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IC89E64-40W Datasheet(PDF) 11 Page - Integrated Circuit Solution Inc |
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IC89E64-40W Datasheet(HTML) 11 Page - Integrated Circuit Solution Inc |
11 / 36 page IC89E54/58/64 Integrated CircuitSolution Inc. 11 MC012-0C 11/16/2001 The timers/counters Refer to IC80C32 data sheet. The serial interface Refer to IC80C32 data sheet. The interrupt system There are 8 interrupt vectors in 44 pins package and 6 interrupt vectors in 40 pins package. Eight interrupt vectors only exist in IC89E54/58/64 series. INT2 and INT3 are new interrupts that add on standard IC80C32. The interrupt information shows in Table 3. The interrupt architecture shows in figure 10. External interrupt 2 and 3 control register is XICON shown in following. Two additional external interrupts, INT2 and INT3, whose function are similar to those of external interrupt 0 and 1 in the standard 80C32. The functions/status of these interrupts are determined/shown by the bits in the XICON(External Interrupt Control) register. The XICON register is bit-addressable but is not a standard register in the 80C32. Its address is at 0C0H. To set/clear bits in the XICON register, one can use the “SETB (/CLR) bit” instruction. Table 3. Eight interrupt information Interrupt Source Vector Address Polling Sequence Enable Required Interrupt Type within priority leve Settings Edge/Level External Interrupt 0 03H 0 (Highest) IE.0 TCON.0 Timer/Counter 0 0BH 1 IE.1 - External Interrupt 1 13H 2 IE.2 TCON.2 Timer/Counter 1 1BH 3 IE.3 - Serial Port 23H 4 IE.4 - Timer/Counter 2 2BH 5 IE.5 - External Interrupt 2 (1) 33H 6 XICON.2 XICON.0 External Interrupt 3 (1) 3BH 7 (Lowest) XICON.6 XICON.3 Note: 1. Interrupt 2 and interrupt 3 exist in IC89E54/58/64 44 pins package. |
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