PIC16C72-04ESS View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C72-04ESS

8-Bit CMOS Microcontrollers with A/D Converter

Microchip Technology 

PIC16C7X

TABLE 14-6: STATUS BITS AND THEIR SIGNIFICANCE, PIC16C72/73A/74A/76/77

POR BOR TO PD

0

x

1 1 Power-on Reset

0

x

0 x Illegal, TO is set on POR

0

x

x 0 Illegal, PD is set on POR

1

0

x x Brown-out Reset

1

1

0 1 WDT Reset

1

1

0 0 WDT Wake-up

1

1

u u MCLR Reset during normal operation

1

1

1 0 MCLR Reset during SLEEP or interrupt wake-up from SLEEP

TABLE 14-7: RESET CONDITION FOR SPECIAL REGISTERS

Condition

Program

Counter

STATUS

Register

PCON

Register

PIC16C73/74

Power-on Reset

000h

0001 1xxx ---- --0-

MCLR Reset during normal operation

000h

000u uuuu ---- --u-

MCLR Reset during SLEEP

000h

0001 0uuu ---- --u-

WDT Reset

000h

0000 1uuu ---- --u-

WDT Wake-up

PC + 1

uuu0 0uuu ---- --u-

Brown-out Reset

Interrupt wake-up from SLEEP

000h

PC + 1(1)

0001 1uuu

uuu1 0uuu

N/A

---- --u-

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

Note 1: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded

with the interrupt vector (0004h).

PCON

Register

PIC16C72/73A/74A/76/77

---- --0x

---- --uu

---- --uu

---- --uu

---- --uu

---- --u0

---- --uu

TABLE 14-8: INITIALIZATION CONDITIONS FOR ALL REGISTERS

Register

Applicable Devices

Power-on Reset,

Brown-out Reset

MCLR Resets

WDT Reset

Wake-up via WDT

or

Interrupt

W

72 73 73A 74 74A 76 77 xxxx xxxx

uuuu uuuu

uuuu uuuu

INDF

72 73 73A 74 74A 76 77

N/A

N/A

N/A

TMR0

72 73 73A 74 74A 76 77 xxxx xxxx

uuuu uuuu

uuuu uuuu

PCL

72 73 73A 74 74A 76 77

0000h

0000h

PC + 1(2)

STATUS

72 73 73A 74 74A 76 77

0001 1xxx

000q quuu(3)

uuuq quuu(3)

FSR

72 73 73A 74 74A 76 77 xxxx xxxx

uuuu uuuu

uuuu uuuu

PORTA

72 73 73A 74 74A 76 77 --0x 0000

--0u 0000

--uu uuuu

PORTB

72 73 73A 74 74A 76 77 xxxx xxxx

uuuu uuuu

uuuu uuuu

PORTC

72 73 73A 74 74A 76 77 xxxx xxxx

uuuu uuuu

uuuu uuuu

PORTD

72 73 73A 74 74A 76 77 xxxx xxxx

uuuu uuuu

uuuu uuuu

PORTE

72 73 73A 74 74A 76 77 ---- -xxx

---- -uuu

---- -uuu

PCLATH 72 73 73A 74 74A 76 77 ---0 0000

---0 0000

---u uuuu

Legend: u = unchanged, x = unknown, - = unimplemented bit, read as '0', q = value depends on condition

Note 1: One or more bits in INTCON, PIR1 and/or PIR2 will be affected (to cause wake-up).

2: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector

(0004h).

3: See Table 14-7 for reset value for specific condition.

DS30390E-page 136

© 1997 Microchip Technology Inc.

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