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參數(shù)資料
| 型號： | M37274EFSP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | CONN HEADER 14POS SGL PCB 30GOLD |
| 中文描述： | 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器 |
| 文件頁數(shù)： | 33/147頁 |
| 文件大?。?/td> | 2042K |
| 代理商： | M37274EFSP |
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33
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274EFSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
A-D CONVERTER
(1)A-D Conversion Register (AD)
A-D conversion reigister is a read-only register that stores the result
of an A-D conversion. This register should not be read during A-D
conversion.
(2)A-D Control Register (ADCON)
The A-D control register controls A-D conversion. Bits 1 and 0 of this
register select analog input pins. When these pins are not used as
anlog input pins, they are used as ordinary I/O pins. Bit 3 is the A-D
conversion completion bit, A-D conversion is started by writing “0” to
this bit. The value of this bit remains at “0” during an A-D conversion,
then changes to “1” when the A-D conversion is completed.
Bit 4 controls connection between the resistor ladder and V
CC
. When
not using the A-D converter, the resistor ladder can be cut off from
the internal V
CC
by setting this bit to “0,” accordingly providing low-
power dissipation.
(3)Comparison Voltage Generator (Resistor
Ladder)
The voltage generator divides the voltage between V
SS
and V
CC
by
256, and outputs the divided voltages to the comparator as the refer-
ence voltage V
ref
.
(4)Channel Selector
The channel selector connects an analog input pin, selected by bits
1 and 0 of the A-D control register, to the comparator.
(5)Comparator and Control Circuit
The conversion result of the analog input voltage and the reference
voltage “V
ref
” is stored in the A-D conversion register. The A-D con-
version completion bit and A-D conversion interrupt request bit are
set to “1” at the completion of A-D conversion.
Fig. 27. A-D Comparator Block Diagram
A-D control register
(
address 00EF
16
)
A-D control circuit
Data bus
Switch tree
A-D conversion
interrupt request
Resistor ladder
Compa-
rator
C
A-D conversion register
AD1
AD2
AD3
AD4
(address 00EE
16
)
b7
b0
2
8
V
SS
V
CC
AD5
AD6
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| M37274ERSS | 功能描述:EMULATION MCU/8BIT CMOS EMULATIO 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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| M37274MA-053SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
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