PIC16C55X, EPROM-Based 8-Bit CMOS MCU Data Sheet

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PIC16C55X7.1 Configuration BitsThe configuration bits can be programmed (read as '0')or left unprogrammed (read as '1') to select variousdevice configurations. These bits are mapped inprogram memory location 2007h.The user will note that address 2007h is beyondthe user program memory space. In fact, it belongsto the special test/configuration memory space(2000h – 3FFFh), which can be accessed only duringprogramming.FIGURE 7-1:CONFIGURATION WORDCP1 CP0 1 CP1 CP0 1 CP1 CP0 1 — Reserved CP1 CP0 1 PWRTE WDTE F0SC1 F0SC0 CONFIG Addressbit13bit0 REGISTER: 2007hbit 13-8 CP: Code protection bits (1)5-4: 11 = Program Memory code protection off10 = 0400h - 07FFh code protected01 = 0200h - 07FFh code protected11 = 0000h - 07FFh code protectedbit 7: Unimplemented: Read as '1'bit 6: Reserved: Do not usebit 3:bit 2:bit 1-0:PWRTE: Power-up Timer Enable bit1 = PWRT disabled0 = PWRT enabledWDTE: Watchdog Timer Enable bit1 = WDT enabled0 = WDT disabledFOSC1:FOSC0: Oscillator Selection bits11 = RC oscillator10 = HS oscillator01 = XT oscillator00 = LP oscillatorNote 1: All of the CP1:CP0 pairs have to be given the same value to enable the code protection scheme listed.DS40143C-page 36 Preliminary © 1998 Microchip Technology Inc.
PIC16C55X7.2 Oscillator Configurations7.2.1 OSCILLATOR TYPESThe PIC16C55X can be operated in four differentoscillator options. The user can program twoconfiguration bits (FOSC1 and FOSC0) to select one ofthese four modes:• LP Low Power Crystal• XT Crystal/Resonator• HS High Speed Crystal/Resonator• RC Resistor/Capacitor7.2.2 CRYSTAL OSCILLATOR / CERAMICRESONATORSIn XT, LP or HS modes a crystal or ceramic resonatoris connected to the OSC1 and OSC2 pins to establishoscillation (Figure 7-2). The PIC16C55X oscillatordesign requires the use of a parallel cut crystal. Use ofa series cut crystal may give a frequency out of thecrystal manufacturers specifications. When in XT, LP orHS modes, the device can have an external clocksource to drive the OSC1 pin (Figure 7-3).TABLE 7-1:Ranges Characterized:CAPACITOR SELECTIONFOR CERAMIC RESONATORS(PRELIMINARY)Mode Freq OSC1(C1) OSC2(C2)XTHSTABLE 7-2:455 kHz2.0 MHz4.0 MHz8.0 MHz16.0 MHz22 - 100 pF15 - 68 pF15 - 68 pF10 - 68 pF10 - 22 pF22 - 100 pF15 - 68 pF15 - 68 pF10 - 68 pF10 - 22 pFHigher capacitance increases the stability of the oscillatorbut also increases the start-up time. These values are fordesign guidance only. Since each resonator has its owncharacteristics, the user should consult with the resonatormanufacturer for appropriate values of external components.CAPACITOR SELECTIONFOR CRYSTAL OSCILLATOR(PRELIMINARY)Mode Freq OSC1(C1) OSC2(C2)FIGURE 7-2:CRYSTAL OPERATION(OR CERAMIC RESONATOR)(HS, XT OR LP OSCCONFIGURATION)LPXT32 kHz200 kHz100 kHz2 MHz4 MHz68 - 100 pF15 - 30 pF68 - 150 pF15 - 30 pF15 - 30 pF68 - 100 pF15 - 30 pF150 - 200 pF15 - 30 pF15 - 30 pFC1C2See Table 7-1 and Table 7-2 for recommendedvalues of C1 and C2.Note:XTALRSsee NoteOSC1OSC2RFTo internal logicSLEEPPIC16C55XA series resistor may be required forAT strip cut crystals.HS8 MHz10 MHz20 MHz15 - 30 pF15 - 30 pF15 - 30 pF15 - 30 pF15 - 30 pF15 - 30 pFHigher capacitance increases the stability of the oscillatorbut also increases the start-up time. These values are fordesign guidance only. Rs may be required in HS mode aswell as XT mode to avoid overdriving crystals with low drivelevel specification. Since each crystal has its owncharacteristics, the user should consult with the crystalmanufacturer for appropriate values of external components.FIGURE 7-3:EXTERNAL CLOCK INPUTOPERATION (HS, XT OR LPOSC CONFIGURATION)Clock fromext. systemOpenOSC1PIC16C55XOSC2© 1998 Microchip Technology Inc. Preliminary DS40143C-page 37
Page 4 and 5: PIC16C55XNOTES:DS40143C-page 4 Prel
Page 6 and 7: PIC16C55XTABLE 1-1:PIC16C55X FAMILY
Page 8 and 9: PIC16C55XNOTES:DS40143C-page 8 Prel
Page 10: PIC16C55XFIGURE 3-1: BLOCK DIAGRAMD
Page 15: PIC16C55X4.2.2 SPECIAL FUNCTION REG
Page 18 and 19: PIC16C55X4.2.2.3 INTCON REGISTERThe
Page 20 and 21: PIC16C55X4.3 PCL and PCLATHThe prog
Page 22 and 23: PIC16C55XNOTES:DS40143C-page 22 Pre
Page 24 and 25: PIC16C55XTABLE 5-1:PORTA FUNCTIONSN
Page 26 and 27: PIC16C55XFIGURE 5-4:BLOCK DIAGRAM O
Page 30 and 31: PIC16C55XFIGURE 6-3: TIMER0 TIMING:
Page 32 and 33: PIC16C55X6.3 PrescalerAn 8-bit coun
Page 38 and 39: PIC16C55X7.2.3 EXTERNAL CRYSTAL OSC
Page 40 and 41: PIC16C55X7.4 Power-on Reset (POR),
Page 42 and 43: PIC16C55XTABLE 7-5:INITIALIZATION C
Page 44 and 45: PIC16C55XFIGURE 7-11:EXTERNAL POWER
Page 46 and 47: PIC16C55X7.5.1 RB0/INT INTERRUPTAn
Page 48 and 49: PIC16C55XFIGURE 7-14:WATCHDOG TIMER
Page 50 and 51: PIC16C55X7.9 Code ProtectionIf the
Page 52 and 53: PIC16C55XTABLE 8-2:Mnemonic,Operand
Page 54 and 55: PIC16C55XBCFBit Clear fSyntax: [ la
Page 56 and 57: PIC16C55XCLRWDTSyntax:Operands:Oper
Page 58 and 59: PIC16C55XIORWFInclusive OR W with f
Page 60 and 61: PIC16C55XRETURN Return from Subrout
Page 62 and 63: PIC16C55XSWAPFSwap Nibbles in fSynt
Page 64 and 65: PIC16C55X9.6 SIMICE Entry-Level Har
Page 66 and 67: PIC16C55X9.16 KEELOQ ® Evaluation
Page 70 and 71: PIC16C55XTABLE 10-1:CROSS REFERENCE
Page 72 and 73: PIC16C55X10.2 DC CHARACTERISTICS: P
Page 74 and 75: PIC16C55X10.3 DC CHARACTERISTICS: P
Page 76 and 77: PIC16C55X10.5 Timing Diagrams and S
Page 78 and 79: PIC16C55XFIGURE 10-4:RESET, WATCHDO
Page 82 and 83: PIC16C55XPackage Type:K04-010 18-Le
Page 84 and 85: PIC16C55XPackage Type:K04-051 18-Le
Page 86 and 87:
PIC16C55XNOTES:DS40143C-page 86 Pre
Page 88 and 89:
Page 90 and 91:
PIC16C55XPrescaler ................
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PIC16C55XREADER RESPONSEIt is our i
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PIC16C55X, EPROM-Based 8-Bit CMOS MCU Data Sheet

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