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(shù)增強(qiáng)FLASH微控制器)
中文描述： 18/20-Pin增強(qiáng)型閃存微控制器采用納瓦技術(shù)（18/20引腳，納瓦技術(shù)增強(qiáng)閃存微控制器）
文件頁數(shù)： 38/164頁
文件大?。?/td> 3045K
代理商： PIC16F818
PIC16F818/819
DS39598C-page 36
Preliminary
2002 Microchip Technology Inc.
4.5.1
INTRC MODES
Using the internal oscillator as the clock source can
eliminate the need for up to two external oscillator pins,
which can then be used for digital I/O. Two distinct
configurations are available:
In INTIO1 mode, the OSC2 pin outputs F
OSC
/4,
while OSC1 functions as RA7 for digital input and
output.
In INTIO2 mode, OSC1 functions as RA7 and
OSC2 functions as RA6, both for digital input and
output.
4.5.2
OSCTUNE REGISTER
The internal oscillator’s output has been calibrated at
the factory, but can be adjusted in the user's applica-
tion. This is done by writing to the OSCTUNE register
(Register 4-1). The tuning sensitivity is constant
throughout the tuning range. See Section 15.0
(“Electrical Characteristics”) for further details.
When the OSCTUNE register is modified, the INTOSC
frequency will begin shifting to the new frequency. The
INTOSC clock will reach the new frequency within
8 clock cycles (approximately 8 * 32
μ
s = 256
μ
s).
Code execution continues during this shift; there is no
indication that the shift has occurred. Operation of fea-
tures that depend on the 31.25 kHz INTRC clock
source frequency, such as the WDT and peripherals,
will also be affected by the change in frequency.
REGISTER 4-1:
OSCTUNE: OSCILLATOR TUNING REGISTER
U-0
U-0
R/W-0
—
—
TUN5
bit 7
R/W-0
TUN4
R/W-0
TUN3
R/W-0
TUN2
R/W-0
TUN1
R/W-0
TUN0
bit 0
bit 7-6
bit 5-0
Unimplemented:
Read as ‘0’
TUN<5:0>:
Frequency Tuning bits
011111
= Maximum frequency
011110
=
000001
=
000000
= Center frequency. Oscillator Module is running at the calibrated frequency.
111111
=
100000
= Minimum frequency
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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PIC16F818-E/ML 功能描述:8位微控制器 -MCU 1.75KB 128RAM 16 I/O Ext Temp QFN28 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16F818-E/P 功能描述:8位微控制器 -MCU 1.75KB 128RAM 16 I/O Ext Temp PDIP18 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16F818-E/SO 功能描述:8位微控制器 -MCU 1.75KB 128RAM 16 I/O Ext Temp SOIC18 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16F818-E/SS 功能描述:8位微控制器 -MCU 1.75KB 128RAM 16 I/O Ext Temp SSOP20 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16F818-E/SS 制造商:Microchip Technology Inc 功能描述:IC 8BIT MCU PIC16F 20MHz SSOP-20 制造商:Microchip Technology Inc 功能描述:IC, 8BIT MCU, PIC16F, 20MHz, SSOP-20
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