Renesas SH7641 - Manual (Page 998)

Section 25 Electrical Characteristics
Rev. 4.00 Sep. 14, 2005 Page 948 of 982
REJ09B0023-0400
Tc2 Tc3 Tc4 Tr Tpw Tp Tc1
t
AD1
t
CSD1
t
AD1
t
AD1
t
AD1
t
RWD1 t
RWD1
t
RWD1
t
RWD1
t
CSD1
t
RASD1
t
RASD1
t
RASD1
t
RASD1
t
AD1
t
AD1
t
AD1
t
AD1
Writecommand
Row address
t
AD1
t
AD1
Column
address
t
CASD1
t
CASD1
t
BSD
t
BSD
(High)
t
DQMD1
t
DQMD1
t
DACD
t
DACD
t
WDH2
t
WDD2
t
WDH2
t
WDD2
CKIO
A25 to A0
CSn
RD/ WR
A12/A11* 1
D31 to D0
RASU/L
CASU/L
BS
CKE
DQMxx
DACKn* 2
Note: 1. An address pin to be connected to pin A10 of SDRAM.
2. Waveform for DACKn when active low is selected.
Figure 25.36 Synchronous DRAM Burst Write Bus Cycle (Four Write Cycles)
(Bank Active Mode: PRE + ACT + WRITE Commands, Different Row Addresses,
WTRCD = 0 Cycle, TRWL = 0 Cycle)