參數(shù)資料
型號(hào): MC68HC11A1CFN2
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, 2 MHz, MICROCONTROLLER, PQCC52
封裝: PLASTIC, LCC-52
文件頁數(shù): 82/158頁
文件大?。?/td> 776K
代理商: MC68HC11A1CFN2
MOTOROLA
9-2
RESETS, INTERRUPTS, AND LOW POWER MODES
MC68HC11A8
TECHNICAL DATA
9
Figure 9-1 Reset Timing
supply voltage. The power-on circuitry provides a 4064 cycle time delay from the time
of the first oscillator operation. In a system where E = 2 MHz, power on reset lasts
about 2 milliseconds. If the external RESET pin is low at the end of the power-on delay
time, the MCU remains in the reset condition until the RESET pin goes high.
9.1.2.1 CPU
After reset the CPU fetches the restart vector from locations $FFFE and $FFFF
($BFFE and $BFFF if in special bootstrap or special test operating mode) during the
first three cycles, and begins executing instructions. The stack pointer and other CPU
registers are indeterminate immediately after reset; however, the X and I interrupt
mask bits in the condition code register are set to mask any interrupt requests. Also,
the S bit in the condition code register is set to disable the STOP mode.
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFF
VECTOR
FETCH
1
E
RPIN
ENABLE RESET PIN
PULL-DOWN
(INTERNAL SIGNAL)
EXTERNAL RESET CASE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFA
FFFB
VECTOR
FETCH
1
E
RPIN
COP WATCHDOG RESET CASE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFE
FFFC
FFFD
VECTOR
FETCH
1
E
RPIN
CLOCK MONITOR RESET CASE
FFFE
RESET PIN SAMPLED AT THIS TIME. LOW LEVEL INDICATES EXTERNAL RESET. HIGH LEVEL INDICATES CLOCK MONITOR OR COP SYSTEM RESET.
1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC11A1CFN3 制造商:Rochester Electronics LLC 功能描述:
MC68HC11A1CFNE3 功能描述:8位微控制器 -MCU 8B MCU 256RAM A/D EE 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
MC68HC11A1CFNE3 制造商:Freescale Semiconductor 功能描述:8-BIT MICROCONTROLLER IC
MC68HC11A1CFNE3R 功能描述:8位微控制器 -MCU 8B MCU 256RAM A/D EE 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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
MC68HC11A1CFU2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller