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GMS30004 датащи(PDF) 22 Page - Hynix Semiconductor

номер детали GMS30004
подробное описание детали  4-BIT SINGLE CHIP MICROCOMPUTERS
PDF  158 Pages
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производитель  HYNIX [Hynix Semiconductor]
домашняя страница  http://www.skhynix.com/kor/main.do
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GMS30004 датащи(HTML) 22 Page - Hynix Semiconductor

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2 - 3
Data memory (RAM)
Up to 32 nibbles (16 words
Ø 2pages Ø 4bits) is incorporated for storing data.
The whole data memory area is indirectly specified by a data pointer (X,Y). Page
number is specified by zero bit of X register, and words in the page by 4 bits in
Y-register. Data memory is composed in 16 nibbles/page. Figure 2.2 shows the
configuration.
0
1
2
3
15
Output port
Y-register (Y)
X-register (X)
D0
D9 R0
R3 REMOUT
Page 0
Page 1
01
4A0~A3
Data memory page (0~1)
X-register (X)
X-register is consist of 2bit, X0 is a data pointer of page in the RAM, X1 is only
used for selecting of D8~D9 with value of Y-register
Fig 2-2 Composition of Data Memory
Table 2-1 Mapping table between X and Y register
Chapter 2. Architecture
X1=1
X1=0
D8
D9
Y=0
Y=1
D1
D0
4
2



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