- 您現在的位置：買賣IC網 > PDF目錄371051 > MC68HC11K4CFN4 (MOTOROLA INC) Technical Summary 8-Bit Microcontroller PDF資料下載
參數資料
| 型號： | MC68HC11K4CFN4 |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Technical Summary 8-Bit Microcontroller |
| 中文描述： | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQCC84 |
| 封裝： | PLASTIC, LCC-84 |
| 文件頁數： | 38/80頁 |
| 文件大小： | 420K |
| 代理商： | MC68HC11K4CFN4 |
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頁當前第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
MOTOROLA
38
M68HC11 K Series
MC68HC11KTS/D
5 Resets and Interrupts
All M68HC11 MCUs have three reset vectors and 18 interrupt vectors. The reset vectors are as follows:
RESET, or Power-On Reset
Clock Monitor Fail
COP Failure
The 18 interrupt vectors service 22 interrupt sources (three nonmaskable, 19 maskable). The three non-
maskable interrupt sources are as follows:
XIRQ Pin (X-Bit Interrupt)
Illegal Opcode Trap
Software Interrupt
On-chip peripheral systems generate maskable interrupts, which are recognized only if the global inter-
rupt mask bit (I) in the condition code register (CCR) is clear. Maskable interrupts are prioritized accord-
ing to a default arrangement; however, any one source can be elevated to the highest maskable priority
position by a software-accessible control register (HPRIO). The HPRIO register can be written at any
time, provided bit I in the CCR is set.
Nineteen interrupt sources in the M68HC11 K series devices are subject to masking by the global inter-
rupt mask bit (bit I in the CCR). In addition to the global bit I, all of these sources, except the external
interrupt (IRQ) pin, are controlled by local enable bits in control registers. Most interrupt sources in
M68HC11 devices have separate interrupt vectors; therefore, there is usually no need for software to
poll control registers to determine the cause of an interrupt.
For some interrupt sources, such as the SCI interrupts, the flags are automatically cleared during the
normal course of responding to the interrupt requests. For example, the RDRF flag in the SCI system
is cleared by the automatic clearing mechanism invoked by a read of the SCI status register while RDRF
is set, followed by a read of the SCI data register. The normal response to an RDRF interrupt request
would be to read the SCI status register to check for receive errors, then to read the received data from
the SCI data register. These two steps satisfy the automatic clearing mechanism without requiring any
special instructions.
Refer to the following table for a list of interrupt and reset vector assignments.
相關PDF資料 |
PDF描述 |
|---|---|
| MC68HC11K4CFU2 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4CFU4 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4MFN2 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4MFN3 | Technical Summary 8-Bit Microcontroller |
| MC68HC11K4MFN4 | Technical Summary 8-Bit Microcontroller |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MC68HC11K4CFS2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC11K4CFS3 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC11K4CFS4 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC11K4CFU2 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
| MC68HC11K4CFU3 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS MICROCONTROLLER UNIT |
發布緊急采購，3分鐘左右您將得到回復。