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參數(shù)資料
| 型號(hào)： | SC9RS08KA1J3CDB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO6 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, DFN-6 |
| 文件頁數(shù)： | 68/134頁 |
| 文件大?。?/td> | 3114K |
| 代理商： | SC9RS08KA1J3CDB |
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Chapter 5 Resets, Interrupts, and General System Control
SC9RS08KA2 Series Data Sheet, Rev. 1
Freescale Semiconductor
39
5.8.2
System Options Register (SOPT)
This high page register is a write-once register so only the first write after reset is honored. It can be read
at any time. Any subsequent attempt to write to SOPT (intentionally or unintentionally) is ignored to avoid
accidental changes to these sensitive settings. SOPT must be written during the user’s reset initialization
program to set the desired controls even if the desired settings are the same as the reset settings.
1. When the device is reset into normal operating mode (MS is high during reset), BKGDPE is reset to 1 if Flash security is
disengaged (SECD = 1); BKGDPE is reset to 0 if Flash security is engaged (SECD = 0). When the device is reset into active
BDM mode (MS is low during reset), BKGDPE is always reset to 1 such that BDM communication is allowed.
Table 5-2. SRS Field Descriptions
Field
Description
7
POR
Power-On Reset — Reset was caused by the power-on detection logic. Because the internal supply voltage was
ramping up at the time, the low-voltage reset (LVR) status bit is also set to indicate that the reset occurred while
the internal supply was below the LVR threshold.
0 Reset not caused by POR.
1 POR caused reset.
6
PIN
External Reset Pin — Reset was caused by an active-low level on the external reset pin.
0 Reset not caused by external reset pin.
1 External reset pin caused reset.
5
COP
Computer Operating Properly (COP) Watchdog — Reset was caused by the COP watchdog timer timing out.
This reset source can be blocked by COPE = 0.
0 Reset not caused by COP timeout.
1 COP timeout caused reset.
4
ILOP
Illegal Opcode — Reset was caused by an attempt to execute an unimplemented or illegal opcode. The STOP
instruction is considered illegal if stop is disabled by STOPE = 0 in the SOPT register. The BGND instruction is
considered illegal if active background mode is disabled by ENBDM = 0 in the BDCSC register.
0 Reset not caused by an illegal opcode.
1 An illegal opcode caused reset.
3
ILAD
Illegal Address — Reset was caused by an attempt to access either data or an instruction at an unimplemented
memory address.
0 Reset not caused by an illegal address.
1 An illegal address caused reset.
1
LVD
Low Voltage Detect — If the LVDRE bit is set and the supply drops below the LVD trip voltage, an LVD reset will
occur. This bit is also set by POR.
0 Reset not caused by LVD trip or POR.
1 Either LVD trip or POR caused reset.
76
54
321
0
R
COPE
COPT
STOPE
00
0
BKGDPE
RSTPE
W
Reset:
1
0
1 (Note 1)
u
POR:
110
00
0
1 (Note1)
0
= Unimplemented or Reserved
u = Unaffected
Figure 5-2. System Options Register 1 (SOPT)
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| SC9RS08KA1J3CPC | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers |
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| SC9RS08KA2J3CPC | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RS08 Microcontrollers |
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