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EM78P372KSS20 Datasheet(PDF) 59 Page - ELAN Microelectronics Corp |
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EM78P372KSS20 Datasheet(HTML) 59 Page - ELAN Microelectronics Corp |
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59 / 118 page  EM78P372K 8-bit Microcontroller Product Specification (V1.4) 05.11.2016 51 (This specification is subject to change without prior notice) When an interrupt is generated by the Low Voltage Detect (when enabled), the next instruction will be fetched from Address 021H (Low Voltage Detector interrupt). Before an interrupt subroutine is executed, the contents of ACC and the R3 and R4 registers are saved first by the hardware. If another interrupt occurs, the ACC, R3, and R4 will be replaced by the new interrupt. After an interrupt service routine is completed, the ACC, R3, and R4 registers are restored. INT ENI/DISI IOD RFWR IOCFRD IOCFWR IRQn IRQm RFRD IOCF /RESET /IRQn VCC RF CLK CLK Q Q D P R L C _ P R L C Q Q _ D Interrupt sources Interrupt occurs ENI/DISI Stack ACC Stack R3 RETI ACC R3 (7~5, 2~0) R4 (6~0) Stack R4 Figure 7-12 Interrupt Back-up Diagram |
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