Renesas M32R/ECU Series User Manual page 674

15
(2) When the Bus Mode Control Register = "1"
A typical memory connection when using external extension memory is shown in Figure 15.5.2. (External
extension memory can only be used in external extension mode and processor mode.)
M32180F8
A11
A30
D0
D15
RD#
CS0#
BHE#
BLE#
CS1#
WR#
WAIT#
CS2#
CS3#
Figure 15.5.2 Typical Connection of External Extension Memory (when BUSMOD bit = "1")
Note: • The address and data are connected in such a way that pin 0 is the MSB and pin 15 is the LSB.
When connecting external extension memory, connections of the MSB and LSB sides must be
reversed.
15.5 Typical Connection of External Extension Memory
Flash memory
A18
A0
D15
max1MB
D0
RD#
CS#
SRAM
A19
A0
D15
max2MB
D0
BHE#(D0-D7)
BLE#(D8-D15)
RD#(D0-D15)
CS#
WR#(D0-D15)
Number of bus wait states can be set to 0-7.
Normally used as port. WAIT is used only when seven or more wait states are needed.
EXTERNAL BUS INTERFACE
H'0000 0000
Internal flash memory
H'000F FFFF
H'0010 0000
External memory area
H'0020 0000
External memory area
H'0040 0000
15-19
Memory mapping
(1024KB)
1M-CS0 area
(1MB)
(2MB)
2M-CS1 area
32180 Group User's Manual (Rev.1.0)