- 您现在的位置：买卖IC网 > PDF目录80476 > MC68HC08QY4CDWE (FREESCALE SEMICONDUCTOR INC) 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16 PDF资料下载
参数资料
| 型号： | MC68HC08QY4CDWE |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO16 |
| 封装： | 1.27 MM PITCH, LEAD FREE, PLASTIC, MS-013AA, SOIC-16 |
| 文件页数： | 112/178页 |
| 文件大小： | 2311K |
| 代理商： | MC68HC08QY4CDWE |
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页当前第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页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页
I/O Signals
MC68HC08QY/QT Family Data Sheet, Rev. 1
Freescale Semiconductor
39
To protect status bits during the break state, write a 0 to BCFE. With BCFE cleared (its default state),
software can read and write registers during the break state without affecting status bits. Some status bits
have a two-step read/write clearing procedure. If software does the first step on such a bit before the
break, the bit cannot change during the break state as long as BCFE is cleared. After the break, doing the
second step clears the status bit.
3.7 I/O Signals
The ADC10 module shares its pins with general-purpose input/output (I/O) port pins. See Figure 3-1 for
port location of these shared pins. The ADC10 on this MCU uses VDD and VSS as its supply and reference
pins. This MCU does not have an external trigger source.
3.7.1 ADC10 Analog Power Pin (VDDA)
The ADC10 analog portion uses VDDA as its power pin. In some packages, VDDA is connected internally
to VDD. If externally available, connect the VDDA pin to the same voltage potential as VDD. External filtering
may be necessary to ensure clean VDDA for good results.
NOTE
If externally available, route VDDA carefully for maximum noise immunity
and place bypass capacitors as near as possible to the package.
3.7.2 ADC10 Analog Ground Pin (VSSA)
The ADC10 analog portion uses VSSA as its ground pin. In some packages, VSSA is connected internally
to VSS. If externally available, connect the VSSA pin to the same voltage potential as VSS.
In cases where separate power supplies are used for analog and digital power, the ground connection
between these supplies should be at the VSSA pin. This should be the only ground connection between
these supplies if possible. The VSSA pin makes a good single point ground location.
3.7.3 ADC10 Voltage Reference High Pin (VREFH)
VREFH is the power supply for setting the high-reference voltage for the converter. In some packages,
VREFH is connected internally to VDDA. If externally available, VREFH may be connected to the same
potential as VDDA, or may be driven by an external source that is between the minimum VDDA spec and
the VDDA potential (VREFH must never exceed VDDA).
NOTE
Route VREFH carefully for maximum noise immunity and place bypass
capacitors as near as possible to the package.
AC current in the form of current spikes required to supply charge to the capacitor array at each
successive approximation step is drawn through the VREFH and VREFL loop. The best external component
to meet this current demand is a 0.1
μF capacitor with good high frequency characteristics. This capacitor
is connected between VREFH and VREFL and must be placed as close as possible to the package pins.
Resistance in the path is not recommended because the current will cause a voltage drop which could
result in conversion errors. Inductance in this path must be minimum (parasitic only).
相关PDF资料 |
PDF描述 |
|---|---|
| MC13213 | SPECIALTY MICROPROCESSOR CIRCUIT, PBGA71 |
| MSP430F4491IPZR | 16-BIT, FLASH, 8 MHz, RISC MICROCONTROLLER, PQFP100 |
| MAC7136MVM50 | 32-BIT, FLASH, 50 MHz, RISC MICROCONTROLLER, PBGA208 |
| MAC7141CFU50 | 32-BIT, FLASH, 50 MHz, RISC MICROCONTROLLER, PQFP100 |
| MC9S12XEG128MAA | 32-BIT, FLASH, 50 MHz, RISC MICROCONTROLLER, PQFP80 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68HC08SR12 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers |
| MC68HC08TV24CFB | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:M68HC08 Microcontrollers |
| MC68HC08XL36 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC08XL36CB | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC08XL36CFU | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
发布紧急采购，3分钟左右您将得到回复。