參數(shù)資料
型號: M37630E4FP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQFP44
封裝: 0.80 MM PITCH, PLASTIC, QFP-44
文件頁數(shù): 29/48頁
文件大?。?/td> 563K
代理商: M37630E4FP
MITSUBISHI MICROCOMPUTERS
7630 Group
35
MITSUBISHI
ELECTRIC
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
A-D CONVERTER
The A-D converter uses the successive approximation method with
8 bit resolution. The functional blocks of the A-D converter are
described below. Refer to Block diagram of A-D converter.
Comparison Voltage Generator
The comparison voltage generator divides the voltage between
AVSS and VREF by 256, and outputs the divided voltage.
Channel Selector
The channel selector selects one of ports P00/AN0 to P07/AN7, and
inputs its voltage to the comparator.
A-D conversion register AD
The A-D conversion register is a read-only register that stores the
result of an A-D conversion. This register must not be read during
an A-D conversion.
Fig. 39
Block diagram of A-D converter
A-D control register (Structure of A-D control reg-
ister)
The A-D control register controls the A-D conversion process. Bits 0
to 2 select a specific analog input pin. Bit 3 signals the completion
of an A-D conversion. The value of this bit remains “0” during an A-
D conversion, and changes to “1” when an A-D conversion ends.
Writing “0” to this bit starts the A-D conversion. Bit 4 is the VREF/
Input switch bit.
AVSS
P00/AN0
3
A-D control register
b7
b0
comparison voltage
generator
A-D control circuit
Comparator
P07/AN7
VREF
A-D interrupt request
A-D conversion register
ch
annel
se
le
ctor
Data bus
VREF/Input switch bit
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相關代理商/技術參數(shù)
參數(shù)描述
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