- 您现在的位置：买卖IC网 > PDF目录379298 > M68HC05M68H (Motorola, Inc.) HCMOS Microcontroller Unit PDF资料下载
参数资料
| 型号： | M68HC05M68H |
| 厂商： | Motorola, Inc. |
| 英文描述： | HCMOS Microcontroller Unit |
| 中文描述： | HCMOS微控制器 |
| 文件页数： | 79/130页 |
| 文件大小： | 1541K |
| 代理商： | M68HC05M68H |
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页当前第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页第125页第126页第127页第128页第129页第130页
Analog Subsystem
Digital Section
MC68HC705P6A
—
Rev. 2.0
Advance Information
MOTOROLA
Analog Subsystem
79
9.5 Digital Section
The following paragraphs describe the operation and performance of
digital modules within the analog subsystem.
9.5.1 Conversion Times
Each input conversion requires 32 internal clock cycles, which must be
at a frequency equal to or greater than 1 MHz.
9.5.2 Internal versus External Oscillator
If the internal clock is 1 MHz or greater (i.e., external oscillator 2 MHz or
greater), the internal RC oscillator must be turned off and the external
oscillator used as the conversion clock.
If the MCU internal clock frequency is less than 1 MHz (2 MHz external
oscillator), the internal RC oscillator (approximately 1.5 MHz) must be
used for the A/D converter clock. The internal RC clock is selected by
setting the ADRC bit in the ADSC register.
When the internal RC oscillator is being used, these limitations apply:
1.
Since the internal RC oscillator is running asynchronously with
respect to the internal clock, the conversion complete bit (CC) in
register ADSC must be used to determine when a conversion
sequence has been completed.
2.
Electrical noise will slightly degrade the accuracy of the A/D
converter. The A/D converter is synchronized to read voltages
during the quiet period of the clock driving it. Since the internal and
external clocks are not synchronized, the A/D converter will
occasionally measure an input when the external clock is making
a transition.
相关PDF资料 |
PDF描述 |
|---|---|
| M68HC11K | 8-BIT MICROCONTROLLER |
| M68HC711CFD | CONFIG REGISTER PROGRAMMING FOR EEPROM-BASED MHC MICROCONTROLLERS |
| M68HC711CFG | CONFIG REGISTER PROGRAMMING FOR EEPROM-BASED MHC MICROCONTROLLERS |
| M68SDIL12 | The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit |
| M68ADP912DG128PV | The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M68HC08 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Microcontrollers |
| M68HC08M6 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:HCMOS Microcontroller Unit |
| M68HC08M68H | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:HCMOS Microcontroller Unit |
| M68HC11 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:CONFIG Register Programming for EEPROM-based M68HC11 Microcontrollers |
| M68HC11_03 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:8-channel, 8-bit analog-to-digital (A/D) converter |
发布紧急采购，3分钟左右您将得到回复。