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參數(shù)資料
| 型號(hào)： | UPD17235MC |
| 廠商： | NEC Corp. |
| 元件分類(lèi)： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機(jī)的小型通用紅外遙控器 |
| 文件頁(yè)數(shù)： | 18/92頁(yè) |
| 文件大?。?/td> | 378K |
| 代理商： | UPD17235MC |
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Data Sheet U14360EJ1V0DS00
μ
PD17230, 17231, 17232, 17233, 17234, 17235, 17236
18
2.3.2
Function of stack
The address stack register stores a return address when the subroutine call instruction or table reference
instruction (first instruction cycle) is executed or when an interrupt is accepted. It also stores the contents of the
address registers (ARs) when a stack manipulation instruction (PUSH AR) is executed.
If subroutines or interrupts are nested to more than 5 levels, the RESET pin is internally pulled down and
a reset is effected.
The interrupt stack register (INTSK) saves the contents of the bank register (BANK) and program status word
(PSWORD) when an interrupt is accepted. The saved contents are restored when an interrupt return (RETI) instruction
is executed.
INTSK saves data each time an interrupt is accepted, but
the data stored first is lost if more than 3 levels of
interrupts occur
.
2.3.3
Stack Pointer (SP) and Interrupt Stack Pointer
Table 2-3 shows the operations of the stack pointer (SP).
The stack pointer can take eight values, 0H-07. Because there are only five stack registers available, however,
the RESET pin is internally pulled down and reset is effected if the value of SP is 6 or greater
.
Table 2-3. Operations of Stack Pointer
Instruction
Value of Stack Pointer (SP)
Counter of Interrupt Stack Register
CALL addr
CALL @AR
MOVT DBF, @AR
–1
0
(1st Instruction Cycle)
PUSH AR
SYSCAL entry
When interrupt is accepted
–1
–1
RET
RETSK
MOVT DBF, @AR
+1
0
(2nd Instruction Cycle)
POP AR
RETI
+1
+1
相關(guān)PDF資料 |
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|---|---|
| UPD17236 | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17236GT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17236MC | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17230 | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17231 | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| UPD17236 | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17236GT | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17236MC | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD1723GF-011-3BE | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
| UPD1723GF-013 | 制造商:NEC 制造商全稱(chēng):NEC 功能描述:PLL FREQUENCY SYNTHESIZER AND CONTROLLER FOR FM/MW/LF TUNER CAR AUDIO |
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