M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 532
M30622MA-XXXFP
Manufacturer Part Number
M30622MA-XXXFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.M30622MA-XXXFP.pdf
(621 pages)
- Current page: 532 of 621
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External Buses
Figure 5.3.6. 4-Mbyte ROM and 128-Kbyte SRAM Connection Example
(1)4-Mbyte ROM and 128-Kbyte SRAM Connection Example
Figure 5.3.6 shows how to connect 4-Mbyte ROM and 128-Kbyte SRAM in microprocessor mode. Locate
the 4-Mbyte ROM in the CS0 area that has been extended in memory space extension mode 2 and the
128-Kbyte SRAM in the CS2 area.
Connect CS0 to the 4-Mbyte ROM’s chip enable pin and CS1, CS2, and CS to the address pins A19, A20,
and A21, respectively. Connect the M16C’s A19 to the 4-Mbyte ROM’s A18, leaving the M16C’s A18
unused.
In the above diagram, an SRAM with two chip select signal inputs is used. When using memory with only
one chip select signal input, you need to have an external circuit to decode the address.
Addresses in 4-Mbyte ROM with regard to M16C settings are shown in Table 5.3.1.
CNVss
BYTE
M16C/62
A0 to A19
D0 to D7
CS0
CS1
CS2
CS3
WR
RD
______
_______
CS2
CS0
A16
WR
RD
A0
to
128K bytes SRAM
S1
S2
OE
W
A16
to
A0
DQ1
DQ8
to
______
D0
to
D7
______
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
A17 to A0
CS0
CS3
CS2
CS1
A19
RD
4M bytes ROM
A21
A20
A19
A18
A17 to A0
CE
OE
DQ0
DQ7
Mitsubishi microcomputers
M16C / 62 Group
to
D0
D7
to
517
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