PIC16F720-ISLASHML datasheet(31/244 Pages) MICROCHIP

31 / 244 page

 2010 Microchip Technology Inc.

DS41430A-page 31

PIC16F/LF720/721

3.5

Brown-Out Reset (BOR)

Brown-out Reset is enabled by programming the

BOREN<1:0> bits in the Configuration register.

Between the POR and BOR, complete voltage range

coverage

for

execution

protection

can

implemented.

Two bits are used to enable the BOR. When

BOREN = 11, the BOR is always enabled. When

BOREN = 10, the BOR is enabled, but disabled during

Sleep. When BOREN = 0X, the BOR is disabled.

If VDD falls below VBOR for greater than parameter

(TBOR) (see Section 23.0 “Electrical Specifica-

tions”), the Brown-out situation will reset the device.

This will occur regardless of VDD slew rate. A Reset is

not ensured to occur if VDD falls below VBOR for more

than parameter (TBOR).

If VDD drops below VBOR while the Power-up Timer is

running, the chip will go back into a Brown-out Reset

and the Power-up Timer will be re-initialized. Once VDD

rises above VBOR, the Power-up Timer will execute a

64 ms Reset.

FIGURE 3-3:

BROWN-OUT SITUATIONS

64 ms(1)

VBOR

VDD

Internal

Reset

VBOR

VDD

Internal

Reset

64 ms(1)

< 64 ms

64 ms(1)

VBOR

VDD

Internal

Reset

Note 1:

64 ms delay only if PWRTE bit is programmed to ‘0’.

PIC16F720-I/ML Fiches technique(PDF) 31 Page - Microchip Technology

PIC16F720-I/ML Fiches technique(HTML) 31 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Fiches technique Télécharger

Lien URL