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參數(shù)資料
| 型號： | ST20GP6 |
| 英文描述： | MAX 7000 CPLD 256 MC 208-RQFP |
| 中文描述： | GPS處理器 |
| 文件頁數(shù)： | 24/116頁 |
| 文件大?。?/td> | 1107K |
| 代理商： | ST20GP6 |
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ST20-GP1
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Figure 4.4 Trap arrangement
There are four groups of traps, as detailed below.
Breakpoint
This group consists of the Breakpointtrap. The breakpoint instruction (j0) calls the break-
point routine via the trap mechanism.
Errors
The traps in this group are IntegerError and Overflow Overflow represents arithmetic over-
flow, such as arithmetic results which do not fit in the result word. IntegerError represents
errors caused when data is erroneous, for example when a range checking instruction finds
that data is out of range.
System operations
This group consists of the LoadTrap StoreTrapand IllegalOpcodetraps. The IllegalOpcode
trap is signalled when an attempt is made to execute an illegal instruction. The LoadTrap
and StoreTrap traps allow a kernel to intercept attempts by a monitored process to change
or examine trap handlers or trapped process information. It enables a user program to sig-
nal to a kernel that it wishes to install a new trap handler.
Scheduler
The scheduler trap group consists of the ExternalChannel, InternalChannel, Timer, TimeS-
lice, Run, Signal, ProcessInterruptand QueueEmptytraps. The ProcessInterrupttrap sig-
nals that the machine has performed a priority interrupt from low to high. The QueueEmpty
trap indicates that there is no further executable work to perform. The other traps in this
group indicate that the hardware scheduler wants to schedule a process on a process
queue, with the different traps enabling the different sources of this to be monitored.
The scheduler traps enable a software scheduler kernel to use the hardware scheduler to
implement a multi-priority software scheduler.
Note that scheduler traps are different from other traps as they are caused by the micro-
scheduler rather than by an executing process.
Note, when the scheduler trap is caused by a process that is ready to be scheduled, the
Wptr
of that process is stored in the workspace of the scheduler trap handler, at address 0.
The trap handler can access this using a ldl 0 nstruction.
Low priority traps
High priority traps
Breakpoint
CPU Error
System operations
Scheduler
Breakpoint
CPU Error
System operations
Scheduler
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ST20-GP6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP6CT33S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
| ST20GP6CX33S | 功能描述:射頻無線雜項 GPS Processor RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| ST20GP6CX33STR | 功能描述:射頻無線雜項 GPS Processor RoHS:否 制造商:Texas Instruments 工作頻率:112 kHz to 205 kHz 電源電壓-最大:3.6 V 電源電壓-最小:3 V 電源電流:8 mA 最大功率耗散: 工作溫度范圍:- 40 C to + 110 C 封裝 / 箱體:VQFN-48 封裝:Reel |
| ST20GP6X33S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:GPS PROCESSOR |
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