- 您現在的位置：買賣IC網 > PDF目錄371048 > MC68HC11A8VCFU2 (MOTOROLA INC) HCMOS Single-Chip Microcontroller PDF資料下載
參數資料
| 型號： | MC68HC11A8VCFU2 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | HCMOS Single-Chip Microcontroller |
| 中文描述： | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁數： | 71/158頁 |
| 文件大小： | 776K |
| 代理商： | MC68HC11A8VCFU2 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁當前第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁
MC68HC11A8
TECHNICAL DATA
PROGRAMMABLE TIMER, RTI, AND PULSE ACCUMULATOR
MOTOROLA
8-1
8
8 PROGRAMMABLE TIMER, RTI, AND PULSE ACCUMULATOR
This section describes the 16-bit programmable timer, the real time interrupt, and the
pulse accumulator system.
8.1 Programmable Timer
The timer has a single 16-bit free-running counter which is clocked by the output of a
four-stage prescaler (divide by 1, 4, 8, or 16), which is in turn driven by the MCU E
clock. Input functions are called input captures. These input captures record the count
from the free-running counter in response to a detected edge on an input line. Output
functions, called output compares, cause an output action when there is a match be-
tween a 16-bit output-compare register and the free-running counter. This timer sys-
tem has three input capture registers and five output compare registers.
8.1.1 Counter
The key element in the timer system is a 16-bit free-running counter, or timer counter
register. After reset, the MCU is configured to use the E clock as the input to the free-
running counter. Initialization software may optionally reconfigure the system to use
one of the three prescaler values. The prescaler control bits can only be written once
during the first 64 cycles after a reset. Software can read the counter at any time with-
out affecting its value because it is clocked and read during opposite phases of the E
clock.
A counter read should first address the most significant byte. An MPU read of this ad-
dress causes the least significant byte to be transferred to a buffer. This buffer is not
affected by reset and is accessed when reading the least significant byte of the
counter. For double byte read instructions, the two accesses occur on consecutive bus
cycles.
The counter is cleared to $0000 during reset and is a read-only register with one ex-
ception. In test modes only, any MPU write to the most significant byte presets the
counter to $FFF8 regardless of the value involved in the write.
When the count changes from $FFFF to $0000, the timer overflow flag (TOF) bit is set
in timer interrupt flag register 2 (TFLG2). An interrupt can be enabled by setting the
interrupt enable bit (TOI) in timer interrupt mask register 2 (TMSK2).
8.1.2 Input Capture
The input capture registers are 16-bit read-only registers which are not affected by re-
set and are used to latch the value of the counter when a defined transition is sensed
by the corresponding input capture edge detector. The level transition which triggers
counter transfer is defined by the corresponding input edge bits (EDGxB, EDGxA) in
TCTL2.
相關PDF資料 |
PDF描述 |
|---|---|
| MC68HC11A1VFU2 | HCMOS Single-Chip Microcontroller |
| MC68HC11E0CB2 | Microcontrollers |
| MC68S711E9CFN2 | Microcontrollers |
| MC68HC711E20FS3 | Microcontrollers |
| MC68L11E20FU2 | Microcontrollers |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC11AOFNR2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Motorola Inc 功能描述: 制造商:MOTOROLA 功能描述: |
| MC68HC11AX | 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:8-Bit Microcontrollers |
| MC68HC11C0 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontroller |
| MC68HC11C0CFN2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontroller |
| MC68HC11C0CFN3 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit Microcontroller |
發布緊急采購，3分鐘左右您將得到回復。