Patent
1996-07-12
1999-03-30
An, Meng-Ai T.
395308, 395309, 395311, 395290, 395520, 395840, 395582, G06F 1336
Patent
active
058899669
ABSTRACT:
A data processor has a memory 100 for storing instructions being connected to a microcomputer 10 having a function of fetching an instruction from an external memory 100 via an external bus 95, a plurality of peripheral input/output circuits 40 via 49 incorporated in the microcomputer 10, and each of the peripheral input/output circuits 40 via 49 being interconnected by an incorporated peripheral bus 90, a bus controller 30 in the microcomputer 10 having both a bus state counter 31 for the external bus and a bus state counter 32 for the incorporated peripheral bus and independently controlling an external bus cycle using the external bus 95 and an incorporated peripheral bus cycle using the incorporated peripheral bus 90.
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An Meng-Ai T.
NEC Corporation
Phan Raymond N.
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