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89C52 датащи(PDF) 18 Page - NXP Semiconductors |
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89C52 датащи(HTML) 18 Page - NXP Semiconductors |
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18 / 32 page ![]() Philips Semiconductors Product specification 89C51/89C52/89C54/89C58 80C51 8-bit microcontroller family 4K/8K/16K/32K Flash 1999 Oct 27 18 PX0 IP (0B8H) Priority Bit = 1 assigns higher priority Priority Bit = 0 assigns lower priority BIT SYMBOL FUNCTION IP.7 — Not implemented, reserved for future use. IP.6 — Not implemented, reserved for future use. IP.5 PT2 Timer 2 interrupt priority bit. IP.4 PS Serial Port interrupt priority bit. IP.3 PT1 Timer 1 interrupt priority bit. IP.2 PX1 External interrupt 1 priority bit. IP.1 PT0 Timer 0 interrupt priority bit. IP.0 PX0 External interrupt 0 priority bit. SU00572 PT0 PX1 PT1 PS PT2 — — 0 1 2 3 4 5 6 7 Figure 11. IP Registers PX0H IPH (B7H) Priority Bit = 1 assigns higher priority Priority Bit = 0 assigns lower priority BIT SYMBOL FUNCTION IPH.7 — Not implemented, reserved for future use. IPH.6 — Not implemented, reserved for future use. IPH.5 PT2H Timer 2 interrupt priority bit high. IPH.4 PSH Serial Port interrupt priority bit high. IPH.3 PT1H Timer 1 interrupt priority bit high. IPH.2 PX1H External interrupt 1 priority bit high. IPH.1 PT0H Timer 0 interrupt priority bit high. IPH.0 PX0H External interrupt 0 priority bit high. SU01058 PT0H PX1H PT1H PSH PT2H — — 0 1 2 3 4 5 6 7 Figure 12. IPH Registers |
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