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PIC12C508A Datasheet(PDF) 11 Page - Microchip Technology |
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PIC12C508A Datasheet(HTML) 11 Page - Microchip Technology |
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11 / 113 page  © 1999 Microchip Technology Inc. DS40139E-page 11 PIC12C5XX TABLE 3-1: PIC12C5XX PINOUT DESCRIPTION Name DIP Pin # SOIC Pin # I/O/P Type Buffer Type Description GP0 7 7 I/O TTL/ST Bi-directional I/O port/ serial programming data. Can be software programmed for internal weak pull-up and wake-up from SLEEP on pin change. This buffer is a Schmitt Trigger input when used in serial programming mode. GP1 6 6 I/O TTL/ST Bi-directional I/O port/ serial programming clock. Can be software programmed for internal weak pull-up and wake-up from SLEEP on pin change. This buffer is a Schmitt Trigger input when used in serial programming mode. GP2/T0CKI 5 5 I/O ST Bi-directional I/O port. Can be configured as T0CKI. GP3/MCLR/VPP 4 4 I TTL/ST Input port/master clear (reset) input/programming volt- age input. When configured as MCLR, this pin is an active low reset to the device. Voltage on MCLR/VPP must not exceed VDD during normal device operation or the device will enter programming mode. Can be software programmed for internal weak pull-up and wake-up from SLEEP on pin change. Weak pull-up always on if configured as MCLR. ST when in MCLR mode. GP4/OSC2 3 3 I/O TTL Bi-directional I/O port/oscillator crystal output. Con- nections to crystal or resonator in crystal oscillator mode (XT and LP modes only, GPIO in other modes). GP5/OSC1/CLKIN 2 2 I/O TTL/ST Bidirectional IO port/oscillator crystal input/external clock source input (GPIO in Internal RC mode only, OSC1 in all other oscillator modes). TTL input when GPIO, ST input in external RC oscillator mode. VDD 11 P — Positive supply for logic and I/O pins VSS 8 8 P — Ground reference for logic and I/O pins Legend: I = input, O = output, I/O = input/output, P = power, — = not used, TTL = TTL input, ST = Schmitt Trigger input |
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