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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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Motor de Búsqueda de Datasheet de Componentes Electrónicos |
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MPXM2102AS Datasheet(PDF) 119 Page - Motorola, Inc |
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MPXM2102AS Datasheet(HTML) 119 Page - Motorola, Inc |
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119 / 670 page  AN1612 2–83 Motorola Sensor Device Data www.motorola.com/semiconductors DONE JMP DONE ; End SILENCE BRSET 7,PORTB,SILENCE ; Sample switch S2 for stopping LED SEI BCLR 3,PORTB ; Turn off LED JMP DONE ; End ****************************************** * * * Timer service interrupt * * Alternates the PLMA data * * and bit 3 of Port B * * * ****************************************** TIMERCMP BSR COMPRGT ; Branch to subroutine compare register BRSET 1,PORTB,SKIPBUZZER ; Branch if J1 is OFF LDA PLMA EOR #$80 ; Alternate the buzzer STA PLMA RTI SKIPBUZZER BRSET 3,PORTB,OFF_LED ; Alternate LED supply BSET 3,PORTB RTI OFF_LED BCLR 3,PORTB RTI ****************************************** * * * Subroutine reset * * the timer compare register * * * ****************************************** COMPRGT LDA TCNTHI ; Read Timer count register STA TEMPTCNTHI ; and store it in the RAM LDA TCNTLO STA TEMPTCNTLO ADD #$50 ; Add C350 H = 50,000 periods STA TEMPTCNTLO ; with the current timer count LDA TEMPTCNTHI ; 1 period = 2 us ADC #$C3 STA TEMPTCNTHI ; Save the next count to the register STA OCMPHI1 LDA TSTATUS ; Clear the output compare flag LDA TEMPTCNTLO ; by access the timer status register STA OCMPLO1 ; and then access the output compare register RTS ****************************************** * * * Delay Subroutine for 0.20 sec * * * * Input: None * * Output: None * * * ****************************************** DLY20 STA STACK+2 STX STACK+3 LDA #!40 ; 1 unit = 0.7725 mS OUTLP CLRX INNRLP DECX BNE INNRLP DECA BNE OUTLP LDX STACK+3 LDA STACK+2 RTS ****************************************** * * * This subroutine provides services * * for those unintended interrupts * * * ****************************************** SWI RTI ; Software interrupt return IRQ RTI ; Hardware interrupt TIMERCAP RTI ; Timer input capture TIMERROV RTI ; Timer overflow interrupt SCI RTI ; Serial communication Interface Interrupt ORG $3FF2 ; For 68HC05B16, the vector location FDB SCI ; starts at 3FF2 FDB TIMERROV ; For 68HC05B5, the address starts at 1FF2 FDB TIMERCMP FDB TIMERCAP FDB IRQ FDB SWI FDB RESET Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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