參數(shù)資料
型號： M37274MA-053SP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
中文描述： 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù)： 120/147頁
文件大?。?/td> 2042K
代理商： M37274MA-053SP
120
MITSUBISHI MICROCOMPUTERS
M37274EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
Structure of Register
The figure of each register structure describes its functions, contents
at reset, and attributes as follows:
Note :
The following registers are the EPROM version’s registers.
They are different from the MASK version’s.
Values immediately after reset release
Bit attributes
(Note 1)
(Note 2)
Bits
2:
Bit attributesThe 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 :
RRead
WWrite
: 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
Write enabled
Write disabled
“0” can be set by software, but “1”
cannot be set.
8
b7b6 b5b4b3 b2b1b0
1
B
After reset
R W
0
CPU Mode Register
0, 1
2
3, 4
1
Name
Functions
Processor mode bits
(CM0, CM1)
0 0: Single-chip mode
0 1:
1 0: Not available
1 1:
Fix these bits to “1.”
0
Stack page selection
bit (Note) (CM2)
1
b1 b0
0: 0 page
1: 1 page
0
0
5
1
Nothing is assigned. This bit is write disable bit.
When this bit is read out, the value is “0.”
Clock switch bits
(CM6, CM7)
0 0: f(X
IN
) = 8 MHz
0 1: f(X
IN
) = 12 MHz
1 0: f(X
IN
) = 16 MHz
1 1: Do not set
6, 7
0
b7 b6
CPU mode register (CPUM) (CM) [Address FB
16
]
R W
R W
R W
R W
R W
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