- 您现在的位置：买卖IC网 > PDF目录1949 > MC68HC705SR3CPE (Freescale Semiconductor)IC MCU 3.75K 2.1MHZ OTP 40-DIP PDF资料下载
参数资料
| 型号： | MC68HC705SR3CPE |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 48/96页 |
| 文件大小： | 0K |
| 描述： | IC MCU 3.75K 2.1MHZ OTP 40-DIP |
| 标准包装： | 9 |
| 系列： | HC05 |
| 核心处理器： | HC05 |
| 芯体尺寸： | 8-位 |
| 速度： | 4MHz |
| 外围设备： | LED，POR |
| 输入/输出数： | 32 |
| 程序存储器容量： | 3.75KB（3.75K x 8） |
| 程序存储器类型： | OTP |
| RAM 容量： | 192 x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 3 V ~ 5.5 V |
| 数据转换器： | A/D 4x8b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 包装： | 管件 |
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页当前第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
Freescale
7-2
MC68HC05SR3
ANALOG TO DIGITAL CONVERTER
7
7.1
ADC Operation
As shown in Figure 7-1, the ADC consists of an analog multiplexer, an 8-bit digital to analog
capacitor array, a comparator and a successive approximation register (SAR).
There are eight options that can be selected by the multiplexer; the AN0 to AN3 input pins, VRH,
VRL, (VRH+VRL)/4, or (VRH+VRL)/2. Selection is done via the CHx bits in the ADC Status and
Control Register. AN0 to AN3 are input points for ADC conversion operations; the others are
reference points which can be used for test purposes. The converter uses VRH and VRL as
reference voltages. An input voltage equal to or greater than VRH converts to $FF. An input voltage
equal to or less than VRL, but greater than VSS, converts to $00. Maximum and minimum ratings
must not be exceeded. Each analog input source should use VRH as the supply voltage and should
be referenced to VRL for the ratiometric conversions. To maintain full accuracy of the ADC, the
following should be noted:
1) VRH should be equal to or less than VCC;
2) VRL should be equal to or greater than VSS but less than maximum
specifications; and
3) VRH–VRL should be equal to or greater than 4 Volts.
The ADC reference inputs (VRH and VRL) are applied to a precision internal digital to analog
converter. Control logic drives this D/A converter and the analog output is successively compared
with the selected analog input sampled at the beginning of the conversion. The conversion is
monotonic with no missing codes.
The result of each successive comparison is stored in the successive approximation register
(SAR) and, when the conversion is complete, the contents of the SAR are transferred to the
read-only ADC Data Register ($0F), and the conversion complete flag, COCO, is set in the
ADC Status and Control Register ($0E).
Warning: Any write to the ADC Status and Control Register will abort the current conversion,
reset the conversion complete flag (COCO) and a new conversion starts on the
selected channel.
At power-on or external reset, both the ADRC and ADON bits are cleared, thus the ADC is
disabled.
TPG
50
05SR3.Book Page 2 Thursday, August 4, 2005 1:08 PM
相关PDF资料 |
PDF描述 |
|---|---|
| MC68HC711D3CFN2 | IC MCU 2MHZ 4K OTP 44-PLCC |
| MC68HC908GT8CFB | IC MCU 8K FLASH 8MHZ 44-QFP |
| MC68HC908JL3ECFA | IC MCU 4K FLASH 8MHZ 48-LQFP |
| MC68HC908QT2CFQ | MCU 8-BIT 1.5KB FLASH 8-DFN |
| MC68HC908SR12CFA | MICROCONTROLLER 48 PIN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68HC705SR3CPE | 制造商:Freescale Semiconductor 功能描述:8-Bit Microcontroller IC |
| MC68HC705SR3PE | 功能描述:IC MCU 3.75K 2.1MHZ OTP 40-DIP RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C，SPI，UART/USART 外围设备:欠压检测/复位，POR，PWM，WDT 输入/输出数:32 程序存储器容量:32KB（16K x 16） 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT |
| MC68HC706P6ACDW | 制造商:Motorola Inc 功能描述: |
| MC68HC708MP16CFU | 制造商:MAJOR 功能描述: |
| MC68HC711D3CFBE2 | 制造商:Freescale Semiconductor 功能描述: |
发布紧急采购，3分钟左右您将得到回复。