CHAPTER 5 MEMORY ACCESS CONTROL FUNCTION
160
User’s Manual U14359EJ4V0UM
5.3.2 DRAM connection
Examples of connection to DRAM are shown below.
Figure 5-6. Examples of Connection to DRAM
(a) When DRAM is 64 Mb (4 M
××××
16 bits)
A0 to A11
I/O1 to I/O16
RAS
LCAS
UCAS
WE
OE
64 Mb DRAM
(4 Mwords
×
16 bits)
A1 to A12
D0 to D15
RASn
LCAS
UCAS
WE
OE
V850E/MA1
(b) When DRAM is 16 Mb (2 M
××××
8 bits)
A0 to A11
I/O1 to I/O8
RAS
CAS
WE
OE
16 Mb DRAM
(2 Mwords
×
8 bits)
A1 to A12
D0 to D7
RASn
LCAS
WE
OE
D8 to D15
V850E/MA1
A0 to A11
I/O1 to I/O8
RAS
CAS
WE
OE
16 Mb DRAM
(2 Mwords
×
8 bits)
UCAS
Remark
n = 1, 3, 4, 6