參數(shù)資料
型號(hào)： M30880FJTGP
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 32 MHz, MICROCONTROLLER, PQFP100
封裝： 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100
文件頁數(shù)： 30/60頁
文件大?。?/td> 458K
代理商： M30880FJTGP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
3826 Group
37
A-D CONVERTER
The functional blocks of the A-D converter are described below.
[A-D Conversion Register (AD)] 003516
The A-D conversion register is a read-only register that contains
the result of an A-D conversion. When reading this register during
an A-D conversion, the previous conversion result is read.
[A-D Control Register (ADCON)] 003416
The A-D control register controls the A-D conversion process. Bits
0 to 2 of this register select specific analog input pins. Bit 3 signals
the completion of an A-D conversion. The value of this bit remains
at “0” during an A-D conversion, then changes to “1” when the A-
D conversion is completed. Writing “0” to this bit starts the A-D
conversion. Bit 4 controls the transistor which breaks the through
current of the resistor ladder. When bit 5, which is the AD external
trigger valid bit, is set to “1”, this bit enables A-D conversion even
by a falling edge of an ADT input. Set ports which share with ADT
pins to input when using an A-D external trigger.
Comparison Voltage Generator
The comparison voltage generator divides the voltage between
AVSS and VREF by 256, and outputs the divided voltages.
Channel Selector
The channel selector selects one of the input ports P67/AN7–P60/
AN0.
Comparator and Control Circuit
The comparator and control circuit compare an analog input volt-
age with the comparison voltage and store the result in the A-D
conversion register. When an A-D conversion is completed, the
control circuit sets the AD conversion completion bit and the AD
interrupt request bit to “1”.
Note that the comparator is constructed linked to a capacitor, so
set f(XIN) to at least 500kHz during A-D conversion.
Use the clock divided from the main clock XIN as the internal clock
φ.
Fig. 37 A-D converter block diagram
Fig. 36 Structure of A-D control register
A-D control register
(ADCON : address 003416)
AD conversion completion bit
0 : Conversion in progress
1 : Conversion completed
Analog input pin selection bits
0 0 0 : P60/AN0
0 0 1 : P61/AN1
0 1 0 : P62/AN2
0 1 1 : P63/AN3
1 0 0 : P64/AN4
1 0 1 : P65/AN5
1 1 0 : P66/AN6
1 1 1 : P67/AN7
VREF input switch bit
0 : OFF
1 : ON
AD external trigger valid bit
0 : A-D external trigger invalid
1 : A-D external trigger valid
b7
b0
Interrupt source selection bit
0 : Interrupt request at A-D
conversion completed
1 : Interrupt request at ADT
input falling
Not used (returns “0” when read)
Comparator
A-D control circuit
ADT/A-D interrupt request
AVSS
VREF
P60/SIN2/AN0
Data bus
A-D control register
b7
b0
A-D conversion
register
Resistor ladder
C
h
a
n
e
l
s
e
le
c
to
r
P67/AN7
P66/AN6
P65/AN5
P64/AN4
P63/SCLK22/AN3
P62/SCLK21/AN2
P61/SOUT2/AN1
P57/ADT/DA2
8
3
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M30880T-EPB 功能描述:DEV EMULATOR ACCESSORY RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關(guān)產(chǎn)品:1-Wire? 設(shè)備 產(chǎn)品目錄頁面:1429 (CN2011-ZH PDF)
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