MB86296 Datasheet, PDF (317/352 Pages) Fujitsu Component Limited. – PCI Graphics Controller Specification

FUJITSU LIMITED PRELIMINARY AND CONFIDENTIAL
14.3 Graphics Memory Interface
The CORAL access timing and graphics memory access timing are explained here.
14.3.1 Timing of read access to same row address
MCLKO
MRAS
MCAS
MWE
MA
MD
DQM
TRCD
ROW
COL COL COL COL
CL
DATA DATA DATA DATA
ROW: Row Address
COL: Column Address
DATA: READ DATA
TRCD: RAS to CAS Delay Time
CL: CAS Latency
*Timing when CL2 operating
Fig. 11.3 Timing of Read Access to Same Row Address
The above timing diagram shows that read access is made four times from CORAL to the same
row address of SDRAM. The ACTV command is issued and then the READ command is issued
after TRCD elapses. Then data that is output after the elapse of CL after the READ command is
issued is captured into CORAL.
MB86296S <Coral-PA>
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Specification Manual Rev0.1