M30622 Mitsubishi, M30622 Datasheet - Page 25
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M30622
Manufacturer Part Number
M30622
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
Mitsubishi
Datasheet
1.M30622.pdf
(184 pages)
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Memory Space Expansion Functions
Figure 1.8.5. Memory location and chip select area in expansion mode 2
Figure 1.8.4. Data bank register
(3) Expansion mode 2
In expansion mode 2, the data bank register (0000B
register.
XXXXX
YYYYY
FFFFF
Tentative Specifications REV.A
04000
08000
28000
40000
D0000
Expansion mode 2 (memory space = 4M bytes for PM15 = 1, PM14 = 1)
00000
00400
M30623M4T-XXXGP
M30622M8T/M8V-XXXFP
M30623M8T/M8V-XXXGP
M30622MCT/MCV-XXXFP
M30623MCT/MCV-XXXGP
Data bank register
b7
S
pecifications in this manual are tentative and subject to change.
b6
16
16
16
16
16
16
16
16
16
16
Type No.
b5
Internal area reserved
Internal area reserved
Internal ROM area
Internal RAM area
expansion mode
b4
External area
Memory
SFR are
b3
b2
a
b1
XXXXX
b0
00FFF
013FF
017FF
Internal area reserved
Bit symbol
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Internal RAM area
16
16
16
Microprocessor
16
BSR
OFS
External area
Symbol
SFR area
YYYYY
E0000
F8000
F0000
DBR
mode
16
16
16
16
Bank selection bits
Offset bit
Note 1. M30623(80-pin package) is not provided with the
Note 2. The M16C/62T group is not guaranteed to operate
Note 3. The memory maps in single-chip mode are omitted.
CS3
CS2
CS1
Bit name
CS0
Memory expansion mode:
Microprocessor mode:
Address
512K bytes x 7banks +
256K bytes
000B
25
512K bytes x 8banks
output pin for the chip select signal.
in memory expansion and microprocessor modes.
(128K bytes)
(16K bytes)
(96K bytes)
16
16
) goes effective. Figure 1.8.4 shows the data bank
When reset
b5 b4 b3
0: Not offset
1: Offset
0 0 0: Bank 0
0 1 0: Bank 2
1 0 0: Bank 4
1 1 0: Bank 6
00
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Addresses from 40000
Addresses from C0000
Bank number is output to CS3 to CS1
16
Bank 7 in fetching a program
A bank selected by use of the bank selection
bits in accessing data
Bank 7 invariably
Description
b5 b4 b3
0 0 1: Bank 1
0 1 1: Bank 3
1 0 1: Bank 5
1 1 1: Bank 7
Mitsubishi microcomputers
16
16
M16C / 62T Group
through BFFFF
through FFFFF
R
W
16
16