Hardware Description and Board Operation
MOTOROLA
M68VZ328ADS USER’S MANUAL
3-21
3.6.3 SDRAM
Figure 3-3. shows the interface of SDRAMs. M68VZ328ADS supports two banks of 4Mx16-
bit SDRAMs. However, only one bank is installed when the board is shipped out from the
factory. This allows user to install and test their own SDRAM when needed. These two
banks of SDRAM are selected by *CSD0 and *CSD1, and enabled by closing DIP switches
S2-4 and S2-5.
CSC0
CSC1
DQMH
SDWE
A[1..20]
D[0..15]
CSD1
SDCE
SDCLK
DQML
RAS
CAS
UDQM
WE
A[1..12], BS0,BS1
D[0..15]
4MX16-Bit SDRAM
CS
CLK
CKE
LDQM
CS
4MX16-Bit SDRAM
CSD0
S2-5
S2-4
VCC
VCC
MC68VZ328
SDRAM0
SDRAM1
Figure 3-3. Interface of SDRAMs
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc.
..