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參數(shù)資料
| 型號(hào)： | MC9S08QD4CPC |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 16 MHz, MICROCONTROLLER, PDIP8 |
| 封裝： | ROHS COMPLIANT, PLASTIC, DIP-8 |
| 文件頁(yè)數(shù)： | 119/198頁(yè) |
| 文件大小： | 2473K |
| 代理商： | MC9S08QD4CPC |
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Chapter 3 Modes of Operation
MC9S08QD4 Series MCU Data Sheet, Rev. 6
Freescale Semiconductor
27
the CPU executes a STOP instruction, the MCU will not enter either of the stop modes and an illegal
opcode reset is forced. The stop modes are selected by setting the appropriate bits in SPMSC2.
HCS08 devices that are designed for low voltage operation (1.8V to 3.6V) also include stop1 mode. The
MC9S08QD4 series does not include stop1 mode.
Table 3-1 summarizes the behavior of the MCU in each of the stop modes.
3.6.1
Stop2 Mode
The stop2 mode provides very low standby power consumption and maintains the contents of RAM and
the current state of all of the I/O pins. To enter stop2, the user must execute a STOP instruction with stop2
selected (PPDC = 1) and stop mode enabled (STOPE = 1). In addition, the LVD must not be enabled to
operate in stop (LVDSE = 0 or LVDE = 0). If the LVD is enabled in stop, then the MCU enters stop3 upon
the execution of the STOP instruction regardless of the state of PPDC.
Before entering stop2 mode, the user must save the contents of the I/O port registers, as well as any other
memory-mapped registers which they want to restore after exit of stop2, to locations in RAM. Upon exit
of stop2, these values can be restored by user software before pin latches are opened.
When the MCU is in stop2 mode, all internal circuits that are powered from the voltage regulator are turned
off, except for the RAM. The voltage regulator is in a low-power standby state, as is the ADC. Upon entry
into stop2, the states of the I/O pins are latched. The states are held while in stop2 mode and after exiting
stop2 mode until a logic 1 is written to PPDACK in SPMSC2.
Exit from stop2 is done by asserting either of the wake-up pins: RESET or IRQ, or by an RTI interrupt.
IRQ is always an active low input when the MCU is in stop2, regardless of how it was configured before
entering stop2.
NOTE
Although this IRQ pin is automatically configured as active low input, the
pullup associated with the IRQ pin is not automatically enabled. Therefore,
if an external pullup is not used, the internal pullup must be enabled by
setting IRQPE in IRQSC.
Upon wake-up from stop2 mode, the MCU will start up as from a power-on reset (POR) except pin states
remain latched. The CPU will take the reset vector. The system and all peripherals will be in their default
reset states and must be initialized.
Table 3-1. Stop Mode Behavior
Mode
PPDC
CPU, Digital
Peripherals,
Flash
RAM
ICS
ADC1
Regulator
I/O Pins
RTI
Stop2
1
Off
Standby
Off
Disabled
Standby
States held
Optionally on
Stop3
0
Standby
Off1
1 ICS can be configured to run in stop3. Please see the ICS registers.
Optionally on
Standby
States held
Optionally on
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MC9S08QD4CPS | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit HCS08 Central Processor Unit (CPU) |
| MC9S08QD4CSC | 功能描述:8位微控制器 -MCU 9S08QD4 SERIES 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 |
| MC9S08QD4CSCR | 功能描述:8位微控制器 -MCU 9S08QD4 SERIES 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 |
| MC9S08QD4MPC | 功能描述:8位微控制器 -MCU 9S08QD4 SERIES 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 |
| MC9S08QD4MPS | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:8-Bit HCS08 Central Processor Unit (CPU) |
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