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參數(shù)資料
| 型號(hào)： | MC68HC11P1CFN3R2 |
| 廠商： | MOTOROLA INC |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, EEPROM, 3 MHz, MICROCONTROLLER, PQCC84 |
| 封裝： | PLASTIC, LCC-84 |
| 文件頁(yè)數(shù)： | 86/236頁(yè) |
| 文件大小： | 1232K |
| 代理商： | MC68HC11P1CFN3R2 |
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MOTOROLA
10-16
MC68HC11P2
RESETS AND INTERRUPTS
10
The SPI system is enabled or disabled by the SPE control bit. The SCI transmitter is enabled or
disabled by the TE bit, and the SCI receiver is enabled or disabled by the RE bit. Therefore the
power consumption in WAIT is dependent on the particular application.
10.5.2
STOP
Executing the STOP instruction while the S-bit in the CCR is equal to zero places the MCU in the
STOP condition. If the S-bit is not zero, the STOP opcode is treated as a no-op (NOP). The STOP
condition offers minimum power consumption because all clocks, including the crystal oscillator,
are stopped while in this mode. To exit STOP and resume normal processing, a logic low level
must be applied to one of the external interrupts (IRQ or XIRQ) or to the RESET pin. A pending
edge-triggered IRQ can also bring the CPU out of STOP.
Because all clocks are stopped in this mode, all internal peripheral functions also stop. The data
in the internal RAM is retained as long as VDD power is maintained. The CPU state and I/O pin
levels are static and are unchanged by STOP. Therefore, when an interrupt comes to restart the
system, the MCU resumes processing as if there were no interruption. If reset is used to restart
the system a normal reset sequence results where all I/O pins and functions are also restored to
their initial states.
To use the IRQ pin as a means of recovering from STOP, the I-bit in the CCR must be clear (IRQ
not masked). The XIRQ pin can be used to wake up the MCU from STOP regardless of the state
of the X-bit in the CCR, although the recovery sequence depends on the state of the X-bit. If X is
set to zero (XIRQ not masked), the MCU starts up, beginning with the stacking sequence leading
to normal service of the XIRQ request. If X is set to one (XIRQ masked or inhibited), then
processing continues with the instruction that immediately follows the STOP instruction, and no
XIRQ interrupt service is requested or pending.
Because the oscillator is stopped in STOP mode, a restart delay may be imposed to allow
oscillator stabilization upon leaving STOP. If the internal oscillator is being used, this delay is
required; however, if a stable external oscillator is being used, the DLY control bit can be used to
bypass this start-up delay. The DLY control bit is set by reset and can be optionally cleared during
initialization. If the DLY equal to zero option is used to avoid start-up delay on recovery from STOP,
then reset should not be used as the means of recovering from STOP, as this causes DLY to be
set again by reset, imposing the restart delay. This same delay also applies to power-on-reset,
regardless of the state of the DLY control bit, but does not apply to a reset while the clocks are
running.
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| MC68HC11P3CFN4R2 | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQCC84 |
| MC68HC11P1CFN4R2 | 8-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PQCC84 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC68HC16Z1CAG | 制造商:Freescale Semiconductor 功能描述: |
| MC68HC16Z1CAG16 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG16 | 制造商:Freescale Semiconductor 功能描述:IC16-BIT MICROCONTROLLER |
| MC68HC16Z1CAG20 | 功能描述:16位微控制器 - MCU 16 BIT MCU 1K RAM RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時(shí)鐘頻率:24 MHz 程序存儲(chǔ)器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| MC68HC16Z1CAG20 | 制造商:Freescale Semiconductor 功能描述:Microcontroller |
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