M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 534

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

External Buses
Figure 5.3.8. 2-Mbyte ROM and 256-Kbyte SRAM Connection Example
(2)2-Mbyte ROM and 256-Kbyte SRAM Connection Example
Enter the signal decoded from outputs CS0 and CS3 to the 2-Mbyte ROM’s chip enable pin. Connect CS1
and CS2 to the address pins A19 and A20. Connect the M16C’s A19 to the 2-Mbyte ROM’s A18, leaving
the M16C’s A18 unused.
Enter the signal decoded from outputs CS0 and CS3 to the 256-Kbyte SRAM’s chip enable pin.
Access areas in 2-Mbyte ROM and 256-Kbyte SRAM with regard to M16C settings are shown in Table
5.3.2.
Figure 5.3.8 shows how to connect 2-Mbyte ROM and 256-Kbyte SRAM in microprocessor mode. Locate
both the 2-Mbyte ROM and 256-Kbyte SRAM in the CS0 area that has been extended in memory space
extension mode 2.
Specifically, locate the 2-Mbyte ROM in the area comprised of banks 4 though 7 and the 256-Kbyte
SRAM in the area of bank 0.
_______
CNVss
BYTE
M16C/62
A0 to A19
D0 to D7
CS0
CS1
CS2
CS3
WR
RD
CS3
CS0
A16
WR
RD
256K bytes SRAM
A0
to
_______
_______
A1
A0
S1
S2
OE
W
to
_______
DQ1
DQ8
_______
to
D0
D7
to
CS3
CS0
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
A17 to A0
CS2
CS1
A19
RD
2M bytes ROM
CE
OE
A20
A19
A18
A17 to A0
DQ0
DQ7
to
Mitsubishi microcomputers
M16C / 62 Group
D0
D7
to
_______
519