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MC908QY2CFQE Datasheet(PDF) 74 Page - Freescale Semiconductor, Inc |
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MC908QY2CFQE Datasheet(HTML) 74 Page - Freescale Semiconductor, Inc |
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74 / 168 page  External Interrupt (IRQ) MC68HC908QY/QT Family Data Sheet, Rev. 6 74 Freescale Semiconductor Figure 8-1. Block Diagram Highlighting IRQ Block and Pins When set, the IMASK bit in INTSCR masks the IRQ interrupt request. A latched interrupt request is not presented to the interrupt priority logic unless IMASK is clear. NOTE The interrupt mask (I) in the condition code register (CCR) masks all interrupt requests, including the IRQ interrupt request. A falling edge on the IRQ pin can latch an interrupt request into the IRQ latch. An IRQ vector fetch, software clear, or reset clears the IRQ latch. PTA0/AD0/TCH0/KBI0 PTA1/AD1/TCH1/KBI1 PTA2/IRQ/KBI2/TCLK PTA3/RST/KBI3 PTA4/OSC2/AD2/KBI4 PTA5/OSC1/AD3/KBI5 KEYBOARD INTERRUPT MODULE CLOCK GENERATOR (OSCILLATOR) SYSTEM INTEGRATION MODULE SINGLE INTERRUPT MODULE BREAK MODULE POWER-ON RESET MODULE 16-BIT TIMER MODULE COP MODULE MONITOR ROM PTB0 M68HC08 CPU PTB1 PTB2 PTB3 PTB4 PTB5 PTB6 PTB7 8-BIT ADC 128 BYTES RAM MC68HC908QY4 AND MC68HC908QT4 4096 BYTES MC68HC908QY2, MC68HC908QY1, MC68HC908QT2, AND MC68HC908QT1: 1536 BYTES USER FLASH POWER SUPPLY VDD VSS RST, IRQ: Pins have internal (about 30K Ohms) pull up PTA[0:5]: High current sink and source capability PTA[0:5]: Pins have programmable keyboard interrupt and pull up PTB[0:7]: Not available on 8-pin devices – MC68HC908QT1, MC68HC908QT2, and MC68HC908QT4 (see note in 12.1 Introduction) ADC: Not available on the MC68HC908QY1 and MC68HC908QT1 |
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