PIC17LC44-08SLASHP datasheet(231/240 Pages) MICROCHIP

231 / 240 page

DS30412C-page 231

PIC17C4X

WDT ........................................................................... 99, 103

Clearing the WDT .................................................... 103

Normal Timer ........................................................... 103

Period ....................................................................... 103

Programming Considerations .................................. 103

WDTPS0 ............................................................................ 99

WDTPS1 ............................................................................ 99

WREG ................................................................................ 34

XORLW ............................................................................ 141

XORWF ............................................................................ 141

Z ..................................................................................... 9, 36

Zero (Z) ................................................................................ 9

LIST OF EXAMPLES

Example 3-1: Signed Math ..................................................9

Example 3-2: Instruction Pipeline Flow .............................14

Example 5-1: Saving STATUS and WREG in RAM ..........27

Example 6-1: Indirect Addressing......................................40

Example 7-1: Table Write ..................................................46

Example 7-2: Table Read..................................................48

Example 8-1: 8 x 8 Multiply Routine ..................................49

Example 8-2: 8 x 8 Signed Multiply Routine......................49

Example 8-3: 16 x 16 Multiply Routine ..............................50

Example 8-4: 16 x 16 Signed Multiply Routine..................51

Example 9-1: Initializing PORTB .......................................57

Example 9-2: Initializing PORTC .......................................58

Example 9-3: Initializing PORTD .......................................60

Example 9-4: Initializing PORTE .......................................62

Example 9-5: Read Modify Write Instructions on an

I/O Port ........................................................64

Example 11-1: 16-Bit Read .................................................69

Example 11-2: 16-Bit Write..................................................69

Example 12-1: Sequence to Read Capture Registers.........78

Example 12-2: Writing to TMR3 ..........................................80

Example 12-3: Reading from TMR3 ....................................80

Example 13-1: Calculating Baud Rate Error........................86

Example F-1: PIC17C42 to Sleep....................................223

LIST OF FIGURES

Figure 3-1:

PIC17C42 Block Diagram ...........................10

Figure 3-2:

PIC17CR42/42A/43/R43/44 Block

Diagram.......................................................11

Figure 3-3:

Clock/Instruction Cycle................................14

Figure 4-1:

Simplified Block Diagram of On-chip

Reset Circuit................................................15

Figure 4-2:

Time-Out Sequence on Power-Up

(MCLR Tied to VDD) ....................................17

Figure 4-3:

Time-Out Sequence on Power-Up

(MCLR NOT Tied to VDD)............................17

Figure 4-4:

Slow Rise Time (MCLR Tied to VDD) ..........17

Figure 4-5:

Oscillator Start-Up Time ..............................18

Figure 4-6:

Using On-Chip POR ....................................18

Figure 4-7:

Brown-out Protection Circuit 1.....................18

Figure 4-8:

PIC17C42 External Power-On Reset

Circuit (For Slow VDD Power-Up) ................18

Figure 4-9:

Brown-out Protection Circuit 2.....................18

Figure 5-1:

Interrupt Logic .............................................21

Figure 5-2:

INTSTA Register (Address: 07h,

Unbanked)...................................................22

Figure 5-3:

PIE Register (Address: 17h, Bank 1) ..........23

Figure 5-4:

PIR Register (Address: 16h, Bank 1) ..........24

Figure 5-5:

INT Pin / T0CKI Pin Interrupt Timing...........26

Figure 6-1:

Program Memory Map and Stack................29

Figure 6-2:

Memory Map in Different Modes .................30

Figure 6-3:

External Program Memory Access

Waveforms ..................................................31

Figure 6-4:

Typical External Program Memory

Connection Diagram....................................31

Figure 6-5:

PIC17C42 Register File Map.......................33

Figure 6-6:

PIC17CR42/42A/43/R43/44 Register

File Map.......................................................33

Figure 6-7:

ALUSTA Register (Address: 04h,

Unbanked)...................................................36

Figure 6-8:

CPUSTA Register (Address: 06h,

Unbanked)...................................................37

Figure 6-9:

T0STA Register (Address: 05h,

Unbanked)...................................................38

Figure 6-10:

Indirect Addressing......................................39

Figure 6-11:

Program Counter Operation ........................41

PIC17LC44-08/P Datasheet(PDF) 231 Page - Microchip Technology

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