Datasheet

 2000 Microchip Technology Inc. Preliminary DS40197B-page 15

PIC16HV540

4.5 OPTION2 Register

The OPTION2 register is a 6-bit wide, write-only regis-

ter which contains various control bits to configure the

added features on the PIC16HV540. A Power-on Reset

sets the OPTION2<5:0> bits.

Example 4-2 illustrates how to initialize the OPTION2

EXAMPLE 4-2: INSTRUCTIONS FOR INITIALIZING OPTION2 REGISTER

movlw ‘0001 0111’b ; load OPTION2 setup value into W

tris 0x07 ; initialize OPTION2 register

Note: All Power-on Resets will disable the

Brown-out Detect circuit. All subsequent

resets will not disable the Brown-out

Detect if enabled.

U-0 U-0 W-1 W-1 W-1 W-1 W-1 W-1

— — PCWU SWDTEN RL SL BODL BODEN W = Writable bit

U = Unimplemented bit

- n = Value at POR reset

bit7 0

bit 7-6: Unimplemented

bit 5: PCWU

: Wake-up on Pin Change

1 = Disabled

0 = Enabled

bit 4: SWDTEN

: Software Controlled WDT Enable bit

1 = WDT is turned off it the WDTEN configuration bit = 0

0 = WDT is on if the WDTEN configuration bit = 0; if WDTEN bit = 1, then SWDTEN is ‘don’t care’

bit 3: RL: Regulated Voltage Level Select bit

1 = 5 volt

0 = 3 volt

bit 2: SL: Sleep Voltage Level Select bit

1 = RL bit setting

0 = 3 volt

bit 1: BODL: Brown-out Voltage Level Select bit

1 = RL bit setting, but SL during SLEEP

0 = 3 volt

bit 0: BODEN

: Brown-out Enabled

1 = Disabled

0 = Enabled