r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 496

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

12. DDR2-SDRAM Interface (DBSC2)
Rev.1.00 Jan. 10, 2008 Page 466 of 1658
REJ09B0261-0100
32-bit width: MDQS[3:0]
16-bit width: MDQS[1:0]
32-bit width: MDM[3:0]
16-bit width: MDM[1:0]
32-bit width: MDQ[31:0]
16-bit width: MDQ[15:0]
Example of CL = 3
MCK0,
MCK1
MCKE
MCS
MRAS
MCAS
MWE
MA[14:11]
MA[9:0]
MA[10]
MBA[2:0]
SDRAM
command
Invalid
Invalid
Invalid
WRITE
bank A
Invalid
Invalid
Valid
Valid
Valid
Figure 12.2 Burst Access Operation
High level
1
Write data
st
Invalid
Invalid
Invalid
2
nd
3
rd
4
th
bank A
READ
Valid
Valid
Valid
Invalid
Invalid
1
Read data
Invalid
Invalid
Invalid
st
2
nd
3
rd
4
th
Invalid