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| 型號(hào)： | HT47C20L |
| 廠商： | Holtek Semiconductor Inc. |
| 元件分類(lèi)： | 數(shù)學(xué)處理器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁(yè)數(shù)： | 14/55頁(yè) |
| 文件大小： | 341K |
| 代理商： | HT47C20L |
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HT47C20L
14
January 18, 2000
Once an interrupt subroutine is serviced, all
other interrupts will be blocked (by clearing the
EMI bit). This scheme may prevent any further
interrupt nesting. Other interrupt requests
may happen during this interval, but only the
interrupt request flag is recorded. If a certain
interrupt needs servicing within the service
routine, the programmer may set the EMI bit
and the corresponding bit of INTC0 or INTC1 al-
low interrupt nesting. If the stack is full, the in-
terrupt request will not be acknowledged, even if
the related interrupt is enabled, until the SP is
decremented. If immediate service is desired, the
stack must be prevented from becoming full.
All these kinds of interrupt have a wake-up ca-
pability. As an interrupt is serviced, a control
transferoccursbypushingtheprogramcounter
onto the stack, followed by a branch to a sub-
routine at specified locations in the program
memory. Only the program counter is pushed
onto the stack. If the contents of the register
and status register (STATUS) is altered by the
interrupt service program which corrupts the
desired control sequence, the contents must be
saved first.
Register
Bit No.
Label
Function
INTC0
(0BH)
0
EMI
Control the master (global) interrupt
(1=enabled; 0=disabled)
1
EEI
Control the external interrupt
(1=enabled; 0=disabled)
2
ETBI
Control the time base interrupt
(1=enabled; 0=disabled)
3
ERTI
Control the real time clock interrupt
(1=enabled; 0=disabled)
4
EIF
External interrupt request flag
(1=active; 0=inactive)
5
TBF
Time base interrupt request flag
(1=active; 0=inactive)
6
RTF
Real time clock interrupt request flag
(1=active; 0=inactive)
7
Unused bit, read as 0
INTC1
(1EH)
0
ETI
Control the timer/event counter interrupt
(1=enabled; 0=disabled)
1
Unused bit, read as 0
2
Unused bit, read as 0
3
Unused bit, read as 0
4
TF
Internal timer/event counter interrupt request flag
(1=active; 0=inactive)
5
Unused bit, read as 0
6
Unused bit, read as 0
7
Unused bit, read as 0
INTC Register
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| HT47C20 | 8-BIT MICROCONTROLLER |
| HT47R20 | 8 位R-F 型OTP 單片機(jī) |
| HT48C05 | Cost-Effective I/O Type 8-Bit MCU |
| HT48C06 | Cost-Effective I/O Type 8-Bit MCU |
| HT48C10-1 | 8-Bit High Performance RISC-like Microcontroller Suitable for Multiple I/O Application(高性能、指令類(lèi)似RISC的8位微控制器，用于多I/O接口設(shè)備) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| HT47C20L_05 | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:R-F Type Low Voltage 8-Bit Mask MCU |
| HT47M50 | 制造商:NTE Electronics 功能描述: |
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| HT47R20 | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:8 位R-F 型OTP 單片機(jī) |
| HT47R20A-1 | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:R-F Type 8-Bit MCU |
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