PIC16C662-10I/SP Microchip Technology, PIC16C662-10I/SP Datasheet - Page 22
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PIC16C662-10I/SP
Manufacturer Part Number
PIC16C662-10I/SP
Description
8-Bit EPROM Microcontrollers with Analog Comparators
Manufacturer
Microchip Technology
Datasheet
1.PIC16C662-10ISP.pdf
(136 pages)
- Current page: 22 of 136
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PIC16C64X & PIC16C66X
4.2.2.2
The OPTION register is a readable and writable
register which contains various control bits to configure
the TMR0/WDT prescaler, the external RB0/INT
interrupt, TMR0, and the weak pull-ups on PORTB.
FIGURE 4-6:
DS30559A-page 22
bit7
bit 7:
bit 6:
bit 5:
bit 4:
bit 3:
bit 2-0: PS2:PS0: Prescaler Rate Select bits
R/W-1
RBPU
OPTION REGISTER
RBPU: PORTB Pull-up Enable bit
1 = PORTB pull-ups are disabled
0 = PORTB pull-ups are enabled by individual port latch values
INTEDG: Interrupt Edge Select bit
1 = Interrupt on rising edge of RB0/INT pin
0 = Interrupt on falling edge of RB0/INT pin
T0CS: TMR0 Clock Source Select bit
1 = Transition on RA4/T0CKI pin
0 = Internal instruction cycle clock (CLKOUT)
T0SE: TMR0 Source Edge Select bit
1 = Increment on high-to-low transition on RA4/T0CKI pin
0 = Increment on low-to-high transition on RA4/T0CKI pin
PSA: Prescaler Assignment bit
1 = Prescaler is assigned to the WDT
0 = Prescaler is assigned to the Timer0 module
Bit Value
INTEDG
R/W-1
000
001
010
011
100
101
110
111
OPTION REGISTER (ADDRESS 81h)
TMR0 Rate
R/W-1
T0CS
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
R/W-1
T0SE
WDT Rate
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
R/W-1
PSA
Preliminary
R/W-1
PS2
R/W-1
Note:
PS1
bit0
To achieve a 1:1 prescaler assignment for
TMR0, assign the prescaler to the WDT.
R/W-1
PS0
R= Readable bit
W= Writable bit
U= Unimplemented bit,
read as ‘0’
- n= Value at POR reset
1996 Microchip Technology Inc.
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