On chip debugging method of microcontrollers

Details On chip debugging method of microcontrollers On chip debugging method of microcontrollers

2006-03-28

2006-03-28

Decady, Albert (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Transmission facility testing

C714S724000, C714S030000

Reexamination Certificate

active

07020813

ABSTRACT:
A microcontroller includes an external interface terminal group, a data transmit/receive section, and a DMA controller comprised of an address register for storing therein an address of a hardware serving as an object to be accessed by DMA, registers for executing read/write by the DMA, a control flag for controlling the start of the DMA, and a timing controller of the DMA. The microcontroller further includes a register for storing therein flag information for determining whether access can be executed or not by the DMA and a unit for outputting a bus state recognition signal indicating whether a bus state is rendered in a state to be accessed or not by the DMA.

REFERENCES:
patent: 5379382 (1995-01-01), Work et al.
patent: 5537607 (1996-07-01), Ploger, III
patent: 5737638 (1998-04-01), Byrn et al.
patent: 6467009 (2002-10-01), Winegarden et al.

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