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參數(shù)資料
| 型號(hào)： | MC68CK338 |
| 廠商： | Motorola, Inc. |
| 元件分類： | 32位微控制器 |
| 英文描述： | Highly Integrated, Low-Power, 32-Bit Microcontroller |
| 中文描述： | 高度集成，低功耗，32位微控制器 |
| 文件頁(yè)數(shù)： | 21/133頁(yè) |
| 文件大小： | 798K |
| 代理商： | MC68CK338 |
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MC68CK338
MC68CK338TS/D
MOTOROLA
21
Figure 8 LPSTOP Flowchart
SETUP INTERRUPT
TO WAKE UP MCU
FROM LPSTOP
LEAVE IMBCLK
1
ON IN LPSTOP
NO
YES
SET STOP BITS FOR
MODULES THAT WILL
NOT BE ACTIVE IN
LPSTOP
SET STCPU
2
= 1
f
imbclk
= f
sys
IN LPSTOP
SET STCPU
2
= 0
f
imbclk
= 0 Hz
IN LPSTOP
USING
EXTERNAL CLOCK
NO
YES
USE SYSTEM CLOCK
AS SIMCLK IN LPSTOP
NO
YES
SET STSIM = 1
f
simclk3
= f
sys
IN LPSTOP
WANT CLKOUT
ON IN LPSTOP
NO
YES
NO
YES
WANT CLKOUT
ON IN LPSTOP
SET STSIM = 0
f
simclk3
= f
ref
IN LPSTOP
SET STEXT = 1
f
clkout4
= f
sys
f
eclk
=
÷
f
sys
IN LPSTOP
SET STEXT = 0
f
clkout4
= 0 Hz
f
eclk
=
÷
0 Hz
IN LPSTOP
SET STEXT = 1
f
clkout4
= f
ref
f
eclk
=
÷
0 Hz
IN LPSTOP
SET STEXT = 0
f
clkout4
= 0 Hz
f
eclk
=
÷
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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