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A8351601L-40 Datasheet(PDF) 6 Page - AMIC Technology |
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A8351601L-40 Datasheet(HTML) 6 Page - AMIC Technology |
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6 / 44 page  A8351601 Series (July, 2002, Version 1.0) 5 AMIC Technology, Inc. Pin Description (continued) Pin No. Symbol P-DIP PLCC QFP I/O Description P3.0-P3.7 10-17 11,13-19 5, 7-13 I/O Port 3: Port 3 is an 8-bit bidirectional I/O port with internal pullups. Port 3 pins that have 1s written to them are pulled high by the internal pullups and can be used as inputs. As inputs, Port 3 pins that are externally pulled low will source current because of the internal pullups. (See DC Characteristics: IIL). Port 3 also serves the special features of the A8351601, as listed below: 10 11 5 I RxD (P3.0): Serial input port. 11 13 7 O TxD (P3.1): Serial output port. 12 14 8 I INT0 (P3.2): External interrupt 0. 13 15 9 I INT1 (P3.3): External interrupt 1. 14 16 10 I T0 (P3.4): Timer 0 external input. 15 17 11 I T1 (P3.5): Timer 1 external input. 16 18 12 O WR (P3.6): External data memory write strobe. 17 19 13 O RD (P3.7): External data memory read strobe. PSEN 29 32 26 O Program Store Enable: The read strobe to external program memory. When the device is executing code from the external program memory, PSEN is activated twice each machine cycle except that two PSEN actives are skipped during each access to external data memory. PSEN is not activated during fetches from internal program memory. RST 9 10 4 I Reset: A high on this pin for two machine cycles while the oscillator is running, resets the device. PWM1 1 39 O Pulse width modulation 1 output. PWM2 12 6 O Pulse width modulation 2 output. PWM3 23 17 O (D2, D1, D0) controlled the delay time of PWM3 from 4 CLK to 11 CLK after PWM1 change. PWM4 34 28 O PWM1.7: 1 is PWM3/4096, 75% duty (3072 PWM3 cycle high, 1024 PWM3 cycle low) PWM1.7: 0 is PWM3/1024, 67% duty (2048 PWM3 cycle high, 1024 PWM3 cycle low) XTAL1 19 21 15 I Crystal 1: Input to the inverting oscillator and input to the internal clock generator circuits. XTAL2 18 20 14 O Crystal 2: Output from the inverting oscillator. GND 20 22 16 I Ground: 0V reference. VCC 40 44 38 I Power Supply: This is the power supply voltage for operation. |
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