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7220 Fiches technique(PDF) 6 Page - Renesas Technology Corp

No de pièce 7220
Description  8-BIT SINGLE-CHIP MICROCOMPUTER
PDF  303 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7220 Fiches technique(HTML) 6 Page - Renesas Technology Corp

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2. Register diagram
The figure of each register structure describes its functions, contents at reset, end attributes as follows:
Values immediately after reset release
Bit attributes
(Note 1)
(Note 2)
Bits
2: Bit attributes••••••The attributes of control register bits are classified into 3 types : read-only, write-only
and read and write. In the figure, these attributes are represented as follows :
: Bit in which nothing is assigned
Notes 1: Values immediately after reset release
0••••••“0” after reset release
1••••••“1” after reset release
?••••••Indeterminate after reset release
••••••Read enabled
••••••Read disabled
R••••••Read
••••••Write enabled
••••••Write disabled
••••••“0” can be set by software, but “1”
cannot be set.
W••••••Write
b7 b6 b5 b4 b3 b2 b1 b0
CPU mode register (CPUM) (CM) [Address FB 16]
B
After reset
RW
CPU Mode Register
0, 1
2
3
to
5
0
1
Name
Functions
Fix these bits to “0.”
Fix these bits to “1.”
1
Stack page selection
bit (CM2)
1
0: 0 page
1: 1 page
10
0
6, 7
Indeterminate
1
11
RW
RW
RW
RW
R
—
W
—
V



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