Title:
MICRO COMPUTER
Document Type and Number:
Japanese Patent JPH01201762
Kind Code:
A
Abstract:
PURPOSE:To attain backup when noncomformity occurs in one branch program by providing two kinds of addresses which branch at the time of reset input, and providing a selecting circuit which designates one of the addresses. CONSTITUTION:When a reset signal is inputted, an input terminal voltage detection circuit 1 decides the voltage level of a selection input terminal 3, and outputs a signal having the same voltage level as said voltage level to a vector table selection circuit 4. The vector table selection circuit 4 outputs a table A selection signal 7 or a table B selection signal 8 in correspondence with an input level. Thus, either of a reset vector table A5 or a reset vector table 6 is selected and branch for respectively corresponding branch destinations is executed.
Inventors:
MATSUBARA SHOJI
Application Number:
JP2643288A
Publication Date:
August 14, 1989
Filing Date:
February 05, 1988
Export Citation:
Assignee:
NEC CORP
International Classes:
G06F9/06; G06F11/14; G06F15/78; (IPC1-7): G06F9/06; G06F11/14; G06F15/06
Domestic Patent References:
| JPS5854418A | 1983-03-31 |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)