r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 507

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Figure 12.3 Addresses Generated upon 16/32-Byte Access when the External Data Bus
When the external bus width is set to 16 bits
16-byte read/write access (a total of two commands are issued)
32-byte read access (a total of four commands are issued)
32-byte write access (a total of four commands are issued)
Address 16n + 0
Address 16n + 8
Address 32n + 0
Address 32n + 8
Address 32n + 16
Address 32n + 24
Address 32n + 0
Address 32n + 8
Address 32n + 16
Address 32n + 24
1st access
1st access
1st access
16n + 0
16n + 8
32n + 0
32n + 0
32n + 16
32n + 16
32n + 0
32n + 16
32n + 16
32n + 0
Width Is 16 Bits
2nd access
2nd access
2nd access
16n + 8
16n + 0
32n + 8
32n + 8
32n + 24
32n + 24
32n + 8
32n + 24
32n + 24
32n + 8
Rev.1.00 Jan. 10, 2008 Page 477 of 1658
3rd access
3rd access
32n + 16
32n + 16
32n + 0
32n + 0
32n + 16
32n + 0
32n + 0
32n + 16
12. DDR2-SDRAM Interface (DBSC2)
4th access
4th access
32n + 24
32n+ 24
32n + 8
32n + 8
32n + 24
32n + 8
32n + 8
32n + 24
REJ09B0261-0100