PIC16LC554 datasheet(90/96 Pages) MICROCHIP

90 / 96 page

PIC16C55X(A)

DS40143B-page 90

Preliminary

Power-On Reset (POR) ...................................................... 40

Power-up Timer (PWRT)..................................................... 40

Prescaler ............................................................................. 32

PRO MATE

® II Universal Programmer............................... 63

Program Memory Organization ........................................... 13

Quick-Turnaround-Production (QTP) Devices ...................... 7

RC Oscillator ....................................................................... 38

Reset................................................................................... 39

RETFIE Instruction.............................................................. 59

RETLW Instruction .............................................................. 59

RETURN Instruction............................................................ 60

RLF Instruction.................................................................... 60

RRF Instruction ................................................................... 60

SEEVAL

® Evaluation and Programming System............... 65

Serialized Quick-Turnaround-Production (SQTP) Devices ... 7

SLEEP Instruction ............................................................... 60

Software Simulator (MPLAB-SIM)....................................... 65

Special Features of the CPU............................................... 35

Special Function Registers ................................................. 16

Stack ................................................................................... 21

Status Register.................................................................... 17

SUBLW Instruction.............................................................. 61

SUBWF Instruction.............................................................. 61

SWAPF Instruction.............................................................. 62

Timer0

TIMER0 ....................................................................... 29

TIMER0 (TMR0) Interrupt ........................................... 29

TIMER0 (TMR0) Module ............................................. 29

TMR0 with External Clock........................................... 31

Timer1

Switching Prescaler Assignment................................. 33

Timing Diagrams and Specifications................................... 74

TMR0 Interrupt .................................................................... 46

TRIS Instruction .................................................................. 62

TRISA.................................................................................. 23

TRISB.................................................................................. 25

Watchdog Timer (WDT) ...................................................... 47

XORLW Instruction ............................................................. 62

XORWF Instruction ............................................................. 62

LIST OF EXAMPLES

Example 3-1: Instruction Pipeline Flow .................... 12

Example 4-1: Ndirect Addressing............................. 22

Example 5-1: Read-Modify-Write Instructions

on an I/O Port..................................... 27

Example 6-1: Changing Prescaler

(Timer0

→WDT)................................... 33

Example 6-2: Changing prescaler

(WDT

→Timer0)................................... 33

Example 7-1: Saving the Status and W Registers

in RAM ............................................. 47

LIST OF FIGURES

Figure 3-1:

BlocK Diagram ........................................... 10

Figure 3-2:

Clock/Instruction Cycle ............................... 12

Figure 4-1:

Program Memory Map and Stack for the

PIC16C554/PIC6C554(A) .......................... 13

Figure 4-2:

Program Memory Map and Stack for the

PIC16C556(A) ............................................ 13

Figure 4-3:

Program Memory Map and Stack for the

PIC16C558/PIC16C558(A) ........................ 13

Figure 4-4:

Data Memory Map for the

PIC16C554/554(A) ..................................... 15

Figure 4-5:

Data Memory Map for the

PIC16C558/558(A) ..................................... 15

Figure 4-6:

STATUS Register (Address

03h or 83h) ................................................. 17

Figure 4-7:

OPTION Register (address 81h) ................ 18

Figure 4-8:

INTCON Register (address 0Bh

or 8Bh)........................................................ 19

Figure 4-9:

PCON Register (Address 8Eh)................... 20

Figure 4-10:

Loading Of PC In Different Situations ........ 21

Figure 4-11:

Direct/indirect Addressing

PIC16C55X(A)............................................ 22

Figure 5-1:

Block Diagram of

PORT pins RA<3:0>................................... 23

Figure 5-2:

Block Diagram of RA4 Pin .......................... 23

Figure 5-3:

Block Diagram of RB7:RB4 Pins ................ 25

Figure 5-4:

Block Diagram of RB3:RB0 Pins ................ 25

Figure 5-5:

Successive I/O Operation........................... 27

Figure 6-1:

TIMER0 Block Diagram .............................. 29

Figure 6-2:

TIMER0 (TMR0) Timing: Internal

Clock/No PrescaleR ................................... 29

Figure 6-3:

TIMER0 Timing: Internal Clock/

Prescale 1:2 ............................................... 30

Figure 6-4:

TIMER0 Interrupt Timing ............................ 30

Figure 6-5:

TIMER0 Timing With External Clock .......... 31

Figure 6-6:

Block Diagram of thE Timer0/WDT

Prescaler .................................................... 32

Figure 7-1:

Configuration Word .................................... 36

Figure 7-2:

Crystal Operation (or Ceramic Resonator)

(HS, XT or LP Osc Configuration) .............. 37

Figure 7-3:

External Clock Input Operation

(HS, XT or LP Osc Configuration) .............. 37

Figure 7-4:

External Parallel Resonant Crystal

Oscillator Circuit ......................................... 38

Figure 7-5:

External Series Resonant Crystal

Oscillator Circuit ......................................... 38

Figure 7-6:

RC Oscillator Mode .................................... 38

Figure 7-7:

Simplified Block Diagram of On-chip

Reset Circuit ............................................... 39

Figure 7-8:

Time-out Sequence on Power-up

(MCLR not tied to VDD): Case 1 ................. 43

Figure 7-9:

Time-out Sequence on Power-up

(MCLR not tied to VDD): Case 2 ................. 43

Figure 7-10:

Time-out Sequence on Power-up

(MCLR tied to VDD)..................................... 43

Figure 7-11:

External Power-on Reset Circuit

(For Slow VDD Power-up) ........................... 44

Figure 7-12:

Interrupt Logic ............................................ 45

Figure 7-13:

INT Pin Interrupt Timing ............................. 46

Figure 7-14:

Watchdog Timer Block Diagram................. 48

Figure 7-15:

Summary of Watchdog Timer

Registers .................................................... 48

Figure 7-16:

Wake-up from Sleep Through

Interrupt ...................................................... 49

Figure 7-17:

Typical In-Circuit Serial Programming

Connection ................................................. 50

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