- 您现在的位置：买卖IC网 > PDF目录69366 > ST72621L4T1 (STMICROELECTRONICS) 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 PDF资料下载
参数资料
| 型号： | ST72621L4T1 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| 封装： | TQFP-44 |
| 文件页数： | 125/134页 |
| 文件大小： | 815K |
| 代理商： | ST72621L4T1 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页当前第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页
ST7262
90/134
10-BIT A/D CONVERTER (ADC) (Cont’d)
10.7.3.2 Digital A/D Conversion Result
The conversion is monotonic, meaning that the re-
sult never decreases if the analog input does not
and never increases if the analog input does not.
If the input voltage (VAIN) is greater than VDDA
(high-level voltage reference) then the conversion
result is FFh in the ADCDRMSB register and 03h
in the ADCDRLSB register (without overflow indi-
cation).
If the input voltage (VAIN) is lower than VSSA (low-
level voltage reference) then the conversion result
in the ADCDRMSB and ADCDRLSB registers is
00 00h.
The A/D converter is linear and the digital result of
the conversion is stored in the ADCDRMSB and
ADCDRLSB registers. The accuracy of the con-
version is described in the Electrical Characteris-
tics Section.
RAIN is the maximum recommended impedance
for an analog input signal. If the impedance is too
high, this will result in a loss of accuracy due to
leakage and sampling not being completed in the
alloted time.
10.7.3.3 A/D Conversion
Conversion can be performed in One-Shot or Con-
tinuous mode. Continuous mode is typically used
for monitoring a single channel. One-shot mode
should be used when the application requires in-
puts from several channels.
ADC Configuration
The analog input ports must be configured as in-
put, no pull-up, no interrupt. Refer to the I/O
ports chapter. Using these pins as analog inputs
does not affect the ability of the port to be read as
a logic input.
In the ADCCSR register:
– Select the CS[2:0] bits to assign the analog
channel to convert.
ADC One-Shot Conversion mode
In the ADCCSR register:
1.Set the ONE SHOT bit to put the A/D converter
in one shot mode.
2.Set the ADON bit to enable the A/D converter
and to start the conversion. The EOC bit is kept
low by hardware during the conversion.
Note: Changing the A/D channel during conver-
sion will stop the current conversion and start con-
version of the newly selected channel.
When a conversion is complete:
– The EOC bit is set by hardware.
– An interrupt request is generated if the ITE bit
is set.
– The ADON bit is reset by hardware.
– The result is in the ADCDR registers.
To read the 10 bits, perform the following steps:
1. Wait for interrupt or poll the EOC bit
2. Read ADCDRLSB
3. Read ADCDRMSB
The EOC bit is reset by hardware once the AD-
CDRMSB is read.
To read only 8 bits, perform the following steps:
1. Wait for interrupt or poll the EOC bit
2. Read ADCDRMSB
The EOC bit is reset by hardware once the AD-
CDRMSB is read.
To start another conversion, user should set the
ADON bit once again.
1
相关PDF资料 |
PDF描述 |
|---|---|
| ST72632K2B1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| ST72E631K4D0 | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, PDIP32 |
| ST72633K1M1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO34 |
| ST7263BK1M1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO34 |
| ST72F63BE4M1 | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ST7263-EMU2 | 功能描述:仿真器/模拟器 ST7 Emulator Board RoHS:否 制造商:Blackhawk 产品:System Trace Emulators 工具用于评估:C6000, C5000, C2000, OMAP, DAVINCI, SITARA, TMS470, TMS570, ARM 7/9, ARM Cortex A8/R4/M3 用于:XDS560v2 |
| ST7265X-EVAL/MS | 制造商:STMicroelectronics 功能描述:ST6 EVAL BD - Bulk |
| ST7265X-EVAL/PFD | 制造商:STMicroelectronics 功能描述:USB FLASH EVAL - Bulk |
| ST7266 | 制造商:6940 功能描述:ST7266 |
| ST7267C8T1L | 制造商:STMicroelectronics 功能描述: |
发布紧急采购，3分钟左右您将得到回复。