參數(shù)資料
型號: PIC16F818
廠商: Microchip Technology Inc.
英文描述: 18/20-Pin Enhanced FLASH Microcontrollers with nanoWatt Technology(18/20引腳,納瓦技術增強FLASH微控制器)
中文描述: 18/20-Pin增強型閃存微控制器采用納瓦技術(18/20引腳,納瓦技術增強閃存微控制器)
文件頁數(shù): 40/164頁
文件大小: 3045K
代理商: PIC16F818
PIC16F818/819
DS39598C-page 38
Preliminary
2002 Microchip Technology Inc.
FIGURE 4-6:
PIC16F818/819 CLOCK DIAGRAM
REGISTER 4-2:
OSCCON REGISTER
U-0
R/W-0
IRCF2
bit 7
PIC18F818/819
CONFIG (FOSC2:FOSC0)
OSC1
OSC2
SLEEP
LP, XT, HS, RC, EC
CPU
Peripherals
P
M
M
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz
125 kHz
250 kHz
OSCCON<6:4>
111
110
101
100
011
010
001
000
31.25 kHz
31.25 kHz
Source
Internal
Oscillator
Block
WDT
31.25 kHz
(INTRC)
8 MHz
(INTOSC)
Internal Oscillator
R/W-0
IRCF1
R/W-0
IRCF0
U-0
R-0
IOFS
U-0
U-0
bit 0
bit 7
bit 6-4
Unimplemented:
Read as ‘0’
IRCF2:IRCF0:
Internal Oscillator Frequency Select bits
111
= 8 MHz (8 MHz source drives clock directly)
110
= 4 MHz
101
= 2 MHz
100
= 1 MHz
011
= 500 kHz
010
= 250 kHz
001
= 125 kHz
000
= 31.25 kHz (INTRC source drives clock directly)
Unimplemented:
Read as ‘0’
IOFS:
INTOSC Frequency Stable bit
1
= Frequency is stable
0
= Frequency is not stable
Unimplemented:
Read as ‘0’
bit 3
bit 2
bit 1-0
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
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