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| 型號： | MCP2122-E/SN |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 34/38頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ENCODER/DECODER IRDA 8SOIC |
| 標準包裝： | 100 |
| 類型： | 紅外線編碼器/解碼器 |
| 應(yīng)用： | 數(shù)據(jù)記錄，數(shù)據(jù)交換 |
| 電壓 - 電源，模擬： | 1.8 V ~ 5.5 V |
| 電壓 - 電源，數(shù)字： | 1.8 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOICN |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 684 (CN2011-ZH PDF) |
| 配用： | MCP212XDM-ND - BOARD DEVELOPMENT IRDA |
| 其它名稱： | MCP2122-E/SNG MCP2122-E/SNG-ND |
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2007 Microchip Technology Inc.
Preliminary
DS21894C-page 5
MCP2122
2.0
DEVICE OPERATION
The MCP2122 is a low-cost infrared encoder/decoder.
The baud rate is the same for the host UART and IR
interfaces and is determined by the frequency of the
16XCLK signal, with a maximum baud rate of
115.2 Kbaud.
The MCP2122 is made up of these functional modules:
Clock Driver (16XCLK)
Reset
IR Encoder/Decoder
- IrDA Standard Encoder
- IrDA Standard Decoder
The 16XCLK circuit allows a clock input to provide the
device clock.
The Reset circuit supports an external reset signal.
The IR Encoder logic takes a data bit and converts it to
the IrDA standard signal according to the IrDA standard
Physical Layer specification, while the IR Decoder
logic takes the IrDA standard signal and converts it to
8-bit data bytes.
2.1
Power-up
As the device is powered up, there will be a voltage
range in which the device will not operate properly. The
device should be reset once it has entered the normal
operating range (from an out-of-voltage condition). The
RESET pin may then be forced high.
Other device operating parameters (such as frequency,
temperature, etc.) must also be within their operating
ranges when the device exits reset. Otherwise, the
device may not function as desired.
2.2
Device Reset
The MCP2122 is forced into the known state (RESET)
when the RESET pin is in the low state. Once the
RESET pin is brought to a high state, the device begins
normal operation (if the device operating parameters
are met). Table 2-1 shows the states of the output pins
while the device is in reset (RESET = Low). Table 2-2
shows the state of the output pins once the device exits
reset, RESET = L
→H (device in Normal Operation
mode).
The MCP2122 has a RESET noise filter in the RESET
input signal path. The filter will detect and ignore small
pulses.
Using the RESET pin to enter a low-power state is
discussed in Section 2.9 “Minimizing Power”.
TABLE 2-1:
DEFAULT OUTPUT PIN
STATES IN DEVICE RESET
TABLE 2-2:
DEFAULT OUTPUT PIN
STATES AFTER DEVICE
RESET (RESET = L
→H)
2.3
Decoupling
It is highly recommended that the MCP2122 have a
decoupling capacitor (CBYP). A 0.01 F capacitor is
recommended as a starting value, but an evaluation of
the best value for your circuit/layout should be
performed. Place this decoupling capacitor (CBYP) as
close to the MCP2122 as possible (see Figure 2-1).
FIGURE 2-1:
DEVICE DECOUPLING
Input Pin
Output Pin
State
Comments
Name
State
RX
TXIR
RESET
L
H
L
Device in Reset mode
Input Pin
Output Pin
State
Comments
Name State
RX
TXIR
TX
L
—
L
→H
→L
After 7 - 8 16XCLK
pulses, the TXIR pin
will pulse high.
H—
L
RXIR
L
H
→L
—
After 4 16XCLK pulses,
RX = L.
HH
—
VDD
(bypass
capacitor)
MCP2122
VDD
RESET
VSS
16XCLK
TX
RX
TXIR
RXIR
CBYP
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| MCP2122T-E/P | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:Infrared Encoder/Decoder |
| MCP2122T-E/SN | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 IrDA Encoder/Decoder RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| MCP2122T-E/SNG | 功能描述:編碼器、解碼器、復(fù)用器和解復(fù)用器 Extended Temp Range (-40 to 125C) RoHS:否 制造商:Micrel 產(chǎn)品:Multiplexers 邏輯系列:CMOS 位數(shù): 線路數(shù)量（輸入/輸出）:2 / 12 傳播延遲時間:350 ps, 400 ps 電源電壓-最大:2.625 V, 3.6 V 電源電壓-最小:2.375 V, 3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Tray |
| MCP212XDM | 功能描述:其他開發(fā)工具 MCP2120/22 Dev Board RoHS:否 制造商:Parallax 產(chǎn)品:ELEV-8 Hex Upgrade Kits 類型:Robotics 工具用于評估:ELEV-8 Quadcopter 工作電源電壓: |
| MCP212XEV-DB | 功能描述:子卡和OEM板 MCP212X Dev Dghtr Brd RoHS:否 制造商:BeagleBoard by CircuitCo 產(chǎn)品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
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