SH7641 Datasheet, PDF (1026/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

Item
Page Revisions (See Manual for Details)
Section 25 Electrical
Characteristics
Figure 25.37 Synchronous
DRAM Auto-Refreshing
Timing
949 to
951
and
953
(WTRP = 1 Cycle, WTRC =
3 Cycles)
D31 to D0
(Hi-Z)*³
Note: 1. An address pin to be connected to pin A10 of SDRAM.
2. Waveform for DACKn when active low is selected.
3. Pins D31 to D16 with weak keeper are retained as weak keepers.
Figure 25.38 Synchronous
DRAM Self-Refreshing
Timing
(WTRP = 1 Cycle)
Figure 25.39 Synchronous
DRAM Mode Register
Write Timing (WTRP = 1
Cycle)
Figure 25.41 Synchronous
DRAM Self-Refreshing
Timing in Low-Frequency
Mode
(WTRP = 2 Cycles)
Rev. 4.00 Sep. 14, 2005 Page 976 of 982
REJ09B0023-0400