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參數(shù)資料
| 型號： | M34551M8 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 單芯片4位CMOS微機(jī)紅外遙控器 |
| 文件頁數(shù)： | 12/68頁 |
| 文件大小： | 698K |
| 代理商： | M34551M8 |
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12
MITSUBISHI MICROCOMPUTERS
4551 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER for
INFRARED REMOTE CONTROL TRANSMITTER
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 Z, X, and Y. Set a
value to the data pointer certainly when executing an instruction
to access RAM.
RAM includes the area corresponding to the LCD. A segment is
turned on automatically when “1” is written in the bit
corresponding to the segment.
Table 2 shows the RAM size. Figure 12 shows the RAM map.
Table 2 RAM size
Product
M34551M4
M34551E8
RAM size
280 words
4 bits (1120 bits)
R
Register Z
Register X
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
0
1
7
RAM 280 words
4 bits (1120 bits)
2
3
6
15
280 words
0
1
2
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
The area marked “–” (Z = 1, X = 0 to 2, Y = 0 to 7) is not a memory area.
The numbers in the shaded area indicate the corresponding segment output pin numbers.
Notes 1:
2:
Fig. 12 RAM map
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