MCP1726T-ADJZEMF Microchip Technology, MCP1726T-ADJZEMF Datasheet - Page 14

• Manufacturer Part Number: MCP1726T-ADJZEMF
• Description: Regulator, Extended Industrial, HVSON, 8-Pin|
• Manufacturer: Microchip Technology

PIC12F683
2.2.2.2
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:
DS41211A-page 12
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
OPTION Register
OPTION_REG — OPTION REGISTER (ADDRESS: 81h)
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
INTEDG: Interrupt Edge Select bit
1 = Interrupt on rising edge of GP2/INT pin
0 = Interrupt on falling edge of GP2/INT pin
T0CS: TMR0 Clock Source Select bit
1 = Transition on GP2/T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
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
PSA: Prescaler Assignment bit
1 = Prescaler is assigned to the WDT
0 = Prescaler is assigned to the Timer0 module
PS2:PS0: Prescaler Rate Select bits
Note 1:
Legend:
R = Readable bit
- n = Value at POR
R/W-1
GPPU
Bit Value TMR0 Rate WDT Rate
A dedicated 16-bit WDT postscaler is available for the PIC12F683. See
Section 12.6 “Watchdog Timer (WDT)” for more information.
000
001
010
011
100
101
110
111
INTEDG
R/W-1
Advance Information
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
R/W-1
T0CS
W = Writable bit
‘1’ = Bit is set
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
R/W-1
T0SE
Note:
(1)
R/W-1
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
PSA
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
PS2
 2003 Microchip Technology Inc.
x = Bit is unknown
R/W-1
PS1
R/W-1
PS0
bit 0