參數(shù)資料
型號(hào)： EM78458
英文描述： Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 16-QFN
中文描述： 8位微控制器的通用產(chǎn)品
文件頁(yè)數(shù)： 17/57頁(yè)
文件大?。?/td> 854K
代理商： EM78458
EM78458/459
MASK ROM
This specification is subject to change without prior notice.
2002/03/01
24
Table 4 Usage of Port 6 Input Changed Wake-up/Interrupt Function
Usage of Port 6 Input Status Changed Wake-up/Interrupt
(I) Wake-up from Port 6 Input Status Change
(II) Port 6 Input Status Change Interrupt
(a) Before SLEEP
1. Read I/O Port 6 (MOV R6,R6)
1. Disable WDT
2. Execute "ENI"
2. Read I/O Port 6 (MOV R6,R6)
3. Enable interrupt (Set IOCF0.1)
3. Execute "ENI" or "DISI"
4. IF Port 6 changed (interrupt)
4. Enable interrupt (Set IOCF0.1)
→ Interrupt vector (008H)
5. Execute "SLEP" instruction
(b) After wake-up
1. IF "ENI"
→ Interrupt vector (008H)
2. IF "DISI"
→ Next instruction
4.5 RESET and Wake-up
1. The function of RESET and Wake-up
A RESET is initiated by one of the following events-
(1) Power-on reset
(2) /RESET pin input "low", or
(3) WDT time-out (if enabled).
The device is kept in a RESET condition for a period of approximately 18ms (one oscillator start-up
timer period) after the reset is detected. Once the RESET occurs, the following functions are
performed.
The oscillator is running, or will be started.
The Program Counter (R2) is set to all "0".
All I/O port pins are configured as input mode (high-impedance state).
The Watchdog Timer and prescaler are cleared.
When power is switched on, the upper 3 bits of R3 are cleared.
The bits of the CONT register are set to all "1" except for the Bit 6 (INT flag).
The bits of the IOCB0 register are set to all "1".
The IOCC0 register is cleared.
The bits of the IOCD0 register are set to all "1".
Bit 7 of the IOCE0 register is set to "1", and Bit 6 is cleared.
Bits 0~6 of RF register and bits 0~6 of IOCF0 register are cleared.
Executing the “SLEP” instruction will assert the sleep (power down) mode. While entering sleep mode,
the WDT (if enabled) is cleared but keeps on running. The controller can be awakened by-
相關(guān)PDF資料
PDF描述
EM78459 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 14-SOIC
EM78450 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0&degC to 70°C; Package: 16-QFN
EM78612 Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 16-QFN
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
EM78458AM 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78458AP 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78459 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78459AK 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
EM78459AM 制造商:EMC 制造商全稱:ELAN Microelectronics Corp 功能描述:8-Bit Microcontroller with MASK ROM
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