M34282E2GP MITSUBISHI [Mitsubishi Electric Semiconductor], M34282E2GP Datasheet - Page 9

• Manufacturer Part Number: M34282E2GP
• Description: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

PROGRAM MEMORY (ROM)
The program memory is a mask ROM. 1 word of ROM is
composed of 9 bits. ROM is separated every 128 words by the
unit of page (addresses 0 to 127).
Table 1 ROM size and pages
Page 2 (addresses 0100
subroutine calls. Subroutines written in this page can be called
from any page with the 1-word instruction (BM). Subroutines
extending from page 2 to another page can also be called with
the BM instruction when it starts on page 2.
ROM pattern of all addresses can be used as data areas with
the TABP p instruction.
DATA MEMORY (RAM)
1 word of RAM is composed of 4 bits, but 1-bit manipulation
(with the SB j, RB j, and SZB j instructions) is enabled for the
entire memory area. A RAM address is specified by a data
pointer. The data pointer consists of registers X and Y. Set a
value to the data pointer certainly when executing an instruction
to access RAM.
Table 2 shows the RAM size. Figure 11 shows the RAM map.
Table 2 RAM size
M34282M2/E2
M34282M2/E2
M34282M1
M34282M1
Product
Product
ROM size (
2048 words
1024 words
16
64 words
48 words
to 017F
9 bits)
RAM size
16
) is the special page for
4 bits (256 bits)
4 bits (192 bits)
16 (0 to 15)
8 (0 to 7)
Pages
MITSUBISHI
ELECTRIC
Fig. 10 ROM map of M34282M2/E2
Fig. 11 RAM map
0000
007
0080
0100
017
0180
07
00
FF
FF
F
F
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
16
16
16
16
16
16
16
16
RAM 64 words
8 7 6
Subroutine special page
Register X
MITSUBISHI MICROCOMPUTERS
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
5 4 3
4 bits (256 bits)
0 1
M34282M2/E2
64 words
2 1
2 3
4282 Group
0
Page 0
Page 1
Page 2
Page 3
Page 15
48 words
M34282M1
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