AT91SAM9XE512-QU【PDF 3/159 页】MCU ARM9 512K FLASH 208-PQFP

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PIC16F62X

DS40300C-page 98

Preliminary

2003 Microchip Technology Inc.

TABLE 14-7:

INITIALIZATION CONDITION FOR SPECIAL REGISTERS

TABLE 14-8:

INITIALIZATION CONDITION FOR REGISTERS

Condition

Program

Counter

STATUS

PCON

Power-on Reset

000h

0001 1xxx

---- 1-0x

MCLR Reset during normal operation

000h

000u uuuu

---- 1-uu

MCLR Reset during SLEEP

000h

0001 0uuu

---- 1-uu

WDT Reset

000h

0000 uuuu

---- 1-uu

WDT Wake-up

PC + 1

uuu0 0uuu

---- u-uu

Brown-out Detect Reset

000h

000x xuuu

---- 1-u0

Interrupt Wake-up from SLEEP

PC + 1(1)

uuu1 0uuu

---- u-uu

Legend: u = unchanged, x = unknown, - = unimplemented bit, reads as ‘0’.

Note

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

(0004h) after execution of PC+1.

Address

Power-on

Reset

MCLR Reset during normal

operation

MCLR Reset during SLEEP

WDT Reset

Brown-out Detect Reset (1)

Wake-up from SLEEP through

interrupt

Wake-up from SLEEP through

WDT timeout

W—

xxxx xxxx

uuuu uuuu

INDF

00h

——

—

TMR0

01h

xxxx xxxx

uuuu uuuu

PCL

02h

0000 0000

PC + 1

(3)

STATUS

03h

0001 1xxx

000q quuu

(4)

uuuq quuu

(4)

FSR

04h

xxxx xxxx

uuuu uuuu

PORTA

05h

xxxx 0000

xxxx u000

xxxx 0000

PORTB

06h

xxxx xxxx

uuuu uuuu

T1CON

10h

--00 0000

--uu uuuu

T2CON

12h

-000 0000

-uuu uuuu

CCP1CON

17h

--00 0000

--uu uuuu

RCSTA

18h

0000 -00x

uuuu -uuu

CMCON

1Fh

0000 0000

uu-- uuuu

PCLATH

0Ah

---0 0000

---u uuuu

INTCON

0Bh

0000 000x

0000 000u

uuuu uqqq

(2)

PIR1

0Ch

0000 -000

-q-- ----

(2,5)

OPTION

81h

1111 1111

uuuu uuuu

TRISA

85h

11-1 1111

11-- 1111

uu-u uuuu

TRISB

86h

1111 1111

uuuu uuuu

PIE1

8Ch

0000 -000

uuuu -uuu

PCON

8Eh

---- 1-0x

---- 1-uq

(1,6)

---- --uu

TXSTA

98h

0000 -010

uuuu -uuu

EECON1

9Ch

---- x000

---- q000

---- uuuu

VRCON

9Fh

000- 0000

uuu- uuuu

Legend:

= unchanged, x = unknown, - = unimplemented bit, reads as ‘0’, q = value depends on condition.

Note

1: If VDD goes too low, Power-on Reset will be activated and registers will be affected differently.

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

3: When the wake-up is due to an interrupt and the GIE bit is set, the PC is loaded with the interrupt vector (0004h).

4: See Table 14-7 for RESET value for specific condition.

5: If wake-up was due to comparator input changing, then Bit 6 = 1. All other interrupts generating a wake-up will cause Bit 6 = u.

6: If RESET was due to brown-out, then Bit 0 = 0. All other RESETS will cause Bit 0 = u.

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