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參數(shù)資料
| 型號： | AT75C |
| 英文描述： | AT75C DSP Subsystem [Updated . 171 Pages] The AT75C DSP subsystem is a fully autonomous DSP-based computation block. It is built around a 16-bit. fixed-point. industry standard OakDSPCore. Additionally. the DSP subsystem embeds all elements necessary to run complex DSP algorithms independently. |
| 中文描述： | AT75C DSP子系統(tǒng)[更新。 171頁]的AT75C DSP子系統(tǒng)是一個完全獨立的基于DSP的計算塊。這是圍繞一個16位。定點。行業(yè)標準OakDSPCore。此外。嵌入了DSP子系統(tǒng)的所有元素需要運行復雜的DSP算法獨立。 |
| 文件頁數(shù)： | 6/171頁 |
| 文件大?。?/td> | 1288K |
| 代理商： | AT75C |
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103
AT75C DSP Subsystem
1368C–INTAP–08/02
RETD – Delayed Return
Syntax:
retd
Operation:
(sp) –> temporary storage
sp + 1 –> sp
One two-cycle instruction or two one-cycle instructions are executed.
Temporary storage –> pc
Delayed return. The two single-cycle instructions, or one two-cycle
instruction (
brr; callr; rep; trap; retd; retid; mov operand, pc; pop pc)
are/is fetched and executed before executing the return. When
returned, the program counter (pc) is pulled from the software stack,
while the previous program counter is lost; the stack pointer (sp) is post-
incremented. This instruction is used to obtain a delayed return from
subroutines or interrupts.
The
retd instruction and the instruction(s) that follow the retd (two one-
cycle instructions or one two-cycle instruction) cannot be interrupted.
Affected Flags:
Cycles:
1
Words:
1
Notes:
The
retd instruction and the two following cycles are uninterruptible.
The two cycles following a retd cannot be instructions that break the
pipeline:
brr; callr; rep; trap; retd; retid; mov operand, pc; pop pc;
addv/subv/set/rst/chng/ ##long immediate, pc.
This instruction can also be used as return from the maskable interrupts
service routines (INT0 or INT1 or INT2) to enable additional interrupts,
the IE bit at st0 must be set by the user.
The retd instruction cannot follow the following instructions:
mov soperand, sp (except for mov ##long immediate, sp)
movp (aXl), sp; addv/subv/set/rst/chng ##long immediate, sp
Z
M
NVCE
L
R
––––––––
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| AT75C1212 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AT75C1212 G.723.1 Voice Processing and Multi-way Conferencing Software Module [Updated 7/02. 41 Pages] This software module provides G.723.1 voice processing and multi-way conferencing. including algorithms for silence compression. tone generation. DTMF detection and echo cancellation that run on the OakDSPCore subsystem of the AT75C SIAP. All these algorithms have a number of parameters that can be programmed at run time. |
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