- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45047 > M38588GCFP 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PDSO42 PDF資料下載
參數(shù)資料
| 型號： | M38588GCFP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PDSO42 |
| 封裝： | 8.40 X 17.50 MM, 0.80 MM PITCH, PLASTIC, SSOP-42 |
| 文件頁數(shù)： | 48/77頁 |
| 文件大?。?/td> | 824K |
| 代理商： | M38588GCFP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁當前第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁
Rev.1.10
Apr 3, 2006
page 52 of 75
REJ03B0139-0110
3858 Group
Fig. 50 Block diagram of A/D converter
C
h
a
n
e
l
s
e
le
c
to
r
A/D control circuit
Resistor ladder
VREF
VSS
Comparator
A/D interrupt request
b7
b0
4
8
P30/AN0
P31/AN1
P32/AN2
P33/AN3
P34/AN4
Data bus
AD control register
AD conversion register
(Address 003416)
(Address 003516)
P04/AN5
P05/AN6
P06/AN7
P07/AN8
A/D CONVERTER
[AD Conversion Register (ADL)] 003516
The A/D conversion register is a read-only register that stores the
result of A/D conversion. Do not read out this register during an A/
D conversion.
[AD Control Register (ADCON)] 003416
The A/D control register controls the A/D converter. Bit 3 to 0 are
analog input pin selection bits. Bit 4 is the AD conversion comple-
tion bit. The value of this bit remains at “0” during A/D conversion,
and changes to “1” at completion of A/D conversion.
A/D conversion is started by setting this bit to “0”.
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 ports P30/AN0 to P34/AN4,
P04/AN5 to P07/AN8 and inputs the voltage to the comparator.
Comparator and Control Circuit
The comparator and control circuit compare an analog input volt-
age with the comparison voltage, and the result is stored in the AD
conversion registers. 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 because the comparator consists of a capacitor cou-
pling, set f(XIN) to 500 kHz or more during an A/D conversion.
Fig. 49 Structure of AD control register
AD control register
(ADCON : address 003416, initial value: 1016)
Analog input pin selection bits
0 0 0 0: P30/AN0
0 0 0 1: P31/AN1
0 0 1 0: P32/AN2
0 0 1 1: P33/AN3
0 1 0 0: P34/AN4
0 1 0 1: P04/AN5
0 1 1 0: P05/AN6
0 1 1 1: P06/AN7
1 0 0 0: P07/AN8
AD conversion completion bit
0: Conversion in progress
1: Conversion completed
Not used (returns “0” when read)
b7
b0
sNote on A/D converter
The comparator uses internal capacitors whose charge will be lost
if the clock frequency is too low.
Make sure that f(XIN) is 500 kHz or more during A/D conversion.
As for AD translation accuracy, on the following operating condi-
tions, accuracy may become low.
(1) Since the analog circuit inside a microcomputer becomes sen-
sitive to noise when VREF voltage is set up lower than Vcc voltage,
accuracy may become low rather than the case where VREF volt-
age and Vcc voltage are set up to the same value..
(2) When VREF voltage is lower than [ 3.0 V ], the accuracy at the
low temperature may become extremely low compared with that at
room temperature. When the system would be used at low tem-
perature, the use at VREF=3.0 V or more is recommended.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M38749EFT | 8-BIT, OTPROM, 6.4 MHz, MICROCONTROLLER, PQFP80 |
| M38747M4T | 8-BIT, MROM, 6.4 MHz, MICROCONTROLLER, PQFP80 |
| M38747M6T | 8-BIT, MROM, 6.4 MHz, MICROCONTROLLER, PQFP80 |
| M38747M8T | 8-BIT, MROM, 6.4 MHz, MICROCONTROLLER, PQFP80 |
| M38747MCF | 8-BIT, MROM, 6.4 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38588GCFP#U0 | 功能描述:IC 740/3858 MCU QZ-ROM 42SSOP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設(shè)備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| M38588GCSP#U0 | 功能描述:IC 740/3858 MCU QZ-ROM 42DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標準包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設(shè)備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| M3860 | 功能描述:電纜固定件和配件 FLEX LTSCG 500 RoHS:否 制造商:Heyco 類型:Cable Grips, Liquid Tight 材料:Nylon 顏色:Black 安裝方法:Cable 最大光束直徑:11.4 mm 抗拉強度: |
| M3860 BK001 | 制造商:Alpha Wire Company 功能描述:CBL 30COND 14AWG BLK 1000' |
| M3860 BK002 | 制造商:Alpha Wire Company 功能描述:CBL 30COND 14AWG BLK 500' |
發(fā)布緊急采購，3分鐘左右您將得到回復。