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GMS36 датащи(PDF) 36 Page - Hynix Semiconductor

номер детали GMS36
подробное описание детали  4-BIT SINGLE CHIP MICROCOMPUTERS
PDF  109 Pages
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производитель  HYNIX [Hynix Semiconductor]
домашняя страница  http://www.skhynix.com/kor/main.do
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GMS36 датащи(HTML) 36 Page - Hynix Semiconductor

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4-3
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.
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
X1=1
X1=0
D8
D9
Y=0
Y=1
D1
D0
Table 4-1 Mapping table between X and Y register
Chapter 4. FUNCTIONAL DESCRIPTION
0
1
2
3
15
Output port
Y-register (Y)
X-register (X)
D0
D9 R0
R3 REMOUT
Page 0
Page 1
01
4
a
0~a3
Data memory page (0~1)
Fig 4-2 Composition of Data Memory



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