- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69025 > MC68CK338CPV14 (FREESCALE SEMICONDUCTOR INC) 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144 PDF資料下載
參數(shù)資料
| 型號： | MC68CK338CPV14 |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 32-BIT, 14.4 MHz, MICROCONTROLLER, PQFP144 |
| 封裝： | PLASTIC, TQFP-144 |
| 文件頁數(shù)： | 47/133頁 |
| 文件大?。?/td> | 944K |
| 代理商： | MC68CK338CPV14 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁當前第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁
MOTOROLA
MC68CK338
20
MC68CK338TS/D
3.3.5 Low-Power Operation
Low-power operation is initiated by the CPU32L. To reduce power consumption selectively, the
CPU32L can enter the following low-power modes:
1.
The CPU32L can selectively disable a module by setting the module’s STOP bit.
2.
The CPU32L can execute the STOP instruction.
3.
The CPU32L can execute the LPSTOP instruction to stop the operations of only the CPU32L
or the entire MCU, including the CPU32L.
If the STOP bit in a module is set, then that module enters a low power mode. Some or all of that mod-
ule’s registers remain accessible. The module can be restarted by asserting RESET or by the CPU32L
clearing the module’s STOP bit.
The CPU32L can enter a low power mode by executing the STOP instruction. It can be reawakened by
RESET, trace or interrupt.
3.3.5.1 Normal LPSTOP mode
This low-power stop mode offers the greatest power reduction. To enter normal LPSTOP mode, the
CPU32L executes the LPSTOP instruction after clearing the STCPU bit in SYNCR. This causes the
SIML to turn off the system clock to most of the MCU.
When the CPU executes LPSTOP, a special CPU space bus cycle writes a copy of the current interrupt
mask into the clock control logic. The SIML brings the MCU out of normal LPSTOP mode when one of
the following exceptions occurs:
RESET
Trace
SIML interrupt of higher priority than the stored interrupt mask
During a LPSTOP, unless the system clock signal is supplied by an external source and that source is
removed, the SIML clock control logic and the SIML clock signal (SIMCLK) continue to operate. The
periodic interrupt timer and input logic for the RESET and IRQ pins are clocked by SIMCLK, and can
be used to bring the processor out of LPSTOP. The software watchdog monitor cannot perform this
function. Optionally, the SIML can also continue to generate the CLKOUT signal while in LPSTOP.
STSIM and STEXT bits in SYNCR determine clock operation during LPSTOP.
3.3.5.2 Modified LPSTOP mode
To enter modified LPSTOP mode, the CPU32L first sets the STCPU bit in SYNCR, then executes the
LPSTOP instruction. This causes the SIML to turn off the system clock to the CPU32L only. The other
MCU modules continue to operate. The SIML brings the MCU out of normal LPSTOP mode when one
of the following exceptions occurs:
RESET
Trace
Interrupt of higher priority than the stored interrupt mask from any MCU module
This low-power stop mode offers better power reduction than using the STOP instruction since the clock
in the CPU32L is held inactive. Also, the STOP bits of individual modules may be set or cleared, leaving
some active and others inactive. The flow chart shown in Figure 8 summarizes the effects of the
STCPU, STSIM, and STEXT bits when the MCU enters normal or modified LPSTOP mode.
NOTE
To keep power consumption to a minimum when in LPSTOP mode, do not allow
any spurious interrupts to occur. If a spurious interrupt occurs during LPSTOP
mode, the device will transition to the STOP mode (which has greater power
consumption) until a non-spurious interrupt request is detected by the CPU32L.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關PDF資料 |
PDF描述 |
|---|---|
| MC68EN360CRC25 | 32-BIT, 25 MHz, RISC MICROCONTROLLER, CPGA241 |
| MC68F333FE | 32-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, CQFP160 |
| MC68F333FC | 32-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP160 |
| MC68HC000L12F | 16-BIT, 16.67 MHz, MICROPROCESSOR, CDIP64 |
| MC68HC000L16 | 16-BIT, 16.67 MHz, MICROPROCESSOR, CDIP64 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MC68CK338CPV14B1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:32-Bit Modular Microcontroller |
| MC68CM16Z1 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
| MC68CM16Z1CFC16 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
| MC68CM16Z1CPV16 | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:M68HC16Z Series |
| MC68E360VR25VLR2 | 功能描述:微處理器 - MPU QUICC ETHRN RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324 |
發(fā)布緊急采購，3分鐘左右您將得到回復。