- 您现在的位置：买卖IC网 > PDF目录378662 > MC68HC11G5CFN (MOTOROLA INC) High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller PDF资料下载
参数资料
| 型号： | MC68HC11G5CFN |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller |
| 中文描述： | 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC84 |
| 封装： | PLASTIC, LCC-84 |
| 文件页数： | 113/195页 |
| 文件大小： | 839K |
| 代理商： | MC68HC11G5CFN |
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页当前第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页第179页第180页第181页第182页第183页第184页第185页第186页第187页第188页第189页第190页第191页第192页第193页第194页第195页
MC68HC11G5
ANALOG-TO-DIGITAL CONVERTER
MOTOROLA
9-1
SECTION 9
ANALOG-TO-DIGITAL CONVERTER
The Analog to Digital converter system consists of a single 10-bit successive approximation type
converter and a 16-channel multiplexer. Eight of the channels are connected to pins on the
MC68HC11G5, four are unused and the remaining four channels are dedicated to internal reference
points or test functions. There are eight 10-bit result registers and control logic allows for four or eight
consecutive conversions before stopping or for conversions to continue with the newest conversion
overwriting the oldest result register. Also, the control logic allows conversions to be performed on
a single selected channel, multiple times or consecutively on a selected group of four channels. In
addition, the control logic allows for converting all eight channels and either stopping or converting
continuously.
Two dedicated lines (V
rl
and V
rh
) are provided for the reference voltage inputs. These pins may be
connected to a separate or isolated power supply to ensure full accuracy of the AD conversion.
The 10-bit A/D converter accepts analog inputs ranging from V
rl
to V
rh
. Smaller input ranges can
also be obtained by adjusting V
rl
and V
rh
to the desired upper and lower limits. Conversion is
specified and tested for V
rl
= 0 volts and V
rh
= 5 volts. The A/D system can be operated with V
rh
below
V
DD
and/or V
rl
above V
SS
as long as V
rh
is above V
rl
by enough to support the conversions (2.5
to 5.0 volts).
Each set of four conversions takes 144 cycles of the E-clock, provided that E is greater than or equal
to 750 kHz. If E is less than 750 kHz, an internal R-C oscillator, which is nominally 1.5 MHz, must
be used for the A/D conversion clock. When the internal R-C oscillator is being used as the
conversion clock, the conversion complete flag (CCF) must be used to determine when a conversion
sequence has been completed. When using the internal R-C oscillator for A/D conversions the
sample and conversion process runs at the nominal 1.5 MHz rate; however, the conversion results
must be transferred to the MCU result registers synchronously with the MCU E-clock, so conversion
time is limited to a maximum of one channel per E-clock cycle.
Two control bits in the OPTION register control the basic configuration of the A/D system. The A to D
power-up bit (ADPU) allows the system to be disabled, resulting in reduced power consumption
when the A/D system is not being used. Any conversion which is in process when ADPU is written
to zero will be aborted. A delay of typically 100 microseconds is required after turning on the A/D
(by writing ADPU from 0 to 1) for the analog and comparator sections to stabilize. The CSEL bit is
used to select either the internal R-C oscillator or the MCU E-clock as the A/D system clock source.
相关PDF资料 |
PDF描述 |
|---|---|
| MC68HLC908LJ12 | Addendum to MC68HC908LJ12 |
| MC68HLC908QT1 | Microcontrollers |
| MC68HLC908QT2 | Microcontrollers |
| MC68HLC908QT4 | Microcontrollers |
| MC68HLC908QY1 | Microcontrollers |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MC68HC11G7 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Unit |
| MC68HC11G7CFN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| MC68HC11K0 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit |
| MC68HC11K0CFN2 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:8-Bit Microcontroller |
| MC68HC11K0CFN3 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:8-Bit Microcontroller |
发布紧急采购，3分钟左右您将得到回复。