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* Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler | * Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler | ||
* Two Capture, Compare, PWM Modules | * Two Capture, Compare, PWM Modules | ||
| − | + | ** Capture is 16-bit, max. resolution is 12.5 nS | |
| − | + | ** Compare is 16-bit, max. resolution is 200 nS | |
| − | + | ** PWM max resolution is 10-bit | |
* 10-bit multi-channel Analog-to-Digital converter | * 10-bit multi-channel Analog-to-Digital converter | ||
* Synchronous Serial Port (SSP) with SPI tm (Master mode) and I2Ctm (Master/Slave) | * Synchronous Serial Port (SSP) with SPI tm (Master mode) and I2Ctm (Master/Slave) | ||
Version vom 9. Dezember 2005, 15:53 Uhr
Inhaltsverzeichnis
PIC16F87x Einführung
Der bekannteste und noch immer weit verbreitete PIC ist immer noch der PIC16F84. Es gibt, besonders im englischsprachigen Raum, zahllose Anwendungs-Beispiele in vielen Foren und Homepages. Hier soll eine Gruppe der Nachfolge-Modelle vorgestellt werden, der PIC15F873, PIC15F876, PIC15F874 und PIC15F877 Sie sind in den üblichen Bauformen PDIP, SOIC, PLCC und QFP im Handel.
Peripheral Features
- Timer0: 8-bit timer/counter with 8-bit prescaler
- Timer1: 16-bit timer/counter with prescaler, can be incremented during SLEEP vie external crystal/clock
- Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler
- Two Capture, Compare, PWM Modules
- Capture is 16-bit, max. resolution is 12.5 nS
- Compare is 16-bit, max. resolution is 200 nS
- PWM max resolution is 10-bit
- 10-bit multi-channel Analog-to-Digital converter
- Synchronous Serial Port (SSP) with SPI tm (Master mode) and I2Ctm (Master/Slave)
- Universale Synchronous Asynchronous Receiver Transmitter (USART/SCI) with 9-bit address detection
- Parallel Slave Port (PSP) 8 -bits wide, with external /RD, /WR and /CS controls (40/44-pin only)
- Brown-out detection circuitry for Brown-out Reset (BOR)
PC16F876
Pinout PC16F877
| OSC1/CLKIN | Quartz Input oder Input für externe Clock-Source. |
| OSC2/CLKOUT | Quartz Output. Im RC-Mode kann hier 1/4 Frequenz von OSC1 entnommen werden. |
| /MCLR /Vpp | Reset oder Programmierspannung (+12 V oder +5V). |
| RA0 / AN0 | PORTA Bit 0 (TTL) oder Analog Input 0. |
| RA1 / AN1 | PORTA Bit 1 (TTL) oder Analog Input 1. |
| RA2 / AN2 / Vref- | PORTA Bit 2 (TTL), Analog Input 2 oder Referenzspannung - |
| RA3 / AN3 / Vref+ | PORTA Bit 3 (TTL), Analog Input 3 oder Referenzspannung + |
| RA4 / T0CKI / Vref- | PORTA Bit 4 (TTL mit ST), oder Clock-In für Timer0 timer/counter. Wenn Output, dann Open drain |
| RA5 / /SS / AN4 | PORTA Bit 5 (TTL), Analog Input 4 oder Slave Select für SSP |
| RB0 / INT | PORTB Bit 0 (TTL) mit Schmitt-Trigger, wenn INT |
| RB1 | PORTB Bit 1 (TTL) |
| RB2 | PORTB Bit 2 (TTL) |
| RB3 / PGM | PORTB Bit 3 (TTL) Bei Low-Voltage-Programming ist dieser Pin besetzt |
| RB4 | PORTB Bit 4 (TTL) Interrupt-on-change möglich |
| RB5 | PORTB Bit 5 (TTL) Interrupt-on-change möglich |
| RB6 / PGC | PORTB Bit 6 (TTL) Interrupt-on-change möglich. CLOCK beim Programmieren u. Debug |
| RB7 / PGD | PORTB Bit 7 (TTL) Interrupt-on-change möglich. DATA beim Programmieren u. Debug |
| RC0 / T1OSO/ T1CKI | PORTC Bit 0 (TTL/ST) Timer1 oscillator output oder clock input |
| RC1 / T1OSI/ CCP2 | PORTC Bit 1 (TTL/ST) Timer1 oscillator input oder CAP2 input od. COMP2/PWM2 output |
| RC2 / CCP1 | PORTC Bit 2 (TTL/ST) CAP1 input od. COMP1/PWM1 output |
| RC3 / SCK / SCL | PORTC Bit 3 (TTL/ST) Clock in / Out für SSP oder I2C |
| RC4 / SDI / SDA | PORTC Bit 4 (TTL/ST) Data in (SSP) oder DATA für I2C |
| RC5 / SDO | PORTC Bit 5 (TTL/ST) Data out (SSP) |
| RC6 / TX / CK | PORTC Bit 6 (TTL/ST) USART-Async TX oder USART-Sync Clock |
| RC7 / RX / DT | PORTC Bit 7 (TTL/ST) USART-Async RX oder USART-Sync Data |
| RD0 / PSP0 | PORTD Bit 0 (TTL/ST) Parallel Slave Port |
| RD1 / PSP1 | PORTD Bit 1 (TTL/ST) Parallel Slave Port |
| RD2 / PSP2 | PORTD Bit 2 (TTL/ST) Parallel Slave Port |
| RD3 / PSP3 | PORTD Bit 3 (TTL/ST) Parallel Slave Port |
| RD4 / PSP4 | PORTD Bit 4 (TTL/ST) Parallel Slave Port |
| RD5 / PSP5 | PORTD Bit 5 (TTL/ST) Parallel Slave Port |
| RD6 / PSP6 | PORTD Bit 6 (TTL/ST) Parallel Slave Port |
| RD7 / PSP7 | PORTD Bit 7 (TTL/ST) Parallel Slave Port |
| RE0 / /RD / AN5 | PORTE Bit 0 (TTL/ST) Parallel Slave Port READ oder analog 5 |
| RE1 / /WR / AN6 | PORTE Bit 1 (TTL/ST) Parallel Slave Port WRITE oder analog 6 |
| RE2 / /CS / AN7 | PORTE Bit 2 (TTL/ST) Parallel Slave Port SELECT oder analog 7 |
Autor: PicNick
