SH7641 Datasheet, PDF (987/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

Section 25 Electrical Characteristics
CKIO
A25 to A0
A12/A11*¹
CSn
RD/WR
RASU/L
CASU/L
DQMxx
D31 to D0
BS
Td1 Td2 Td3
Td4
Tr
TC1 TC2 Tc3 Tc4
Tde
t_AD1
t_AD1
Row
address
t_AD1
t_AD1
Column
address
t_AD1
t_AD1
Read command
t_AD1
(1 to 4)
t_AD1
t_AD1
ReadA
command
t_CSD1
t_AD1
t_CSD1
t_RWD1
t_RASD1 t_RASD1
t_CASD1
t_DQMD1
t_RWD1
t_CASD1
t_DQMD1
t_BSD
t_RDS2 t_RDH2
t_BSD
t_RDS2 t_RDH2
CKE
DACKn*²
t_DACD
(High)
t_DACD
Note: 1. An address pin to be connected to pin A10 of SDRAM.
2. Waveform for DACKn when active low is selected.
Figure 25.25 Synchronous DRAM Burst Read Bus Cycle (Four Read Cycles)
(Auto Precharge, CAS Latency 2, WTRCD = 0 Cycle, WTRP = 1 Cycle)
Rev. 4.00 Sep. 14, 2005 Page 937 of 982
REJ09B0023-0400