参数资料
型号: COP8SGE740M3
厂商: National Semiconductor Corporation
英文描述: LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators; Package: TO-92; No of Pins: 3
中文描述: 8位的CMOS基于ROM和OTP微控制器具有8K到32K的内存,2个比较器和USART
文件页数: 37/62页
文件大小: 913K
代理商: COP8SGE740M3
10.0 Interrupts
(Continued)
10.3.1 VIS Execution
When the VIS instruction is executed it activates the arbitra-
tion logic. The arbitration logic generates an even number
between E0 and FE (E0, E2, E4, E6 etc...) depending on
which active interrupt has the highest arbitration ranking at
the time of the 1st cycle of VIS is executed. For example, if
the software trap interrupt is active, FE is generated. If the
external interrupt is active and the software trap interrupt is
not, then FA is generated and so forth. If the only active
interrupt is software trap, than E0 is generated. This number
replaces the lower byte of the PC. The upper byte of the PC
remains unchanged. The new PC is therefore pointing to the
vector of the active interrupt with the highest arbitration
ranking. This vector is read from program memory and
placed into the PC which is now pointed to the 1st instruction
of the service routine of the active interrupt with the highest
arbitration ranking.
Figure 26 illustrates the different steps performed by the VIS
instruction. Figure 27 shows a flowchart for the VIS instruc-
tion.
The non-maskable interrupt pending flag is cleared by the
RPND (Reset Non-Maskable Pending Bit) instruction (under
certain conditions) and upon RESET.
10131729
FIGURE 26. VIS Operation
C
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相关PDF资料
PDF描述
COP8SGE740M6 LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators; Package: TO-92; No of Pins: 3
COP8SGE740M7 LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators; Package: TO-92; No of Pins: 3
COP8SGE740M8 LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators; Package: TO-252; No of Pins: 3
COP8SGE740M9 LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators; Package: TO-252; No of Pins: 3
COP8SGE740N3 LP2950/LP2951 Series of Adjustable Micropower Voltage Regulators; Package: TO-252; No of Pins: 3
相关代理商/技术参数
参数描述
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