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參數資料
型號： 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： 97/158頁
文件大小： 776K
代理商： MC68HC11A1CFN2
MC68HC11A8
TECHNICAL DATA
RESETS, INTERRUPTS, AND LOW POWER MODES
MOTOROLA
9-17
9
NOTE:
During reset, PSEL3, PSEL2, PSEL1, and PSEL0 are initialized to 0:1:0:1 which corresponds to “Reserved (de-
fault to IRQ)” being the highest priority I-bit-related interrupt source.
9.3 Low-Power Modes
The MCU contains two programmable low power consumption modes; WAIT and
STOP. These two instructions are discussed below.
Table 9-7
summarizes the activity
on all pins of the MCU for all operating conditions.
9.3.1 WAIT Instruction
The WAI instruction puts the MCU in a low power consumption mode, keeping the os-
cillator running. Upon execution of a WAI instruction, the machine state is stacked and
program execution stops. The wait state can be exited only by an unmasked interrupt
or RESET. If the I bit is set (interrupts masked) and the COP is disabled, the timer sys-
tem will be turned off to additionally reduce power consumption. The amount of power
savings is application dependent and depends upon circuitry connected to the MCU
pins as well as which subsystems (i.e., timer, SPI, SCI) are active when the WAIT
mode is entered. Turning off the A/D subsystem by clearing ADPU further reduces
WAIT mode current.
9.3.2 STOP Instruction
The STOP instruction places the MCU in its lowest power consumption mode provided
the S bit in the condition code register is clear. If the S bit is set, the STOP mode is
disabled and STOP instructions are treated as NOPs (no operation). In the STOP
mode, all clocks including the internal oscillator are stopped causing all internal pro-
cessing to be halted. Recovery from the STOP mode may be accomplished by RE-
SET, XIRQ, or an unmasked IRQ. When the XIRQ is used, the MCU exits from the
STOP mode regardless of the state of the X bit in the condition code register; however,
Table 9-6 Highest Priority I Interrupt versus PSEL[3:0]
PSEL3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
PSEL2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
PSEL1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
PSEL0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Interrupt Source Promoted
Timer Overflow
Pulse Accumulator Overflow
Pulse Accumulator Input Edge
SPI Serial Transfer Complete
SCI Serial System
Reserved (Default to IRQ)
IRQ (External Pin or Parallel l/O)
Real Time Interrupt
Timer Input Capture 1
Timer Input Capture 2
Timer Input Capture 3
Timer Output Compare 1
Timer Output Compare 2
Timer Output Compare 3
Timer Output Compare 4
Timer Output Compare 5
相關PDF資料
PDF描述
MC68HCP11A1CFN2 HCMOS Single-Chip Microcontroller
MC68HCP11A1CFN3 HCMOS Single-Chip Microcontroller
MC68HCP11A1CP2 HCMOS Single-Chip Microcontroller
MC68HCP11A1CP3 HCMOS Single-Chip Microcontroller
MC68HCP11A1MFN2 HCMOS Single-Chip Microcontroller
相關代理商/技術參數
參數描述
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 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 安裝風格:SMD/SMT
MC68HC11A1CFU2 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:HCMOS Single-Chip Microcontroller
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