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4570 Datasheet(PDF) 13 Page - Renesas Technology Corp

Part # 4570
Description  SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
PDF  69 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

4570 Datasheet(HTML) 13 Page - Renesas Technology Corp

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12
MITSUBISHI MICROCOMPUTERS
4570 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
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.
Table 2 shows the RAM size. Figure 12 shows the RAM map.
Table 2 RAM size
RAM size
128 words ! 4 bits (512 bits)
Fig. 12 RAM map
Product
M34570Mx
M34570Ex
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 128 words ! 4 bits (512 bits)
23
6
128 words
...



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