参数资料
型号: PIC16LC433E/P
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDIP18
封装: 0.300 INCH, PLASTIC, DIP-18
文件页数: 33/122页
文件大小: 1862K
代理商: PIC16LC433E/P
PIC16C433
DS41139A-page 16
Advance Information
2001 Microchip Technology Inc.
4.2.2.2
OPTION Register
The OPTION Register is a readable and writable regis-
ter, which contains various control bits to configure the
TMR0/WDT prescaler, the External INT Interrupt,
TMR0 and the weak pull-ups on GPIO.
REGISTER 4-2:
OPTION REGISTER (ADDRESS 81h))
Note:
To achieve a 1:1 prescaler assignment for
the TMR0 register, assign the prescaler to
the Watchdog Timer by setting bit PSA
(OPTION<3>).
R/W-1
GPPU
INTEDG
T0CS
T0SE
PSA
PS2
PS1
PS0
bit7
bit0
bit 7
GPPU: Weak Pull-up Enable bit
1
= Weak pull-ups disabled
0
= Weak pull-ups enabled (GP0, GP1, GP3)
bit 6
INTEDG: Interrupt Edge Select bit
1
= Interrupt on rising edge of GP2/T0CKI/AN2/INT pin
0
= Interrupt on falling edge of GP2/T0CKI/AN2/INT pin
bit 5
T0CS: TMR0 Clock Source Select bit
1
= Transition on GP2/T0CKI/AN2/INT 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/AN2/INT pin
0
= Increment on low-to-high transition on GP2/T0CKI/AN2/INT 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
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR reset
’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
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