參數(shù)資料
型號(hào)： M34514M8-759FP
廠商： Mitsubishi Electric Corporation
英文描述： SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述： 單芯片4位微機(jī)的CMOS
文件頁(yè)數(shù)： 41/106頁(yè)
文件大小： 1304K
代理商： M34514M8-759FP
41
4513/4514 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
Table 16 Change of successive comparison register AD during A-D conversion
Comparison voltage (V
ref
) value
Change of successive comparison register AD
-------------
At starting conversion
±
±
±
±
±
(7) Operation description
A-D conversion is started with the A-D conversion start instruction
(ADST). The internal operation during A-D conversion is as follows:
When A-D conversion starts, the register AD is cleared to
“000
16
.”
Next, the topmost bit of the register AD is set to “1,” and the
comparison voltage V
ref
is compared with the analog input volt-
age V
IN
.
When the comparison result is V
ref
< V
IN
, the topmost bit of the
register AD remains set to “1.” When the comparison result is
V
ref
> V
IN
, it is cleared to “0.”
The 4513/4514 Group repeats this operation to the lowermost bit of
the register AD to convert an analog value to a digital value. A-D
conversion stops after 62 machine cycles (46.5
μ
s when f(X
IN
) =
4.0 MHz in high-speed mode) from the start, and the conversion re-
sult is stored in the register AD. An A-D interrupt activated condition
is satisfied and the ADF flag is set to “1” as soon as A-D conversion
completes (Figure 27).
7
1: 1st comparison result
7
3: 3rd comparison result
7
9: 9th comparison result
7
2: 2nd comparison result
7
8: 8th comparison result
7
A: Ath comparison result
1st comparison
2nd comparison
3rd comparison
After 10th comparison
completes
1
7
1
7
1
7
1
0
1
7
2
7
2
0
0
1
7
3
0
0
0
7
8
0
0
0
7
9
0
0
0
7
A
A-D conversion result
V
DD
2
V
DD
2
V
DD
2
V
DD
2
V
DD
4
V
DD
4
V
DD
8
V
DD
1024
○
○
○
○
-------------
-------------
-------------
-------------
-------------
-------------
-------------
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