PIC16HV540

DS40197A-page 6

Preliminary

© 1998 Microchip Technology Inc.

4.0

MEMORY ORGANIZATION

FIGURE 4-1:

PIC16HV540 PROGRAM

MEMORY MAP AND STACK

PC<8:0>

Stack Level 1

Stack Level 2

CALL, RETLW

9

000h

1FFh

Reset Vector

0FFh

100h

On-chip

Program

Memory

Stack Level 3

Stack Level 4

FIGURE 4-2:

PIC16HV540 REGISTER FILE

MAP

File Address

00h

01h

02h

03h

04h

05h

06h

07h

1Fh

TMR0

PCL

STATUS

FSR

PORTA

PORTB

General

Purpose

Registers

Note

1:

Not a physical register.

0Fh

10h

08h

TRISA

TRISB

OPTION2

TABLE 4-1:

SPECIAL FUNCTION REGISTER SUMMARY

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

Power-On

Reset

Value on

MCLR and

WDT Reset

N/A

TRIS

I/O control registers (TRISA, TRISB)

1111 1111

1111 1111

N/A

OPTION

Contains control bits to configure Timer0 and Timer0/WDT prescaler

--11 1111

--11 1111

N/A

OPTION2

Contains control bits to configure pin changes, software enabled WDT,

xx11

1111

xx11 1111

regulation and brown-out

00h

INDF

Uses contents of FSR to address data memory (not a physical register)

xxxx xxxx

uuuu uuuu

01h

TMR0

8-bit real-time clock/counter

xxxx xxxx

uuuu uuuu

PCL

Low order 8 bits of PC

1111 1111

1111 1111

03h

STATUS

PCF

PA1

PA0

TO

PD

ZDC

C

1001 1xxx

100q quuu

04h

FSR

Indirect data memory address pointer

1xxx xxxx

1uuu uuuu

05h

PORTA

————

RA3

RA2

RA1

RA0

---- xxxx

---- uuuu

06h

PORTB

RB7

RB6

RB5

RB4

RB3

RB2

RB1

RB0

xxxx xxxx

uuuu uuuu

Legend: Shaded boxes = unimplemented or unused, – = unimplemented, read as '0' (if applicable)

x

= unknown, u = unchanged, q = value depends on condition.

Note 1:

The upper byte of the Program Counter is not directly accessible. See Section 4.5 of the PIC16C5X data sheet (DS30453)

for an explanation of how to access these bits.

2:

File address 07h is a general purpose register on the PIC16HV540.

3: PCF This bit is set to 1 after power up-reset (POR) or sleep command.

4: PCF This bit is set to 0 after a wake up on pin change event.