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

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PIC16C55XNOTES:DS40143C-page 34 Preliminary © 1998 Microchip Technology Inc.
PIC16C55X7.0 SPECIAL FEATURES OF THECPUWhat sets a microcontroller apart from otherprocessors are special circuits to deal with the needs ofreal time applications. The PIC16C55X family has ahost of such features intended to maximize systemreliability, minimize cost through elimination of externalcomponents, provide power saving operating modesand offer code protection.These are:1. OSC selection2. ResetPower-on Reset (POR)Power-up Timer (PWRT)Oscillator Start-Up Timer (OST)3. Interrupts4. Watchdog Timer (WDT)5. SLEEP6. Code protection7. ID Locations8. In-circuit serial programmingThe PIC16C55X has a Watchdog Timer which iscontrolled by configuration bits. It runs off its own RCoscillator for added reliability. There are two timers thatoffer necessary delays on power-up. One is theOscillator Start-up Timer (OST), intended to keep thechip in reset until the crystal oscillator is stable. Theother is the Power-up Timer (PWRT), which provides afixed delay of 72 ms (nominal) on power-up only,designed to keep the part in reset while the powersupply stabilizes. With these two functions on-chip,most applications need no external reset circuitry.The SLEEP mode is designed to offer a very lowcurrent power-down mode. The user can wake-up fromSLEEP through external reset, Watchdog Timerwake-up or through an interrupt. Several oscillatoroptions are also made available to allow the part to fitthe application. The RC oscillator option saves systemcost while the LP crystal option saves power. A set ofconfiguration bits are used to select various options.© 1998 Microchip Technology Inc. Preliminary DS40143C-page 35
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 36 and 37: PIC16C55X7.1 Configuration BitsThe
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 ................
Page 92 and 93:
PIC16C55XREADER RESPONSEIt is our i
Page 94 and 95:
Page 96:
WORLDWIDE SALES AND SERVICEAMERICAS
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PIC16C55X, EPROM-Based 8-Bit CMOS MCU Data Sheet

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