參數(shù)資料
型號： MCV14AT-I/SL
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDSO14
封裝： 3.90 MM, PLASTIC, SOIC-14
文件頁數(shù)： 33/82頁
文件大小： 1053K
代理商： MCV14AT-I/SL
2009 Microchip Technology Inc.
Preliminary
DS41338C-page 39
MCV14A
Also, see the Electrical Specifications section for
variation of oscillator frequency due to VDD for given
REXT/CEXT values, as well as frequency variation due
to operating temperature for given R, C and VDD
values.
FIGURE 7-5:
EXTERNAL RC
OSCILLATOR MODE
7.2.5
INTERNAL 4/8 MHz RC
OSCILLATOR
The internal RC oscillator provides a fixed 4/8 MHz
(nominal) system clock at VDD = 5V and 25°C, (see
for
information on variation over voltage and temperature).
In addition, a calibration instruction is programmed into
the last address of memory, which contains the
calibration value for the internal RC oscillator. This
location is always non-code protected, regardless of
the code-protect settings. This value is programmed as
a MOVLW
XX
instruction where XX is the calibration
value, and is placed at the Reset vector. This will load
the W register with the calibration value upon Reset
and the PC will then roll over to the users program at
address 0x000. The user then has the option of writing
the value to the OSCCAL Register (05h) or ignoring it.
OSCCAL, when written to with the calibration value, will
“trim” the internal oscillator to remove process variation
from the oscillator frequency.
For the MCV14A device, only bits <7:1> of OSCCAL
are used for calibration. See Register 3-3 for more
information.
VDD
REXT
CEXT
VSS
OSC1
Internal
clock
N
FOSC/4
OSC2/CLKOUT
MCV14A
Note:
Erasing the device will also erase the
pre-programmed internal calibration value
for the internal oscillator. The calibration
value must be read prior to erasing the
part so it can be reprogrammed correctly
later.
Note:
The bit 0 of the OSCCAL register is
unimplemented and should be written as
‘0’
when
modifying
OSCCAL
for
compatibility with future devices.
相關PDF資料
PDF描述
MCV14A-I/SL 8-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDSO14
MCV18ET-I/SO FLASH, 20 MHz, RISC MICROCONTROLLER, PDSO18
MCV18E-I/P 32-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDIP18
MD8086-2/B 16-BIT, 8 MHz, MICROPROCESSOR, CDIP40
MD80C154-12/883D 8-BIT, 12 MHz, MICROCONTROLLER, CDIP40
相關代理商/技術參數(shù)
參數(shù)描述
MCV15/10-GF-381 制造商:Phoenix Contact 功能描述:HEADER PCB VERTICAL 3.81MM 10WAY
MCV15/2-GF-381 制造商:Phoenix Contact 功能描述:HEADER PCB VERTICAL 3.81MM 2WAY
MCV15/3-GF-381 制造商:Phoenix Contact 功能描述:HEADER PCB VERTICAL 3.81MM 3WAY
MCV15/4-GF-381 制造商:Phoenix Contact 功能描述:HEADER PCB VERTICAL 3.81MM 4WAY
MCV15/5-GF-381 制造商:Phoenix Contact 功能描述:HEADER PCB VERTICAL 3.81MM 5WAY
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*