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| 型號： | M38K29F8LHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 142/151頁 |
| 文件大?。?/td> | 1403K |
| 代理商： | M38K29F8LHP |
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38K2 Group
Rev.3.00
Oct 15, 2006
page 90 of 147
REJ03B0193-0300
A/D CONVERTER
The functional blocks of the A/D converter are described below.
[AD Conversion Register 1, 2 (AD1, AD2)]
003716, 003816
The AD conversion register is a read-only register that stores the
result of an A/D conversion. When reading this register during an
A/D conversion, the previous conversion result is read.
Bit 7 of the AD conversion register 2 must be set to “0”. Not only
10-bit reading but also only high-order 8-bit reading of conversion
result can be performed by selecting the reading procedure of the
AD conversion registers 1, 2 after A/D conversion is completed (in
Figure 133).
The 8-bit reading inclined to MSB is performed when reading the
AD converter register 1 after A/D conversion is started or reset;
and when the AD converter register 1 is read after reading the AD
converter register 2, the 8-bit reading inclined to LSB is per-
formed.
[AD Control Register (ADCON)] 003616
The AD control register controls the A/D conversion process. Bits
0 to 2 select a specific analog input pin. Bit 3 signals the comple-
tion of an A/D conversion. The value of this bit remains at “0”
during an A/D conversion, and changes to “1” when an A/D con-
version ends. Writing “0” to this bit starts the A/D conversion.
Comparison Voltage Generator
The comparison voltage generator divides the voltage between
VREF and AVSS into 1024, and that outputs the comparison volt-
age.
The A/D converter successively compares the comparison voltage
Vref in each mode, dividing the VREF voltage (see below), with the
input voltage.
10-bit reading
Vref =
n (n = 0–1023)
8-bit reading
Vref =
n (n = 0–255)
Channel Selector
The channel selector selects one of the input ports P17/AN7–P10/
AN0.
Comparator and Control Circuit
The comparator and control circuit compares an analog input volt-
age with the comparison voltage, and then stores the result in the
AD conversion registers 1, 2. When an A/D conversion is com-
pleted, the control circuit sets the AD conversion completion bit
and the AD interrupt request bit to “1”.
Note that because the comparator consists of a capacitor cou-
pling, set f(system clock) to 500 kHz or more during an A/D
conversion.
Fig. 132 Structure of AD control register
VREF
256
VREF
1024
Fig. 133 10-bit/8-bit reading
AD control register
(ADCON : address 003616)
AD conversion completion bit
0 : Conversion in progress
1 : Conversion completed
Analog input pin selection bits
0 0 0 : P10/DQ0/AN0
0 0 1 : P11/DQ1/AN1
0 1 0 : P12/DQ2/AN2
0 1 1 : P13/DQ3/AN3
1 0 0 : P14/DQ4/AN4
1 0 1 : P15/DQ5/AN5
1 1 0 : P16/DQ6/AN6
1 1 1 : P17/DQ7/AN7
Not used (indefinite at read)
(These bits are write disabled bits.)
b7
b0
10-bit reading
(Read address 003816 before 003716)
Note : Bits 2 to 7 of address 003816 become “0”
at reading.
b8
b7 b6 b5 b4 b3 b2 b1 b0
b7
b0
b9
b7
b0
b9 b8 b7 b6 b5 b4 b3 b2
b7
b0
0
(address 003816)
(address 003716)
8-bit reading
(Read only address 003716)
(address 003716)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38K29F8LHP#U0 | 功能描述:IC 740/38K2 MCU FLASH 64-LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 產(chǎn)品培訓(xùn)模塊:CAN Basics Part-1 CAN Basics Part-2 Electromagnetic Noise Reduction Techniques Part 1 M16C Product Overview Part 1 M16C Product Overview Part 2 標(biāo)準(zhǔn)包裝:1 系列:M16C™ M32C/80/87 核心處理器:M32C/80 芯體尺寸:16/32-位 速度:32MHz 連通性:EBI/EMI，I²C，IEBus，IrDA，SIO，UART/USART 外圍設(shè)備:DMA，POR，PWM，WDT 輸入/輸出數(shù):121 程序存儲器容量:384KB（384K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:24K x 8 電壓 - 電源 (Vcc/Vdd):3 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 34x10b，D/A 2x8b 振蕩器型:內(nèi)部 工作溫度:-20°C ~ 85°C 封裝/外殼:144-LQFP 包裝:托盤 產(chǎn)品目錄頁面:749 (CN2011-ZH PDF) 配用:R0K330879S001BE-ND - KIT DEV RSK M32C/87 |
| M38K29F8LHP#UO | 制造商:Renesas Electronics Corporation 功能描述: |
| M38K29T-ADF | 功能描述:DEV TEMPORARY TARGET BOARD FOR M 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) |
| M38K29T-PAC | 制造商:Renesas Electronics Corporation 功能描述:DEV SIMPLE TOOL SYSTEM PKG FOR 38000/38K - Bulk |
| M38UC-150 | 制造商:M/A-COM Technology Solutions 功能描述:MICROWAVE MIXER - Bulk |
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