M30622ECTFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622ECTFP Datasheet - Page 22

• Manufacturer Part Number: M30622ECTFP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Memory Space Expansion Functions
Memory Space Expansion Features
Table 1.8.1. The way of setting memory space expansion modes and corresponding memory spaces
Figure 1.8.1. The memory maps and the chip select areas in normal mode
Here follows the description of the memory space expansion function.
With the processor running in memory expansion mode or in microprocessor mode, the memory space
expansion features provide the means of expanding the accessible space. The memory space expansion
features run in one of the three modes given below.
Use bits 5 and 4 (PM15, PM14) of processor mode register 1 to select a desired mode. The external
memory area the chip select signal indicates is different in each mode so that the accessible memory space
varies. Table 1.8.1 shows how to set individual modes and corresponding accessible memory spaces. For
external memory area the chip select signal indicates, see Table 1.12.1 on page 33.
But M30623 (80-pin package) is not provided with the output pin for the chip select signal. And, the M16C/62T group
is not guaranteed to operate in memory expansion and microprocessor modes.
Here follows the description of individual modes.
(1) Normal mode (a mode with memory not expanded)
Normal mode (no expansion)
Expansion mode 1
Expansion mode 2
‘Normal mode’ means a mode in which memory is not expanded.
Figure 1.8.1 shows the memory maps and the chip select areas in normal mode.
(1) Normal mode (no expansion)
(2) Memory space expansion mode 1 (to be referred as expansion mode 1)
(3) Memory space expansion mode 2 (to be referred as expansion mode 2)
Tentative Specifications REV.A
XXXXX
YYYYY
FFFFF
D0000
S
00000
00400
04000
08000
28000
30000
Expansion mode
pecifications in this manual are tentative and subject to change.
16
16
16
16
16
16
16
16
16
16
Normal mode (memory area = 1M bytes for PM15 = 0, PM14 = 0)
Note 1. M30623(80-pin package) is not provided with the output pins for chip select signals.
Note 2. The M16C/62T group is not guaranteed to operatein memory expansion and microprocessor modes.
Note 3. The memory maps in single-chip mode are omitted.
Memory expansion mode
Internal area reserved
Internal area reserved
Internal RAM area
Internal ROM area
External area
SFR area
How to set PM15 and PM14
Microprocessor mode
Internal area reserved
Internal RAMarea
External area
0, 0
1, 0
1, 1
SFR area
22
CS0
CS3
CS2
CS1
Memory expansion mode: 640K bytes
Microprocessor mode: 832K bytes
M30622M8T/M8V-XXXFP
M30623MCT/MCV-XXXGP
M30623M4T-XXXGP
M30623M8T/M8V-XXXGP
M30622MCT/MCV-XXXFP
(16K bytes)
(128K bytes)
(32K bytes)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Type No.
Accessible memory space
Up to 1M byte
Up to 1.2M bytes
Up to 4M bytes
Mitsubishi microcomputers
XXXXX
00FFF
013FF
017FF
M16C / 62T Group
16
16
16
16
YYYYY
E0000
F8000
F0000
16
16
16
16