MB86391 Datasheet, PDF (46/69 Pages) Fujitsu Component Limited. – MPEG2 1chip Audio/Video Encoder

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3.8 Boot Operations
The MB86391 starts booting operations when the internal controller starts the boot program of the internal
ROM. The program required for the operation is downloaded to the SDRAM interface connected to the
host/SDRAM according to the processing flow in Fig. 3.8. Each downloading procedure is described in the next
and subsequent chapters.
Start boot
Initialize
Check external
ROM keyword
Keyword OK?
NO
Check serial API
YES
External ROM download
Data exists?
NO
YES
Check parallel API
Serial download
Startup request?
NO
YES
Immediately start
SDRAM.
Fig. 3.8: Booting flow
MB86391
Product Specification
Rev. 1.1
12, November 2001
42