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參數(shù)資料
| 型號(hào)： | GMS81C1408 |
| 英文描述： | [General Purpose(2) : ADC/ LED/ SCI/ PWM] |
| 中文描述： | [通用（2）：藝術(shù)發(fā)展局/發(fā)光/工商/脈寬調(diào)制] |
| 文件頁(yè)數(shù)： | 25/93頁(yè) |
| 文件大?。?/td> | 853K |
| 代理商： | GMS81C1408 |
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GMS81C1404/GMS81C1408
June. 2001 Ver 1.2
23
Figure 9-3 PSW (Program Status Word) Register
[Interrupt disable flag I]
This flag enables/disables all interrupts except interrupt
caused by Reset or software BRK instruction. All inter-
rupts are disabled when cleared to “0”. This flag immedi-
ately becomes “0” when an interrupt is served. It is set by
the EI instruction and cleared by the DI instruction.
[Half carry flag H]
After operation, this is set when there is a carry from bit 3
of ALU or there is no borrow from bit 4 of ALU. This bit
can not be set or cleared except CLRV instruction with
Overflow flag (V).
[Break flag B]
This flag is set by software BRK instruction to distinguish
BRK from TCALL instruction with the same vector ad-
dress.
[Overflow flag V]
This flag is set to “1” when an overflow occurs as the result
of an arithmetic operation involving signs. An overflow
occurs when the result of an addition or subtraction ex-
ceeds +127(7F
H
) or -128(80
H
). The CLRV instruction
clears the overflow flag. There is no set instruction. When
the BIT instruction is executed, bit 6 of memory is copied
to this flag.
[Negative flag N]
This flag is set to match the sign bit (bit 7) status of the re-
sult of a data or arithmetic operation. When the BIT in-
struction is executed, bit 7 of memory is copied to this flag.
N
NEGATIVE FLAG
V
-
B
H
I
Z
C
MSB
LSB
RESET VALUE: 00
H
PSW
OVERFLOW FLAG
BRK FLAG
CARRY FLAG RECEIVES
CARRY OUT
ZERO FLAG
INTERRUPT ENABLE FLAG
HALF CARRY FLAG RECEIVES
CARRY OUT FROM BIT 1 OF
ADDITION OPERLANDS
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參數(shù)描述 |
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| GMS81C1408D | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C1408ED | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C1408E-HG | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C1408E-HGXXX | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS81C1408ESK | 制造商:未知廠(chǎng)家 制造商全稱(chēng):未知廠(chǎng)家 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
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