PIC16LC505-20SLASHP datasheet(13/80 Pages) MICROCHIP

13 / 80 page

Preliminary

DS40192A-page 13

PIC16C505

4.2.2

SPECIAL FUNCTION REGISTERS

The Special Function Registers (SFRs) are registers

used by the CPU and peripheral functions to control

the operation of the device (Table 4-1).

The special registers can be classiﬁed into two sets.

The special function registers associated with the

“core” functions are described in this section. Those

related to the operation of the peripheral features are

described in the section for each peripheral feature.

TABLE 4-1:

SPECIAL FUNCTION REGISTER (SFR) 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

Value on

Wake-up on

Pin Change

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

02h(1)

PCL

Low order 8 bits of PC

1111 1111

03h

STATUS

RBWUF

—

PAO

0001 1xxx

000q quuu

100q quuu

04h

FSR

Indirect data memory address pointer

110x xxxx

11uu uuuu

05h

OSCCAL

CAL5

CAL4

CAL3

CAL2

CAL1

CAL0

—

1000 00--

uuuu uu--

N/A

TRISB

—

I/O control registers

--11 1111

N/A

TRISC

—

I/O control registers

--11 1111

N/A

OPTION

RBWU

RBPU

TOCS

TOSE

PSA

PS2

PS1

PS0

1111 1111

06h

PORTB

—

RB5

RB4

RB3

RB2

RB1

RB0

--xx xxxx

--uu uuuu

07h

PORTC

—

RC5

RC4

RC3

RC2

RC1

RC0

--xx xxxx

--uu uuuu

Legend: Shaded cellls not used by Port Registers, read as ‘0’, — = unimplemented, read as ‘0’, x = unknown, u = unchanged.

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