參數(shù)資料
型號(hào)： MCP2122T-E/SN
廠商： Microchip Technology
文件頁數(shù)： 23/38頁
文件大?。?/td> 0K
描述： IC ENCODER/DECODER IRDA 8SOIC
標(biāo)準(zhǔn)包裝： 1
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： 標(biāo)準(zhǔn)包裝
產(chǎn)品目錄頁面： 684 (CN2011-ZH PDF)
配用： MCP212XDM-ND - BOARD DEVELOPMENT IRDA
其它名稱： MCP2122T-E/SNDKR
2007 Microchip Technology Inc.
Preliminary
DS21894C-page 3
MCP2122
1.0
DEVICE OVERVIEW
The MCP2122 is a stand-alone IrDA standard encoder/
decoder device that is pinout-compatible with the
Agilent HSDL-7000 encoder/decoder.
The MCP2122 has two interfaces: the host UART
interface and the IR interface (see Figure 1-1). The host
UART interfaces to the UART of the Host Controller.
The Host Controller is the device in the embedded
system that transmits and receives the data. The IR
interface connects to an infrared (IR) optical transceiver
circuit that converts electrical pulses into IR light
(encode) and converts IR light into electrical pulses
(decode). This IR optical transceiver circuit could be
either a standard infrared optical transceiver (such as a
Vishay TFDU 4300) or it could be implemented with
discrete components. For additional information, please
refer to AN243, “Fundamentals of the Infrared Physical
Layer” (DS00243).
When the Host Controller transmits the UART format
data, the MCP2122 receives this UART data and
encodes (modulates) it bit by bit. This encoded data is
then output as electrical pulses to the IR transceiver.
The IR transceiver will then convert these electrical
pulses to IR light pulses.
The IR transceiver also receives IR light pulses (data),
which are outputted as electrical pulses. The MCP2122
decodes (demodulates) these electrical pulses, with
the data then being transmitted by the MCP2122
UART. This modulation/demodulation method is
performed in accordance with the IrDA standard.
Table 1-1 shows an overview of some of the device
features. Figure 1-1 shows a typical application block
diagram. Table 1-2 shows the pin definitions of the
MCP2122 during normal operation.
TABLE 1-1:
MCP2122 FEATURES
OVERVIEW
Infrared Technology Features:
Universal standard for connecting portable
computing devices
Effortless implementation
Economical alternative to other connectivity
solutions
Reliable, high-speed connection
Safe to use in any environment; can even be used
during air travel
Eliminates the hassle of cables
Allows PCs and non-PCs to communicate with
each other
Enhances mobility by allowing users to easily
connect
1.1
Applications
Some applications where an IR interface (MCP2122)
could be used include:
Data-Logging/Data Exchange
System Setup
System Diagnostic Read Out
Manufacturing Configuration
Host Controller Firmware Updates
System Control
FIGURE 1-1:
SYSTEM BLOCK DIAGRAM
Features
MCP2122
Serial Communications:
UART, IR
Baud Rate Selection:
16XCLK
Low-power Mode:
Yes
Packages:
8-pin PDIP
8-pin SOIC
Encode
Decode
TX
TXIR
RX
RXIR
RESET
MCP2122
PIC
SO
SI
TFDU 4300
UAR
T
TXD
RXD
Reset
Logic
Clock
Logic
16XCLK
Clock
Host UART
Interface
IR
Interface
Host Controller
Protocol Handler
Optical
Transceiver
(I/O)
MCU
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