PIC16C54-04SLASHSS datasheet(14/84 Pages) MICROCHIP

14 / 84 page

PIC16CR54C

DS40191A-page 14

Preliminary

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

N/A

OPTION

Contains control bits to conﬁgure Timer0 and Timer0/WDT prescaler

--11 1111

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

PA2

PA1

PA0

0001 1xxx

000q 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)

= unknown, u = unchanged, q = see the tables in Section 7.7 for possible values.

Note 1:

The upper byte of the Program Counter is not directly accessible. See Section 4.5

for an explanation of how to access these bits.

PIC16C54-04/SS Datasheet(PDF) 14 Page - Microchip Technology

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