Datasheet

Rev.6.00 Mar. 18, 2009 Page xli of lviii
REJ09B0050-0600
Figure 6.19 Example of Timing when Chip Select Assertion Period is Extended .................... 164
Figure 6.20 DRAM Basic Access Timing (RAST = 0, CAST = 0)........................................... 168
Figure 6.21 Example of Access Timing with 3-State Column Address Output Cycle
(RAST = 0)............................................................................................................. 169
Figure 6.22 Example of Access Timing when RAS Signal Goes Low from Beginning
of T
r
State (CAST = 0) ........................................................................................... 170
Figure 6.23 Example of Timing with One Row Address Output Maintenance State
(RAST = 0, CAST = 0) .......................................................................................... 171
Figure 6.24 Example of Timing with Two-State Precharge Cycle (RAST = 0, CAST = 0)...... 172
Figure 6.25 Example of Wait State Insertion Timing (2-State Column Address Output) ........ 174
Figure 6.26 Example of Wait State Insertion Timing (3-State Column Address Output) ......... 175
Figure 6.27 2-CAS Control Timing (Upper Byte Write Access: RAST = 0, CAST = 0)......... 176
Figure 6.28 Example of 2-CAS DRAM Connection ................................................................. 177
Figure 6.29 Operation Timing in Fast Page Mode (RAST = 0, CAST = 0) .............................. 178
Figure 6.30 Operation Timing in Fast Page Mode (RAST = 0, CAST = 1) .............................. 179
Figure 6.31 Example of Operation Timing in RAS Down Mode (RAST = 0, CAST = 0)........ 180
Figure 6.32 Example of Operation Timing in RAS Up Mode (RAST = 0, CAST = 0)............. 181
Figure 6.33 RTCNT Operation.................................................................................................. 182
Figure 6.34 Compare Match Timing ......................................................................................... 183
Figure 6.35 CBR Refresh Timing.............................................................................................. 183
Figure 6.36 CBR Refresh Timing (RCW1 = 0, RCW0 = 1, RLW1 = 0, RLW0 = 0)................ 184
Figure 6.37 Example of CBR Refresh Timing (CBRM = 1) ..................................................... 185
Figure 6.38 Self-Refresh Timing............................................................................................... 186
Figure 6.39 Example of Timing when Precharge Time after Self-Refreshing Is Extended
by 2 States .............................................................................................................. 187
Figure 6.40 Example of DACK Output Timing when DDS = 1 (RAST = 0, CAST = 0) ......... 188
Figure 6.41 Example of DACK Output Timing when DDS = 0 (RAST = 0, CAST = 1) ......... 189
Figure 6.42 Example of Burst ROM Access Timing (ASTn = 1, 2-State Burst Cycle) ............ 191
Figure 6.43 Example of Burst ROM Access Timing (ASTn = 0, 1-State Burst Cycle) ............ 192
Figure 6.44 xample of Idle Cycle Operation (Consecutive Reads in Different Areas).............. 193
Figure 6.45 Example of Idle Cycle Operation (Write after Read)............................................. 194
Figure 6.46 Example of Idle Cycle Operation (Read after Write)............................................. 195
Figure 6.47 Relationship between Chip Select (CS) and Read (RD)......................................... 196
Figure 6.48 Example of DRAM Full Access after External Read (CAST = 0)......................... 196
Figure 6.49 Example of Idle Cycle Operation in RAS Down Mode (Consecutive Reads
in Different Areas) (IDLC = 0, RAST = 0, CAST = 0).......................................... 197
Figure 6.50 Example of Idle Cycle Operation in RAS Down Mode (Write after Read)
(IDLC = 0, RAST = 0, CAST = 0)......................................................................... 198
Figure 6.51 Example of Idle Cycle Operation after DRAM Access (Consecutive Reads in
Different Areas) (IDLC = 0, RAST = 0, CAST = 0).............................................. 199