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參數(shù)資料
| 型號： | UPD77114GC-XXX-9EU |
| 廠商： | NEC Corp. |
| 英文描述： | MOS INTEGRATED CIRCUIT |
| 中文描述： | 馬鞍山集成電路 |
| 文件頁數(shù)： | 32/62頁 |
| 文件大?。?/td> | 352K |
| 代理商： | UPD77114GC-XXX-9EU |
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Data Sheet U14373EJ3V0DS
32
μ
PD77113A, 77114
(b) Modifying data pointer
The data pointer is modified after the memory has been accessed. The result of modification becomes valid
starting from the instruction that immediately follows. The data pointer cannot be modified.
Example
Operation
DPn
Nothing is done (value of DPn is not changed.)
DPn++
DPn
←
DPn + 1
DPn
DPn
←
DPn
1
DPn##
DPn
←
DPn + DNn
(Adds value of corresponding DN0 to DN7 to DP0 to DP7.)
Example: DP0
←
DP0 + DN0
(n = 0 - 3) DPn = ((DP
L
+ DNn) mod (DMX + 1)) + DP
H
DPn%%
(n = 4 - 7) DPn = ((DP
L
+ DNn) mod (DMY + 1)) + DP
H
!DPn##
Reverses bits of DPn and then accesses memory.
After memory access, DPn
←
DPn + DNn
DPn##imm
DPn
←
DPn + imm
(c) Instructions that can be simultaneously written
Instructions that can be simultaneously written are indicated by
√
.
(d) Status of overflow flag (OV)
The status of the overflow flag is indicated by the following symbol:
z
: Not affected
: Set to 1 when overflow occurs
Caution If an overflow does not occur as a result of an operation, the overflow flag is not reset but
retains the status before the operation.
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