參數(shù)資料
型號(hào): MC13211
廠(chǎng)商: FREESCALE SEMICONDUCTOR INC
元件分類(lèi): 微控制器/微處理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, PBGA71
封裝: 9 X 9 MM, 1 MM HEIGHT, LGA-71
文件頁(yè)數(shù): 293/372頁(yè)
文件大小: 3946K
代理商: MC13211
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Development Support
MC1321x Reference Manual, Rev. 1.6
21-10
Freescale Semiconductor
21.3.3
Change-of-Flow Information
To minimize the amount of information stored in the FIFO, only information related to instructions that
cause a change to the normal sequential execution of instructions is stored. With knowledge of the source
and object code program stored in the target system, an external debugger system can reconstruct the path
of execution through many instructions from the change-of-flow information stored in the FIFO.
For conditional branch instructions where the branch is taken (branch condition was true), the source
address is stored (the address of the conditional branch opcode). Because BRA and BRN instructions are
not conditional, these events do not cause change-of-flow information to be stored in the FIFO.
Indirect JMP and JSR instructions use the current contents of the H:X index register pair to determine the
destination address, so the debug system stores the run-time destination address for any indirect JMP or
JSR. For interrupts, RTI, or RTS, the destination address is stored in the FIFO as change-of-flow
information.
21.3.4
Tag vs. Force Breakpoints and Triggers
Tagging is a term that refers to identifying an instruction opcode as it is fetched into the instruction queue,
but not taking any other action until and unless that instruction is actually executed by the CPU. This
distinction is important because any change-of-flow from a jump, branch, subroutine call, or interrupt
causes some instructions that have been fetched into the instruction queue to be thrown away without being
executed.
A force-type breakpoint waits for the current instruction to finish and then acts upon the breakpoint
request. The usual action in response to a breakpoint is to go to Active Background Mode rather than
continuing to the next instruction in the user application program.
The tag vs. force terminology is used in two contexts within the debug module. The first context refers to
breakpoint requests from the debug module to the CPU. The second refers to match signals from the
comparators to the debugger control logic. When a tag-type break request is sent to the CPU, a signal is
entered into the instruction queue along with the opcode so that if/when this opcode ever executes, the
CPU will effectively replace the tagged opcode with a BGND opcode so the CPU goes to Active
Background Mode rather than executing the tagged instruction. When the TRGSEL control bit in the
DBGT register is set to select tag-type operation, the output from comparator A or B is qualified by a block
of logic in the debug module that tracks opcodes and only produces a trigger to the debugger if the opcode
at the compare address is actually executed. There is separate opcode tracking logic for each comparator
so more than one compare event can be tracked through the instruction queue at a time.
21.3.5
Trigger Modes
The Trigger Mode controls the overall behavior of a debug run. The 4-bit TRG field in the DBGT register
selects one of nine Trigger Modes. When TRGSEL = 1 in the DBGT register, the output of the comparator
must propagate through an opcode tracking circuit before triggering FIFO actions. The BEGIN bit in
DBGT chooses whether the FIFO begins storing data when the qualified trigger is detected (begin trace),
or the FIFO stores data in a circular fashion from the time it is armed until the qualified trigger is detected
(end trigger).
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MC13211_08 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:ZigBee⑩- Compliant Platform -2.4 GHz Low Power Transceiver for the IEEE㈢ 802.15.4 Standard plus Microcontroller
MC13211R2 功能描述:射頻收發(fā)器 SIP 802.15.4 2.4GHZ 16KB RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類(lèi)型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類(lèi)型:SPI 封裝 / 箱體:QFN-32 封裝:Tray
MC13212 功能描述:射頻收發(fā)器 TOROWEAP IC 32K RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類(lèi)型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類(lèi)型:SPI 封裝 / 箱體:QFN-32 封裝:Tray
MC13212R2 功能描述:射頻收發(fā)器 SIP 802.15.4 2.4GHZ 32KB RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類(lèi)型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類(lèi)型:SPI 封裝 / 箱體:QFN-32 封裝:Tray
MC13213 功能描述:射頻收發(fā)器 TOROWEAP IC 60K RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類(lèi)型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類(lèi)型:SPI 封裝 / 箱體:QFN-32 封裝:Tray