SH7751 Datasheet, PDF (1146/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

23. Electrical Characteristics
CKIO
Address
CSn
RD/WR
Tnop Tc1
Tc2
Tc1
Tc2
Tc1
t_AD
c1
c2
RAS
CASn
t_CASD1
t_CASD1
D31–D0
(read)
D31–D0
(write)
t_WDD
t_RDS
t_RDH
d1
d2
t_WDD
d1
d2
t_BSD t_BSD
BS
DACKn
(SA: IO ← memory)
DACKn
(SA: IO → memory)
t_DACD
t_DACD
t_DACD
t_DACD
Tc2
Tc1
Tc2
t_AD
c8
t_CSD
t_RWD
RAS down
mode ended
t_RASD
t_CASD1
t_CASD1
t_RDS
d8
t_RDH
d8
t_WDD
Legend:
IO: DACK device
SA: Single address DMA transfer
DA: Dual address DMA transfer
DACK set to active-high
Figure 23.46 DRAM Burst Bus Cycle: RAS Down Mode Continuation
(Fast Page Mode, RCD [1:0] = 00, AnW [2:0] = 000)
Rev.4.00 Oct. 10, 2008 Page 1048 of 1122
REJ09B0370-0400