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參數(shù)資料
| 型號： | UPD17147 |
| 廠商： | NEC Corp. |
| 英文描述： | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 小，通用4位單晶片微控制器 |
| 文件頁數(shù)： | 58/102頁 |
| 文件大小： | 408K |
| 代理商： | UPD17147 |
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58
μ
PD17145(A1), 17147(A1), 17149(A1)
17.2 HALT Mode
17.2.1 Setting HALT mode
The HALT mode is set when the HALT instruction is executed.
The operand of the HALT instruction, b
3
b
2
b
1
b
0
, specifies the condition under which the HALT mode is
released.
Table 17-2. HALT Mode Releasing Condition
Format: HALT b
3
b
2
b
1
b
0
B
Bit
HALT mode releasing condition
Note 1
b
3
Enables releasing HALT mode by IRQ
×××
when 1
Notes 2, 4
b
2
Fixed to “0”
b
1
Enables forced release of HALT mode by IRQTM1 when 1
Notes 3, 4
b
0
Enables releasing HALT mode by RLS input when 1
Note 4
Notes 1.
Only reset (RESET input or POC) is valid when HALT 0000B is specified.
IP
×××
must be set to 1.
The HALT mode is released regardless of the status of IPTM1.
Even if the HALT instruction is executed with IRQ
×××
= 1 or RLS input being low, the HALT
instruction is ignored (treated as an NOP instruction), and the HALT mode is not set.
2.
3.
4.
17.2.2 Start address after HALT mode is released
The start address from which the program execution is started after the HALT mode has been released differs
depending on the interrupt enable condition and the condition under which the HALT mode has been released.
Table 17-3. Start Address after HALT Mode Is Released
Releasing Condition
Start Address after Release
Reset
Note 1
Address 0
RLS
Address next to that of HALT instruction
Address next to that of HALT instruction in DI status
IRQ
×××
Note 2
Interrupt vector in EI status
(if two or more IRQ
×××
flags are set, interrupt vector with higher priority)
Notes 1.
RESET input and POC are valid as reset.
IP
×××
must be set to 1 except when the HALT mode is forcibly released by IRQTM1.
2.
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| UPD17149CTA1 | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17147CT | SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17147CT | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17147CTA1 | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17147GT | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17147GTA1 | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
| UPD17149 | 制造商:NEC 制造商全稱:NEC 功能描述:SMALL, GENERAL-PURPOSE 4-BIT SINGLE-CHIP MICROCONTROLLERS |
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