EP7212 Datasheet, PDF (107/136 Pages) Cirrus Logic – HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)

EP7212
EXPCLK
DRA[12:0]
RAS0
CAS[3:0]
t_VACC
ROW
COL0 COL1
COL2
COL3
t_RP
t_CAS t_CP
t_PC
D[31:0]
0
1
2
3
NOTES:
Figure 20. Video Quad Word Read from DRAM at 13 MHz and 18 MHz
1). Timings are the same as page mode word reads
2) t_VACC (video access cycle time) = 326 ns at EXPCLK = 18.432 MHz and 462 ns at 13 MHz
EXPCLK
DRA[12:0]
NRAS[1:0]
NCAS[3:0]
D[31:0]
ROW
COL0 COL1 COL2 COL3
t_RP
T_VAC
t_CAS t_{CP tPC}
1
2
3
4
NOTES:
Figure 21. Quad Word Read from DRAM at 36 MHz
1). Timings are the same as page mode word reads
2) t_VACC (video access cycle time) = 220 ns at EXPCLK = 36 MHz
3) The filled-in grey areas are don’t cares.
DS474PP1
107