Title:
SEMICONDUCTOR DEVICE, CONTROL SYSTEM, AND SEMICONDUCTOR DEVICE CONTROLLING METHOD
Document Type and Number:
Japanese Patent JP2020004108
Kind Code:
A
Abstract:
To realize a software lock step of a semiconductor device without adding hardware for the lock step.SOLUTION: A semiconductor device 2 includes CPUs 10 and 20, SPUs 210 and 220 for controlling a snoop operation, a CPU 230 having the highest level (ASIL D) of the functional safety standards, an arbiter 250, a memory 260, and a comparator. The CPU 230 permits the snoop operation when a normal operation is performed, and prohibits the snoop operation when a software lock step is performed. The CPU 10 executes first software for the software lock step and writes an execution result in a first area 262 secured in the memory 260. The CPU 20 executes second software for the software lock step, and writes an execution result in a second area 263. The comparator compares the execution result written in the first area with the execution result written in the second area.SELECTED DRAWING: Figure 2
Inventors:
HAYAKAWA YUKI
KAYA TOSHIYUKI
SHIBAHARA SHINICHI
KAYA TOSHIYUKI
SHIBAHARA SHINICHI
Application Number:
JP2018123381A
Publication Date:
January 09, 2020
Filing Date:
June 28, 2018
Export Citation:
Assignee:
RENESAS ELECTRONICS CORP
International Classes:
G06F15/167; G06F11/18
Domestic Patent References:
| JP2009505177A | 2009-02-05 |
Foreign References:
| WO2016169856A1 | 2016-10-27 |
Attorney, Agent or Firm:
Fukami patent office