MCP19110 Datasheet, PDF (77/226 Pages) Microchip Technology – Digitally Enhanced Power Analog Controller with Integrated Synchronous Driver

MCP19110/11
11.3.0.1 OPTION Register
The OPTION register is a readable and writable
register, which contains various control bits to
configure:
• Timer0/WDT prescaler
• External GPA2/INT interrupt
• Timer0
• Weak pull-ups on PORTGPA and PORTGPB
Note 1: To achieve a 1:1 prescaler assignment
for Timer0, assign the prescaler to the
WDT by setting PSA bit to ‘1’ of the
OPTION register. See Section 23.1.3
“Software Programmable Prescaler”
REGISTER 11-2: OPTION_REG: OPTION REGISTER (Note 1)
R/W-1
RAPU
bit 7
R/W-1
INTEDG
R/W-1
T0CS
R/W-1
T0SE
R/W-1
PSA
R/W-1
PS2
R/W-1
PS1
R/W-1
PS0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
RAPU: Port GPx Pull-up Enable bit
1 = Port GPx pull-ups are disabled
0 = Port GPx pull-ups are enabled
INTEDG: Interrupt Edge Select bit
0 = Interrupt on rising edge of INT pin
1 = Interrupt on falling edge of INT pin
T0CE: TMR0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock
T0SE: TMR0 Source Edge Select bit
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
PSA: Prescaler Assignment bit
1 = Prescaler is assigned to WDT
0 = Prescaler is assigned to the Timer0 module
PS<2:0>: Prescaler Rate Select bits
Bit Value
000
001
010
011
100
101
110
111
TMR0
Rate
1: 2
1: 4
1: 8
1: 16
1: 32
1: 64
1: 128
1: 256
WDT Rate
1: 1
1: 2
1: 4
1: 8
1: 16
1: 32
1: 64
1: 128
Note 1: Individual WPUx bit must also be enabled.
 2013 Microchip Technology Inc.
DS20002331B-page 77