參數(shù)資料
型號： TMS320VC203
廠商： Texas Instruments, Inc.
元件分類： 數(shù)字信號處理
英文描述： Digital Signal Processors(50ns指令周期， 空閑狀態(tài)CPU全關(guān)斷，先進(jìn)的外圍，多種PLL可選)
中文描述： 數(shù)字信號處理器（50ns的指令周期，空閑狀態(tài)CPU的全關(guān)斷，先進(jìn)的外圍，多種鎖相環(huán)可選）
文件頁數(shù)： 33/67頁
文件大小： 1452K
代理商： TMS320VC203
TMS320C203, TMS320C209, TMS320VC203
DIGITAL SIGNAL PROCESSORS
SPRS025 – JUNE 1995
33
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
Table 15. Opcode Symbols
SYMBOL
DESCRIPTION
A
Address
ACC
Accumulator
ACCB
Accumulator buffer
ARX
Auxiliary register value (0–7)
BITX
4-bit field specifies which bit to test for the BIT instruction
BMAR
Block-move address register
DBMR
Dynamic bit-manipulation register
I
Addressing-mode bit
II...II
Immediate operand value
INTM
Interrupt-mode flag bit
INTR#
Interrupt vector number
N
Field for the XC instruction, indicating the number of instructions (one or two) to execute conditionally
PREG
Product register
PROG
Program memory
RPTC
Repeat counter
SHF, SHFT
3/4 bit shift value
TC
Test-control bit
T P
Two bits used by the conditional execution instructions to represent the conditions TC, NTC, and BIO.
T P
Meaning
0 0
BIO low
0 1
TC=1
1 0
TC=0
1 1
None of the above conditions
TREGn
Temporary register n (n = 0, 1, or 2)
Z L V C
4-bit field representing the following conditions:
Z:
ACC = 0
L:
ACC < 0
V:
Overflow
C:
Carry
A conditional instruction contains two of these 4-bit fields. The 4-LSB field of the instruction is a 4-bit mask field. A 1 in the
corresponding mask bit indicates that the condition is being tested. The second 4-bit field (bits 4–7) indicates the state of
the conditions designated by the mask bits as being tested. For example, to test for ACC
≥
0, the Z and L fields are set while
the V and C fields are not set. The next 4-bit field contains the state of the conditions to test. The Z field is set to indicate
testing the condition ACC = 0, and the L field is reset to indicate testing the condition ACC
≥
0. The conditions possible with
these 8 bits are shown in the BCND, CC, and XC instructions. To determine if the conditions are met, the 4-LSB bit mask
is ANDed with the conditions. If any bits are set, the conditions are met.
A
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