs, comprising: receiving values representative of durations of pulses to be generated at the outputs (210); producing values representative of the time differences (230) between transitions of pulses to be produced; and producing transitions in the pulses in the plurality of channels at times corresponding to the time Difference values.

Arrangement and method for producing a plurality of pulse width

A method and apparatus for reducing power consumption in a portable electronic device (100) with an LCD screen (104) and operating with a CPU (114) switchable between a high power mode and a low power mode. When input commences on a surface of the LCD screen (104), an interrupt signaler (108) generates a first interrupt signal to an interrupt controller (112). Upon receiving the first interrupt signal, the interrupt controller (112) switches the CPU (114) from the low power mode to the high power mode, turning on at least one detection panel (106) coupled to the LCD screen (104) and to an ADC (110). When input ceases on the surface, the interrupt signaler (108) generates a second interrupt signal to switch the CPU (114) from the high power mode to the low power mode, turning off the at least one detection panel (106) and the ADC (110).

Method for reducing power consumption in a portable electronic device

A data processing system (20) has a display controller (28) that uses bus arbitration and data bursting to supply display data for refreshing an LCD screen (49), utilizing a system memory (30) instead of a separate video RAM. A screen DMA (58) fills a line buffer (60) with display data from the system memory (30) in bursts of a predetermined number of words. The screen DMA (58) receives a faster clocking signal than is used by the CPU (22). This allows the screen DMA (58) to run faster than the CPU (22) to reduce bandwidth needed to retrieve the display data. In addition, if the CPU (22) clock frequency is changed for power management purposes, the LCD screen (49) is not affected since it uses a different clock. By using the system memory (30) for storing display data, pin count, packaging costs, and board space are reduced.

Data processing system having display controller with bursting direct

When an external reset signal EXRST is asserted received by a reset unit (6), it is synchronised with an internal clock to produce an internal reset signal INRST, which is applied to a CPU (4) and other modules in the circuit to reset them. While the internal reset signal INRST is being applied to the CPU, the rate of a refresh signal being generated by a DRAM controller (7) for refreshing data in DRAM (3) is increased. Then, when the external reset signal EXRST is disabled, a delayed reset signal DLYRST is generated and applied to the DRAM controller (7) so that it is reset. The CPU, being already reset, can then quickly reconfigure the DRAM controller and re-enable it to resume refreshing the DRAM (4), thus maintaining the data in the DRAM.

Circuit and method for retaining data in DRAM in a portable electronic

A data processing system (20) has a multi-function scalable parallel I/O port (44). The I/O port (44) includes a plurality of I/O port circuits (55, 56) coupled to I/O terminals (67, 77) . The I/O port (44) can multiplex two functions onto one terminal (67,77) . One function is an I/O function and the other function is function under the control of an internal module (22, 24, 26, 32) connected to the terminal (67, 77). Each I/O port circuit (55, 56) has either a pull-down circuit (68) or a pull-up circuit (78) coupled to the terminal (67, 77). The pull-up and pull-down circuits (78, 68) are controllable using a control register (81, 82). The pull-up and pull-down circuits (78, 68) for each terminal (67, 77) can be individually selected, and function whether the I/O port (44) is selected or deselected.

Data processing system having a multi-function input/output port with

In a portable electronic device, a method and apparatus for providing a predetermined portion of a limited resource from a programmable resource allocators (PRAs) (240) to a processor (22) to execute a task (210) optimally. The processor (22) programming the PRA with a resource utilization input (RUI) (250) prior to executing the task (210). The RUI (250) stored in a task descriptor (220), and the task descriptor (220) and the task (210) stored in the memory (200).

Growing community of inventors

Hong Kong, China

Hing Leung Yiu