Pin | Name | Input | Output | Description |
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1 | RA2 | TTL | TTL | Bi-directional I/O Port A |
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2 | RA3 | TTL | TTL | Bi-directional I/O Port A |
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3 | RA4 | TTL | TTL | Bi-directional I/O Port A |
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T0CKI | ST | OD | clock input to the TMR0 timer/counter. |
4 | MCLR | ST | - | Master Clear |
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Vpp | Power | - | Programming volage input. |
5 | Vss | Power | - | Ground reference |
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6 | RB0 | TTL | TTL | Bi-directional I/O Port |
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INT | ST | - | External Interupt |
7 | RB1 | TTL | TTL | Bi-directional I/O Port B |
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8 | RB2 | TTL | TTL | Bi-directional I/O Port B |
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9 | RB3 | TTL | TTL | Bi-directional I/O Port B |
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10 | RB4 | TTL | TTL | Bi-directional I/O Port B, interupt-on-change pin. |
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11 | RB5 | TTL | TTL | Bi-directional I/O Port B, interupt-on-change pin. |
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12 | RB6 | TTL | TTL | Bi-directional I/O Port B, interupt-on-change pin. |
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13 | RB7 | TTL | TTL | Bi-directional I/O Port B, interupt-on-change pin. |
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14 | Vdd | Power | - | Positive Supply |
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15 | OSC1 | CMOS | - | Oscillator Crystal Input |
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CLKIN | ST | - | External clock source input. |
16 | OSC2 | - | OSC | Oscillator crystal output. |
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CLKOUT | - | - | instruction cycle rate output. |
17 | RA0 | TTL | TTL | Bi-directional I/O Port A |
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18 | RA1 | TTL | TTL | Bi-directional I/O Port A |
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