MB86293 Datasheet, PDF (254/285 Pages) Fujitsu Component Limited. – Grraphiics Conttrrollllerr Speciiffiicattiions

FUJITSU LIMITED
PRELIMINARY and CONFIDENTIAL
11.2 G r a p h i c s M e m o r y I n t e r f a c e
The CORAL access timing and graphics memory access timing are explained here.
11.2.1 Timing of read access to same row address
MCLKO
MRAS
MCAS
TRCD
MWE
MA
ROW
MD
DQM
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. 10.19 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.
MB86293 CORAL_LQ
Graphics Controller
254
Specifications Rev. 1.1