參數(shù)資料
型號(hào): TMS320VC5409ZGU100
廠(chǎng)商: Texas Instruments
文件頁(yè)數(shù): 21/93頁(yè)
文件大?。?/td> 0K
描述: IC FIXED POINT DSP 144-BGA
標(biāo)準(zhǔn)包裝: 160
系列: TMS320C54x
類(lèi)型: 定點(diǎn)
接口: 主機(jī)接口,McBSP
時(shí)鐘速率: 100MHz
非易失內(nèi)存: ROM(32 kB)
芯片上RAM: 64kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.80V
工作溫度: -40°C ~ 100°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 144-LFBGA
供應(yīng)商設(shè)備封裝: 144-BGA MICROSTAR(12x12)
包裝: 托盤(pán)
配用: 296-15829-ND - DSP STARTER KIT FOR TMS320C5416
Functional Overview
28
April 1999 Revised October 2008
SPRS082F
3.2.5 Relocatable Interrupt Vector Table
The reset, interrupt, and trap vectors are addressed in program space. These vectors are soft — meaning that
the processor, when taking the trap, loads the program counter (PC) with the trap address and executes the
code at the vector location. Four words are reserved at each vector location to accommodate a delayed branch
instruction, either two 1-word instructions or one 2-word instruction, which allows branching to the appropriate
interrupt service routine with minimal overhead.
At device reset, the reset, interrupt, and trap vectors are mapped to address FF80h in program space.
However, these vectors can be remapped to the beginning of any 128-word page in program space after
device reset. This is done by loading the interrupt vector pointer (IPTR) bits in the PMST register with the
appropriate 128-word page boundary address. After loading IPTR, any user interrupt or trap vector is mapped
to the new 128-word page.
NOTE:The hardware reset (RS) vector cannot be remapped because a hardware reset loads
the IPTR with 1s. Therefore, the reset vector is always fetched at location FF80h in program
space.
3.2.6 Extended Program Memory
The 5409 CPU uses a paged extended memory scheme in program space to allow access of up to 8M program
memory locations. In order to implement this scheme, the 5409 includes several features that are also present
on the 548/549 devices:
Twenty-three address lines, instead of sixteen
An extra memory-mapped register, the XPC register defines the page selection. This register is
memory-mapped into data space to address 001Eh. At a hardware reset, the XPC is initialized to 0.
Six extra instructions for addressing extended program space. These six instructions affect the XPC.
FB[D] pmad (23 bits) Far branch
FBACC[D] Accu[22:0] Far branch to the location specified by the value in accumulator A or
accumulator B
FCALL[D] pmad (23 bits) Far call
FCALA[D] Accu[22:0] Far call to the location specified by the value in accumulator A or
accumulator B
FRET[D] Far return
FRETE[D] Far return with interrupts enabled
In addition to these new instructions, two 54x instructions are extended to use 23 bits in the 5409:
READA data_memory (using 23-bit accumulator address)
WRITA data_memory (using 23-bit accumulator address)
All other instructions, software interrupts, and hardware interrupts do not modify the XPC register and access
only memory within the current page.
Program memory in the 5409 is organized into 127 pages that are each 64K in length, as shown in Figure 36.
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