Renesas SH7781 User Manual
Page 492
12. DDR2-SDRAM Interface (DBSC2)
Rev.1.00 Jan. 10, 2008 Page 462 of 1658
REJ09B0261-0100
Table 12.2 An Example of DDR2-SDRAM Connection
(When Four 2-Gb DDR2-SDRAM Units (256 M
× 8 Bits) Are Used)
Memory
MCK1,
MCK1
MCK0,
MCK0
MODT,
MCKE,
MCS,
MRAS,
MCAS,
MWE, MA14
to MA0,
MBA2 to
MBA0
MDQ31 to
MDQ24,
MDQS3,
MDQS3,
MDM3
MDQ23 to
MDQ16,
MDQS2,
MDQS2,
MDM2
MDQ15 to
MDQ8,
MDQS1,
MDQS1,
MDM1
MDQ7 to
MDQ0,
MDQS0,
MDQS0,
MDM0
Memory #1
Connected*
1
Connected*
2
Connected*
3
Memory #2
Connected*
1
Connected*
2
Connected*
4
Memory #3
Connected*
1
Connected*
2
Connected*
5
Memory #4
Connected*
1
Connected*
2
Connected*
6
Notes: 1. SDRAM pins should be connected as shown below.
Memory #1 and #2
Pins SH7785
Pins
Memory #3 and #4
Pins SH7785
Pins
CK MCK1 CK MCK0
CK MCK1 CK MCK0
2. SDRAM pins should be connected as shown below.
Memory #1 to #4
Pins SH7785
Pins
Memory #1 to #4
Pins SH7785
Pins
ODT MODT
A8 MA8
CKE MCKE
A7 MA7
CS MCS
A6 MA6
RAS MRAS
A5 MA5
CAS MCAS
A4 MA4
WE MWE
A3 MA3
A14 MA14
A2 MA2
A13 MA13
A1 MA1
A12 MA12
A0 MA0
A11 MA11
BA2
MBA2
A10 MA10
BA1
MBA1
A9 MA9
BA0
MBA0