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PIC16C77X Datasheet(PDF) 8 Page - Microchip Technology |
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PIC16C77X Datasheet(HTML) 8 Page - Microchip Technology |
8 / 200 page PIC16C77X DS30275A-page 8 Advance Information © 1999 Microchip Technology Inc. TABLE 1-2 PIC16C774 PINOUT DESCRIPTION Pin Name DIP Pin# PLCC Pin# QFP Pin# I/O/P Type Buffer Type Description OSC1/CLKIN 13 14 30 I ST/CMOS(4) Oscillator crystal input/external clock source input. OSC2/CLKOUT 14 15 31 O — Oscillator crystal output. Connects to crystal or resonator in crystal oscillator mode. In RC mode, OSC2 pin outputs CLKOUT which has 1/4 the frequency of OSC1, and denotes the instruction cycle rate. MCLR/VPP 1 2 18 I/P ST Master clear (reset) input or programming voltage input. This pin is an active low reset to the device. PORTA is a bi-directional I/O port. RA0/AN0 2 3 19 I/O TTL RA0 can also be analog input0 RA1/AN1 3 4 20 I/O TTL RA1 can also be analog input1 RA2/AN2/VREF-/VRL 4 5 21 I/O TTL RA2 can also be analog input2 or negative analog reference voltage input or internal voltage reference low RA3/AN3/VREF+/VRH 5 6 22 I/O TTL RA3 can also be analog input3 or positive analog reference voltage input or internal voltage reference high RA4/T0CKI 6 7 23 I/O ST RA4 can also be the clock input to the Timer0 timer/ counter. Output is open drain type. RA5/AN4 7 8 24 I/O TTL RA5 can also be analog input4 PORTB is a bi-directional I/O port. PORTB can be soft- ware programmed for internal weak pull-up on all inputs. RB0/INT 33 36 8 I/O TTL/ST(1) RB0 can also be the external interrupt pin. RB1/SS 34 37 9 I/O TTL/ST(1) RB1 can also be the SSP slave select RB2/AN8 35 38 10 I/O TTL RB2 can also be analog input8 RB3/AN9/LVDIN 36 39 11 I/O TTL RB3 can also be analog input9 or input reference for low voltage detect RB4 37 41 14 I/O TTL Interrupt on change pin. RB5 38 42 15 I/O TTL Interrupt on change pin. RB6 39 43 16 I/O TTL/ST(2) Interrupt on change pin. Serial programming clock. RB7 40 44 17 I/O TTL/ST(2) Interrupt on change pin. Serial programming data. Legend: I = input O = output I/O = input/output P = power — = Not used TTL = TTL input ST = Schmitt Trigger input Note 1: This buffer is a Schmitt Trigger input when configured for the multiplexed function. 2: This buffer is a Schmitt Trigger input when used in serial programming mode. 3: This buffer is a Schmitt Trigger input when configured as general purpose I/O and a TTL input when used in the Parallel Slave Port mode (for interfacing to a microprocessor bus). 4: This buffer is a Schmitt Trigger input when configured in RC oscillator mode and a CMOS input otherwise. |
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