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MB86R02 'Jade-D' Hardware Manual V1.64
21 Signature Generator (SIG)
21.1 Position of Block in whole LSI
21.2 Overview
The Signature Generator unit (SIG) calculates different types of checksums for input data. Application
is the generation of a checksum (signature) for pixel stream data for a user-defined evaluation window
(whose size and position can be programmed).
The system micro controller can use such signatures e.g. to determine whether the displayed image is
exactly identical (or almost identical) to the original image data submitted. This is necessary for critical
safety displays and helps to fulfil the requirements of safety standards (e.g. Automotive Safety
Integrity Level ASIL).
21.3 Feature List
•
Generation of 2 different picture signatures for each color channel
- summation of color values
- CRC-32 for color values
•
Programmable evaluation window position and size
•
Programmable evaluation window mask
•
Automatic monitoring using reference signature registers
•
Interrupt generation
•
Programmable picture source
•
Self restoring error counter
Figure 21-1 Location of the SIG unit in the GDC
21-1
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