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| 型號： | PIC24FJ128GA008-I/PT |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 135/258頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PIC MCU FLASH 128K 80TQFP |
| 產(chǎn)品培訓(xùn)模塊： | PIC24 Introduction Graphics LCD System and PIC24 Interface Asynchronous Stimulus |
| 特色產(chǎn)品： | PIC24FJ/33FJ MCUs & dsPIC? DSCs |
| 標(biāo)準(zhǔn)包裝： | 119 |
| 系列： | PIC® 24F |
| 核心處理器： | PIC |
| 芯體尺寸： | 16-位 |
| 速度： | 16MHz |
| 連通性： | I²C，PMP，SPI，UART/USART |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 69 |
| 程序存儲器容量： | 128KB（43K x 24） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 8K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 16x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 80-TQFP |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁面： | 648 (CN2011-ZH PDF) |
| 配用： | 876-1004-ND - PIC24 BREAKOUT BOARD DM240011-ND - KIT STARTER MPLAB FOR PIC24F MCU MA160011-ND - DAUGHTER BOARD PICDEM LCD 16F91X DM240001-ND - BOARD DEMO PIC24/DSPIC33/PIC32 AC164328-ND - MODULE SKT FOR 80TQFP |
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PIC24FJ128GA010 FAMILY
DS39747F-page 22
2005-2012 Microchip Technology Inc.
2.4.1
CONSIDERATIONS FOR CERAMIC
CAPACITORS
In recent years, large value, low-voltage, surface-mount
ceramic capacitors have become very cost effective in
sizes up to a few tens of microfarad. The low-ESR, small
physical size and other properties make ceramic
capacitors very attractive in many types of applications.
Ceramic capacitors are suitable for use with the inter-
nal voltage regulator of this microcontroller. However,
some care is needed in selecting the capacitor to
ensure that it maintains sufficient capacitance over the
intended operating range of the application.
Typical low-cost, 10
F ceramic capacitors are available
in X5R, X7R and Y5V dielectric ratings (other types are
also available, but are less common). The initial toler-
ance specifications for these types of capacitors are
often specified as ±10% to ±20% (X5R and X7R), or
-20%/+80% (Y5V). However, the effective capacitance
that these capacitors provide in an application circuit will
also vary based on additional factors, such as the
applied DC bias voltage and the temperature. The total
in-circuit tolerance is, therefore, much wider than the
initial tolerance specification.
The X5R and X7R capacitors typically exhibit satisfac-
tory temperature stability (ex: ±15% over a wide
temperature range, but consult the manufacturer's data
sheets for exact specifications). However, Y5V capaci-
tors typically have extreme temperature tolerance
specifications of +22%/-82%. Due to the extreme tem-
perature tolerance, a 10
F nominal rated Y5V type
capacitor may not deliver enough total capacitance to
meet minimum internal voltage regulator stability and
transient response requirements. Therefore, Y5V
capacitors are not recommended for use with the
internal regulator if the application must operate over a
wide temperature range.
In addition to temperature tolerance, the effective
capacitance of large value ceramic capacitors can vary
substantially, based on the amount of DC voltage
applied to the capacitor. This effect can be very signifi-
cant, but is often overlooked or is not always
documented.
Typical DC bias voltage vs. capacitance graph for X7R
FIGURE 2-4:
DC BIAS VOLTAGE vs.
CAPACITANCE
CHARACTERISTICS
When selecting a ceramic capacitor to be used with the
internal voltage regulator, it is suggested to select a
high-voltage rating, so that the operating voltage is a
small percentage of the maximum rated capacitor volt-
age. For example, choose a ceramic capacitor rated at
16V for the 2.5V or 1.8V core voltage. Suggested
capacitors are shown in Table 2-1.
2.5
ICSP Pins
The PGECx and PGEDx pins are used for In-Circuit
Serial Programming (ICSP) and debugging purposes.
It is recommended to keep the trace length between
the ICSP connector and the ICSP pins on the device as
short as possible. If the ICSP connector is expected to
experience an ESD event, a series resistor is recom-
mended, with the value in the range of a few tens of
ohms, not to exceed 100.
Pull-up resistors, series diodes and capacitors on the
PGECx and PGEDx pins are not recommended as they
will interfere with the programmer/debugger communi-
cations to the device. If such discrete components are
an application requirement, they should be removed
from the circuit during programming and debugging.
Alternatively, refer to the AC/DC characteristics and
timing requirements information in the respective
device Flash programming specification for information
on capacitive loading limits and pin input voltage high
(VIH) and input low (VIL) requirements.
For device emulation, ensure that the “Communication
Channel
Select”
(i.e.,
PGECx/PGEDx
pins),
programmed into the device, matches the physical
connections
for
the
ICSP
to
the
Microchip
debugger/emulator tool.
For
more
information
on
available
Microchip
development tools connection requirements, refer to
.
-80
-70
-60
-50
-40
-30
-20
-10
0
10
5
101112
13
1415
16
17
DC Bias Voltage (VDC)
Capac
it
a
nce
Change
(
%
)
01
23
4
6
7
8
9
16V Capacitor
10V Capacitor
6.3V Capacitor
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC24FJ128GA008T-I/PF | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:64/80/100-Pin General Purpose, 16-Bit Flash Microcontrollers |
| PIC24FJ128GA008T-I/PT | 功能描述:16位微控制器 - MCU 128KB 69I/O RoHS:否 制造商:Texas Instruments 核心:RISC 處理器系列:MSP430FR572x 數(shù)據(jù)總線寬度:16 bit 最大時鐘頻率:24 MHz 程序存儲器大小:8 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:VQFN-40 安裝風(fēng)格:SMD/SMT |
| PIC24FJ128GA010 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:General Purpose, 16-Bit Flash Microcontrollers |
| PIC24FJ128GA010_09 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:64/80/100-Pin General Purpose, 16-Bit Flash Microcontrollers |
| PIC24FJ128GA010_12 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:64/80/100-Pin, General Purpose, 16-Bit Flash Microcontrollers |
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