Sdram Usage Example - Toshiba TX49 TMPR4937 Manual

9.6

SDRAM Usage Example

Figure 9.6.1 illustrates an example SDRAM connection. Figure 9.6.2 illustrates an example SDRAM
DIMM (168-pin) connection.
TX4937
DQM [7:0]
ADDR [19:5]
SDCS*[0]
RAS*
CAS*
WE*
SDCLKIN
SDCLK [0]
CKE
DATA [63:0]
TX4937
ADDR[19:5]
DQM[7:0]
SDCS[0]*
SDCS[1]*
RAS*
CAS*
WE*
CKE
SDCLKIN
SDCLK[0]
SDCLK[1]
SDCLK[2]
SDCLK[3]
DATA[63:0]
DQM [7] DQM [6]
UDQM LDQM
ADDR [17:5]
A [12:0]
ADDR [19]
BS0
ADDR [18]
BS1
CS*
RAS*
CAS*
WE*
CLK
CKE
DQ [15:0]
D [63:48]
Figure 9.6.1 SDRAM (×16 bits) Connection Example
ADDR[16:5]
ADDR[19]
ADDR[18]
Figure 9.6.2 168-pin DIMM Connection Example
9-42
Chapter 9 SDRAM Controller
SDRAM (×16 bits)
DQM [5] DQM [4] DQM [3] DQM [2]
UDQM LDQM UDQM LDQM
A [12:0] A [12:0]
BS0 BS0
BS1 BS1
CS* CS*
RAS* RAS*
CAS* CAS*
WE* WE*
CLK CLK
CKE CKE
DQ [15:0] DQ [15:0]
D [31:16]
D [47:32]
128MB unbuffer DIMM × 2
A[11:0] A[11:0]
BA0 BA0
BA1 BA1
DQMB[7:0] DQMB[7:0]
S0 S0
S1 S1
RAS* RAS*
CAS* CAS*
WE* WE*
CKE0
CKE1 CKE0
CKE1
CK0 CK0
CK1 CK1
DQ[63:0] DQ[63:0]
DQM [1] DQM [0]
UDQM LDQM
A [12:0]
BS0
BS1
CS*
RAS*
CAS*
WE*
CLK
CKE
DQ [15:0]
D [15:0]