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| 型號： | MC68HCP11A1FN |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit Microcontrollers |
| 中文描述： | 8-BIT, EEPROM, MICROCONTROLLER, PQCC52 |
| 封裝： | PLASTIC, LCC-52 |
| 文件頁數(shù)： | 13/45頁 |
| 文件大小： | 286K |
| 代理商： | MC68HCP11A1FN |
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MC68HC11A8
MC68HC11A8TS/D
MOTOROLA
13
3 Resets
The MC68HC11A8 has three reset vectors and 18 interrupt vectors. The reset vectors are as follows:
and
Interrupts
RESET, or Power-On
COP Clock Monitor Fail
COP Failure
The eight interrupt vectors service 23 interrupt sources (three non-maskable, 20 maskable). The three
non-maskable interrupt vectors are as follows:
Illegal Opcode Trap
Software Interrupt
XIRQ Pin (Pseudo Non-Maskable Interrupt)
The 20 maskable interrupt sources are subject to masking by a global interrupt mask, the I bit in the
condition code register (CCR). In addition to the global I bit, all of these sources except the external
interrupt (IRQ) pin are controlled by local enable bits in control registers. Most interrupt sources in the
M68HC11 have separate interrupt vectors. For this reason, there is usually no need for software to poll
control registers to determine the cause of an interrupt. The maskable interrupt sources respond to a
fixed priority relationship, except that any one source can be dynamically elevated to the highest priority
position of any maskable source. Refer to the table of interrupt and reset vector assignments.
On-chip peripheral systems generate maskable interrupts that are recognized only if the I bit in the CCR
is clear. Maskable interrupts are prioritized according to a default arrangement, but any one source can
be elevated to the highest maskable priority position by the HPRIO register. The HPRIO register can be
written at any time, provided the I bit in the CCR is set.
For some interrupt sources, such as the parallel I/O and SCI interrupts, the flags are automatically
cleared during the course of responding to the interrupt requests. For example, the RDRF flag in the
SCI system is cleared by the automatic clearing mechanism, which consists of 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 is 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.
The real-time interrupt (RTI) function generates hardware interrupts at a fixed periodic rate. These hard-
ware interrupts provide a time reference signal for routines that measure real time. The routine notes
the number of times a particular interrupt has occurred and multiplies that number by the predetermined
subroutine execution time.
There are four RTI signal rates available in the MC68HC11A8. The MCU oscillator frequency and the
value of two software-accessible control bits, RTR1 and RTR0, in the pulse accumulator control register
(PACTL) determine these signal rates. Refer to
8 Main Timer
for more information about PACTL.
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參數(shù)描述 |
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| MC68HCP11E0CP2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MC68HCP11E0FN | 功能描述:MICROCONTROLLER MCU 8ADC 3MHC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC11 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323 |
| MC68HCP11E0FNE | 功能描述:8位微控制器 -MCU 8B MCU 512RAM COP A/D RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| MC68HCP11E1CFNE2 | 功能描述:8位微控制器 -MCU 8B MCU 512 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| MC68HCP11E1CFNE3 | 功能描述:8位微控制器 -MCU 8B MCU 512 BYTES RAM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
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