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PIC12F683 Datasheet(PDF) 14 Page - Microchip Technology |
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PIC12F683 Datasheet(HTML) 14 Page - Microchip Technology |
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14 / 148 page  PIC12F683 DS41211B-page 12 Preliminary 2004 Microchip Technology Inc. 2.2.2.2 Option Register The Option register is a readable and writable register, which contains various control bits to configure: • TMR0/WDT prescaler • External GP2/INT interrupt •TMR0 • Weak pull-ups on GPIO REGISTER 2-2: OPTION_REG – OPTION REGISTER (ADDRESS: 81h) Note: To achieve a 1:1 prescaler assignment for TMR0, assign the prescaler to the WDT by setting PSA bit to ‘1’ (Option<3>). See Section 5.4 “Prescaler”. R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 R/W-1 GPPU INTEDG T0CS T0SE PSA PS2 PS1 PS0 bit 7 bit 0 bit 7 GPPU: GPIO Pull-up Enable bit 1 = GPIO pull-ups are disabled 0 = GPIO pull-ups are enabled by individual port latch values in WPU register bit 6 INTEDG: Interrupt Edge Select bit 1 = Interrupt on rising edge of GP2/INT pin 0 = Interrupt on falling edge of GP2/INT pin bit 5 T0CS: TMR0 Clock Source Select bit 1 = Transition on GP2/T0CKI pin 0 = Internal instruction cycle clock (CLKOUT) bit 4 T0SE: TMR0 Source Edge Select bit 1 = Increment on high-to-low transition on GP2/T0CKI pin 0 = Increment on low-to-high transition on GP2/T0CKI pin bit 3 PSA: Prescaler Assignment bit 1 = Prescaler is assigned to the WDT 0 = Prescaler is assigned to the Timer0 module bit 2-0 PS<2:0>: Prescaler Rate Select bits Note 1: A dedicated 16-bit WDT postscaler is available for the PIC12F683. See Section 12.6 “Watchdog Timer (WDT)” for more information. Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ - n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown 000 001 010 011 100 101 110 111 1 : 2 1 : 4 1 : 8 1 : 16 1 : 32 1 : 64 1 : 128 1 : 256 1 : 1 1 : 2 1 : 4 1 : 8 1 : 16 1 : 32 1 : 64 1 : 128 Bit Value TMR0 Rate WDT Rate(1) |
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