參數資料
型號: UPD77019GC-013-9EU
廠商: NEC Corp.
元件分類: 數字信號處理
英文描述: 16 bits, Fixed-point Digital Signal Processor
中文描述: 16位定點數字信號處理器
文件頁數: 16/56頁
文件大?。?/td> 261K
代理商: UPD77019GC-013-9EU
μ
PD77019-013
16
Preliminary Data Sheet
2. FUNCTIONS
2.1 Pipeline Processing
This section describes the
μ
PD77019-013 pipeline processing.
2.1.1 Outline
The
μ
PD77019-013 basic operations are executed in following 3-stage pipeline.
(1) instruction fetch; if
(2) Instruction decoding; id
(3) execution; ex
When the
μ
PD77019-013 operates a result of a instruction just executed before, the data is input to ALU in
parallel with written back to general registers. Pipeline processing actualizes programming without delay time
to execute instructions and write back data. Three successive instructions and their processing timing are shown
below.
Pipeline Processing Timing
2.1.2 Instructions with Delay
The following instructions have delay time in execution.
(1) Instructions to control interrupt
2 instruction cycles have been taken between instruction fetch and execution.
(2) Inter-register transfer instructions and immediate data set instructions
When data is set in data pointer, it needs 2 instruction cycles before the data is valid.
if1
id1
ex1
if2
id2
ex2
if3
id3
ex3
1 instruction cycle
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