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參數(shù)資料
| 型號： | UPD77016 |
| 廠商： | NEC Corp. |
| 元件分類： | 數(shù)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(shù)字信號處理器 |
| 文件頁數(shù)： | 23/56頁 |
| 文件大?。?/td> | 250K |
| 代理商： | UPD77016 |
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μ
PD77016
23
(b) Modifying data pointers
Data pointers are modified after memory access. The results are valid immediately after instruction execution.
It is impossible to modify without memory access.
Description
Operation
DPn
No operation: DPn value does not change.
DPn++
DPn
←
DPn+1
DPn–
–
DPn
←
DPn–1
DPn##
DPn
←
DPn + DNn: Adds DN0-DN7 corresponding to DP0-DP7
Example
DP0
←
DP0 + DN0
DPn%%
(n = 0 - 3) DP
n
= ((DP
L
+ DNn ) mod (DMX + 1)) + DP
H
(n = 4 - 7) DP
n
= ((DP
L
+ DNn ) mod (DMY + 1)) + DP
H
!DPn##
Access memory after DPn value is bit-reversed
After memory access, DPn
←
DPn + DNn
DPn##imm
DPn
←
DPn + imm
(c) Concurrent processing instructions
G
G
shows concurrent processing instruction.
Instruction names are shown in abbreviation.
TRI
: Trinomial
DYAD
: Dyadic
MONAD : Monadic
TRANS
: Inter-register transfer
IMM
: Immediate data set
BR
: Branch
LOOP
: Hardware loop
CTR
: Control
(d) State of Overflow flag (OV)
The following marks show the
μ
PD77016 overflow flag state.
: Not affected
: 1 is set when the result of operation is overflow.
Caution
If overflow does not occur after operation, OV is not reset, and keeps the state before operation.
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