參數(shù)資料
型號: MC68CK338CPV14B1
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): 48/133頁
文件大?。?/td> 944K
代理商: MC68CK338CPV14B1
MC68CK338
MOTOROLA
MC68CK338TS/D
21
Figure 8 LPSTOP Flowchart
SETUP INTERRUPT
TO WAKE UP MCU
FROM LPSTOP
LEAVE IMBCLK1
ON IN LPSTOP?
NO
YES
SET STOP BITS FOR
MODULES THAT WILL
NOT BE ACTIVE IN
LPSTOP
SET STCPU2 = 1
fimbclk = fsys
IN LPSTOP
SET STCPU2 = 0
fimbclk = 0 Hz
IN LPSTOP
USING
EXTERNAL CLOCK?
NO
YES
USE SYSTEM CLOCK
AS SIMCLK IN LPSTOP?
NO
YES
SET STSIM = 1
fsimclk
3 = f
sys
IN LPSTOP
WANT CLKOUT
ON IN LPSTOP?
NO
YES
NO
YES
WANT CLKOUT
ON IN LPSTOP?
SET STSIM = 0
fsimclk
3 = f
ref
IN LPSTOP
SET STEXT = 1
fclkout
4 = f
sys
feclk = ÷ fsys
IN LPSTOP
SET STEXT = 0
fclkout
4 = 0 Hz
feclk = ÷ 0 Hz
IN LPSTOP
SET STEXT = 1
fclkout
4 = f
ref
feclk = ÷ 0 Hz
IN LPSTOP
SET STEXT = 0
fclkout
4 = 0 Hz
feclk = ÷ 0 Hz
IN LPSTOP
ENTER LPSTOP
NOTES:
1. IMBCLK IS THE CLOCK USED BY THE CPU32L, QSM, CTM6, AND THE SIML.
2. WHEN STCPU = 1, THE CPU32L IS SHUTDOWN IN LPSTOP. ALL OTHER MODULES WILL REMAIN ACTIVE UNLESS
THE STOP BITS IN THEIR MODULE CONFIGURATION REGISTERS ARE SET PRIOR TO ENTERING LPSTOP.
3. THE SIMCLK IS USED BY THE PIT, IRQ, AND INPUT BLOCKS OF THE SIML.
4. CLKOUT CONTROL DURING LPSTOP IS OVERRIDDEN BY THE EXOFF BIT IN SIMLCR. IF EXOFF = 1, THE CLKOUT
PIN IS ALWAYS IN A HIGH IMPEDANCE STATE AND STEXT HAS NO EFFECT IN LPSTOP. IF EXOFF = 0, CLKOUT
IS CONTROLLED BY STEXT IN LPSTOP. WHEN STCPU = 1, THE CPU32L IS DISABLED IN LPSTOP, BUT ALL OTHER
MODULES REMAIN ACTIVE OR STOPPED ACCORDING TO THE SETTING.
LPSTOP FLOWCHART
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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