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Fabricar: Philips Tamaño del archivo: 671.08 kb Nombre del archivo: user_manual_p89lpc901_902_903.pdf Idioma del manual:

General Description................................................................................ 7 Pin Configurations ..................................................................................... 7 Product comparison................................................................................... 8 Pin Descriptions - P89LPC901 ................................................................ 12 Pin Descriptions - P89LPC902 ................................................................ 14 Pin Descriptions - P89LPC903 ................................................................ 15 Special Function Registers ...................................................................... 16 Special Function Registers Table - P89LPC901 ..................................... 16 Special Function Registers Table - P89LPC902 ..................................... 19 Special Function Registers Table - P89LPC903 ..................................... 22 Memory Organization .............................................................................. 25 2. Clocks................................................................................................... 27 Enhanced CPU........................................................................................ 27 Clock Definitions...................................................................................... 27 CPU Clock (OSCCLK)............................................................................. 27 Low Speed Oscillator Option - P89LPC901............................................. 27 Medium Speed Oscillator Option - P89LPC901 ...................................... 27 High Speed Oscillator Option - P89LPC901............................................ 27 Oscillator Option Selection- P89LPC901................................................. 28 Clock Output - P89LPC901 ..................................................................... 28 On-Chip RC oscillator Option .................................................................. 28 Watchdog Oscillator Option..................................................................... 29 External Clock Input Option - P89LPC901 .............................................. 29 CPU Clock (CCLK) Wakeup Delay.......................................................... 32 CPU Clock (CCLK) Modification: DIVM Register..................................... 32 Low Power Select (P89LPC901) ............................................................ 33 3. Interrupts .............................................................................................. 35 Interrupt Priority Structure........................................................................ 35 External Interrupt Inputs .......................................................................... 37 External Interrupt Pin Glitch Suppression................................................ 37 4. I/O Ports ............................................................................................... 39 Port Configurations.................................................................................. 39 Quasi-Bidirectional Output Configuration ................................................ 39 Open Drain Output Configuration ............................................................ 40 Input-Only Configuration.......................................................................... 41 Push-Pull Output Configuration ............................................................... 41 Port 0 Analog Functions .......................................................................... 41 Additional Port Features .......................................................................... 42 5. Timers 0 and 1...................................................................................... 45 Mode 0..................................................................................................... 46 Mode 2..................................................................................................... 46 Mode 3..................................................................................................... 47 2003 Dec 8 2 Philips Semiconductors User’s Manual - Preliminary Table of Contents P89LPC901/902/903 Mode 6 - P89LPC901 .............................................................................. 47 Timer Overflow toggle output - P89LPC901............................................ 49 6. Real-Time Clock/System Timer............................................................ 51 Real-time Clock Source........................................................................... 51 Changing RTCS1-0 ................................................................................. 53 Real-time Clock Interrupt/Wake Up ......................................................... 53 Reset Sources Affecting the Real-time Clock.......................................... 53 7. Power Monitoring Functions ............................................

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