PIC16C505-20/JW データシートの表示（PDF） - Microchip Technology

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PIC16C505-20/JW

14-Pin, 8-Bit CMOS Microcontroller

Microchip Technology 

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 Function 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

All Other

Resets(2)

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

03h

STATUS

RBWUF

—

PAO

TO

PD

04h

FSR

Indirect data memory address pointer

1111 1111 1111 1111

Z

DC

C

0001 1xxx q00q quuu(1)

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 --11 1111

N/A

TRISC

—

— I/O control registers

--11 1111 --11 1111

N/A

OPTION

RBWU RBPU TOCS TOSE

PSA

PS2 PS1 PS0 1111 1111 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 cells not used by Port Registers, read as ‘0’, — = unimplemented, read as ‘0’, x = unknown, u = unchanged,

q = depends on condition.

Note 1: If reset was due to wake-up on pin change, then bit 7 = 1. All other rests will cause bit 7 = 0.

Note 2: Other (non-power-up) resets include external reset through MCLR, watchdog timer and wake-up on pin change reset.

© 1999 Microchip Technology Inc.

DS40192C-page 13

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