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參數(shù)資料
| 型號： | S1C60N02D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 0.08 MHz, MICROCONTROLLER, UUC52 |
| 封裝： | DIE-52 |
| 文件頁數(shù)： | 58/102頁 |
| 文件大?。?/td> | 674K |
| 代理商： | S1C60N02D |
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S1C60N02 TECHNICAL MANUAL
EPSON
51
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (A/D Converter)
The A/D converter has a function which allows interrupt to
occur after A/D conversion.
When the up/down counter TC0–TC15 is counted down to
"0000H", both counters stop counting. The interrupt factor
flag IAD is set to "1" at the falling edge of the next clock. If
the up/down counter TC0–TC15 overflow during counting-
up operation, the interrupt factor flag is set to "1" at the
rising edge of the clock immediately after the counter
reaches "0000H".
This interrupt factor allows masking by the interrupt mask
register EIAD. If the EIAD is set at "1", an interrupt occurs
in the CPU. If the EIAD is set at "0", the interrupt factor flag
is set to "1". However, no interrupt will occur in the CPU.
The interrupt factor flag is reset to "0" by a reading opera-
tion.
Timing of interrupt by the A/D converter is shown in Figure
4.8.5.
Interrupt function
Fig. 4.8.5
Timing of A/D
converter interrupt
Temperature measurement is possible with the A/D con-
verter in which a thermistor is used as a sensor. Elements
to be connected and counter setting in the case of tempera-
ture measurement are as follows:
Example:
Temperature measurement at -20°C to 70°C
Reference resistance ....... 49.8 k
Thermistor ...................... 50 k
Oscillating condenser ...... 2,200 pF
Usage example of
the A/D converter
ADRUN register
ADOUT
Up-counter data
Up/down counter clock
Up/down counter data
Interrupt
n
n+1 n+2
0
123
FFFE FFFF
0
x
x-1 x-2
x-1
x-2
x-3
3210
m
m-1
Oscillation with reference resistor
Oscillation with sensor
12
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