M30622 Mitsubishi, M30622 Datasheet - Page 23

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

Memory Space Expansion Functions
Figure 1.8.2. Memory location and chip select area in expansion mode 1
(2) Expansion mode 1
In this mode, the memory space can be expanded by 176K bytes in addition to that in normal mode.
Figure 1.8.2 shows the memory location and chip select area in expansion mode 1.
In accessing data in expansion mode 1, CS3, CS2, and CS1 go active in the area from 04000
2FFFF
area from 04000
and fetching a program (CS0).
XXXXX
YYYYY
FFFFF
D0000
Tentative Specifications REV.A
00000
00400
04000
08000
28000
30000
Expansion mode 1 (memory space = 1.2M bytes for PM15 = 1, PM14 = 0)
M30623M4T-XXXGP
M30622M8T/M8V-XXXFP
M30623M8T/M8V-XXXGP
M30622MCT/MCV-XXXFP
M30623MCT/MCV-XXXGP
S
16
pecifications in this manual are tentative and subject to change.
16
16
16
16
16
16
16
16
16
16
; in fetching a program, CS0 goes active. That is, the address space is expanded by using the
Internal area reserved
expansion mode
Type No.
Internal area reserved
Internal RAM
External area
Internal ROM
SFR area
Memory
area
area
16
through 2FFFF
_______
XXXXX
00FFF
013FF
017FF
Internal area reserved
16
16
16
Microprocessor
16
Internal RAM
SFR area
_______
External
YYYYY
E0000
area
F8000
F0000
area
16
mode
(176K bytes) appropriately for accessing data (CS3, CS2, CS1)
16
16
16
16
_______ _______
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.
Memory expansion
mode:
Microprocessor mode:
CS3
CS2
CS1
23
output pin for the chip select signal.
in memory expansion and microprocessor modes.
(16K bytes)
(32K bytes)
(128 Kbytes)
816K bytes
1008K bytes
_______
CS0
04000
2FFFF
CS0:active in fetching a program
CS1, CS2, CS3:active in accessing data
30000
FFFFF
CS0:active both in fetching a program
to
to
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
and in accessing data
16
16
16
16
176K bytes
= the extent of memory expanded
Mitsubishi microcomputers
M16C / 62T Group
________
_______
16
through
_______