MB86290A Datasheet, PDF (167/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

8.2.7 Delay between Refresh Command and Next ACTV Command
MCLKO
MRAS
TRC
MCAS
MWE
MA
ROW: Row Address
TRC: RAS Cycle Time
ROW
Fig. 8.2.7 Delay between Refresh Command and next ACTV Command
The ACTV command is issued after TRC has elapsed after the Refresh
command is issued.
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