CHAPTER 5 MEMORY ACCESS CONTROL FUNCTION
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User’s Manual U14359EJ4V0UM
5.1.2 SRAM
connection
Examples of connection to SRAM are shown below.
Figure 5-1. Examples of Connection to SRAM (1/2)
(a) When data bus width is 8 bits
A0 to A16
D1 to D8
1 Mb SRAM
(128 Kwords
×
8 bits)
CS
OE
WE
A1 to A17
D0 to D7
CSn
RD
LWR
D8 to D15
V850E/MA1
UWR
A0 to A16
D1 to D8
1 Mb SRAM
(128 Kwords
×
8 bits)
CS
OE
WE
(b) When data bus width is 16 bits
2 Mb SRAM
(256 Kwords
×
16 bits)
A1 to A17
A0 to A16
V850E/MA1
D0 to D15
D1 to D16
CSn
CS
LWR
UWR
UWR
LBE
LBE
LBE
UBE
UBE
RD
OE
WE
Remark
n = 0 to 7