PIC16CR58A-20I/JW View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16CR58A-20I/JW

EPROM/ROM-Based 8-Bit CMOS Microcontroller Series

Microchip Technology 

PIC16C5X

TABLE 7-3: RESET CONDITIONS FOR SPECIAL REGISTERS

Condition

PCL

Addr: 02h

Power-On Reset

1111 1111

MCLR reset (normal operation)

MCLR wake-up (from SLEEP)

1111 1111

1111 1111

WDT reset (normal operation)

1111 1111

WDT wake-up (from SLEEP)

1111 1111

Legend: u = unchanged, x = unknown, - = unimplemented read as '0'.

Note 1: TO and PD bits retain their last value until one of the other reset conditions occur.

2: The CLRWDT instruction will set the TO and PD bits.

TABLE 7-4: RESET CONDITIONS FOR ALL REGISTERS

STATUS

Addr: 03h

0001 1xxx

000u uuuu(1)

0001 0uuu

0000 uuuu(2)

0000 0uuu

Register

Address

Power-On Reset

MCLR or WDT Reset

W

N/A

xxxx xxxx

uuuu uuuu

TRIS

N/A

1111 1111

1111 1111

OPTION

N/A

--11 1111

--11 1111

INDF

00h

xxxx xxxx

uuuu uuuu

TMR0

PCL(1)

STATUS(1)

01h

xxxx xxxx

02h

1111 1111

03h

0001 1xxx

uuuu uuuu

1111 1111

000q quuu

FSR

04h

1xxx xxxx

1uuu uuuu

PORTA

05h

---- xxxx

---- uuuu

PORTB

PORTC(2)

06h

xxxx xxxx

07h

xxxx xxxx

uuuu uuuu

uuuu uuuu

General Purpose Register Files

07-7Fh

xxxx xxxx

Legend: u = unchanged, x = unknown, - = unimplemented, read as '0',

q = see tables in Section 7.7 for possible values.

Note 1: See Table 7-3 for reset value for specific conditions.

2: General purpose register file on PIC16C52/C54s/CR54s/C56s/CR56s/C58s/CR58s

uuuu uuuu

FIGURE 7-8: SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT

Power-Up

Detect

VDD

POR (Power-On Reset)

MCLR/VPP pin

WDT

On-Chip

RC OSC

DS30453B-page 36

WDT Time-out

RESET

8-bit Asynch

Ripple Counter

(Start-Up Timer)

Preliminary

S

Q

R

Q

CHIP RESET

© 1998 Microchip Technology Inc.

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