參數(shù)資料
型號: M37225ECSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁數(shù): 8/128頁
文件大?。?/td> 1481K
代理商: M37225ECSP
M37225M6/M8/MA/MC-XXXSP, M37225ECSP
Rev.1.00
Nov 01, 2000
page 103 of 124
REJ03B0136-0100Z
Structure of Register
The figure of each register structure describes its functions, contents
at reset, and attributes as follows:
Values immediately after reset release
Bit attributes
(Note 1)
(Note 2)
Bit position
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 :
: Bit in which nothing is assigned
Notes 1: Values immediately after reset release
0 “0” after reset release
1 “1” after reset release
IndeterminateIndeterminate after reset release
Read enabled
Read disabled
R
RRead
Write enabled
Write disabled
“0” can be set by software, but “1”
cannot be set.
WWrite
W
b7 b6 b5 b4 b3 b2 b1 b0
B
Af t er re RW
CPU Mode Register
0, 1
2
3, 4
0
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.”
1
Stack page selection
bit (See note) (CM2)
1
b1 b0
0: 0 page
1: 1 page
1
0
5
1
Nothing is assigned. This bit is write disable bit.
When this bit is read out, the value is “1.”
6, 7
0
Clock switch bits
(CM6, CM7)
0 0: f(XIN) = 8 MHz
0 1: f(XIN) = 12 MHz
1 0: f(XIN) = 16 MHz
1 1: Do not set
b7 b6
CPU mode register (CPUM) (CM) [Address 00FB16]
R W
RW
R W
RW
<Example>
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