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AT89LP828-20AU Datasheet(PDF) 3 Page - ATMEL Corporation |
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AT89LP828-20AU Datasheet(HTML) 3 Page - ATMEL Corporation |
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3 / 149 page  3 3654A–MICRO–8/09 AT89LP428/828 1.5 Pin Description Table 1-1. AT89LP428/828 Pin Description Pin Number Symbol Type Description TQFP /MLF PLCC PDIP 15 5 P4.1 I/O O O I/O P4.1: User-configurable I/O Port 4 bit 1. XTAL2: Output from inverting oscillator amplifier. It may be used as a port pin if the internal RC oscillator is selected as the clock source. CLKOUT: When the internal RC oscillator is selected as the clock source, may be used to output the internal clock divided by 2. DDA: Serial Data input/output for On-chip Debug Interface when OCD is enabled and the external clock is selected as the clock source. 26 6 P4.0 I/O I I/O P4.0: User-configurable I/O Port 4 bit 0. XTAL1: Input to the inverting oscillator amplifier and internal clock generation circuits. It may be used as a port pin if the internal RC oscillator is selected as the clock source. DDA: Serial Data input/output for On-chip Debug Interface when OCD is enabled and the internal RC oscillator is selected as the clock source. 3 7 N/A P4.5 I/O P4.5: User-configurable I/O Port 4 bit 5. 48 7 GND I Ground 5 9 N/A P4.4 I/O P4.4: User-configurable I/O Port 4 bit 4. 6108 P3.2 I/O I P3.2: User-configurable I/O Port 3 bit 2. INT0: External Interrupt 0 Input or Timer 0 Gate Input. 7119 P3.3 I/O I P3.3: User-configurable I/O Port 3 bit 3. INT1: External Interrupt 1 Input or Timer 1 Gate Input 812 10 P3.4 I/O I/O P3.4: User-configurable I/O Port 3 bit 4. T1: Timer/Counter 0 External input or PWM output. 913 11 P3.5 I/O I/O P3.5: User-configurable I/O Port 3 bit 5. T1: Timer/Counter 1 External input or PWM output. 10 14 12 P3.6 I/O I I P3.6: User-configurable I/O Port 3 bit 6 (if Reset Fuse is disabled). RST: External Active-low Reset input (if Reset Fuse is enabled, see “External Reset” on page 26). DCL: Serial Clock input for On-chip Debug Interface when OCD is enabled. 11 15 13 P2.3 I/O I/O P2.3: User-configurable I/O Port 2 bit 3. CCD: Timer 2 Channel D Compare Output or Capture Input. 12 16 14 P2.1 I/O I/O P2.2: User-configurable I/O Port 2 bit 2. CCC: Timer 2 Channel C Compare Output or Capture Input. 13 17 15 P2.1 I/O I/O P2.1: User-configurable I/O Port 2 bit 1. CCB: Timer 2 Channel B Compare Output or Capture Input. 14 18 16 P2.0 I/O I/O P2.0: User-configurable I/O Port 2 bit 0. CCA: Timer 2 Channel A Compare Output or Capture Input. 15 19 17 P3.7 I/O I/O P3.7: User-configurable I/O Port 3 bit 7. DDA: Serial Data input/output for On-chip Debug Interface when OCD is enabled and the Crystal oscillator is selected as the clock source. 16 20 18 P1.0 I/O I/O I P1.0: User-configurable I/O Port 1 bit 0. T2: Timer 2 External Input or Clock Output. GPI0: General-purpose Interrupt input 0. |
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