- 您现在的位置：买卖IC网 > PDF目录11599 > MCP2140-I/SO (Microchip Technology)IC IRDA CONTROLLR DTE/DCE 18SOIC PDF资料下载
参数资料
| 型号： | MCP2140-I/SO |
| 厂商： | Microchip Technology |
| 文件页数： | 58/58页 |
| 文件大小： | 0K |
| 描述： | IC IRDA CONTROLLR DTE/DCE 18SOIC |
| 产品培训模块： | IrDA® Standard Protocol |
| 标准包装： | 42 |
| 控制器类型： | IRDA 标准协议栈控制器 |
| 接口： | UART |
| 电源电压： | 3 V ~ 5.5 V |
| 电流 - 电源： | 2.2mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 18-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 18-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 685 (CN2011-ZH PDF) |
| 配用： | MCP2140DM-TMPSNS-ND - BOARD DEMO FOR MCP2140 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页当前第58页
2003 Microchip Technology Inc.
Preliminary
DS21790A-page 9
MCP2140
2.4
Host UART Interface
The Host UART interface communicates with the Host
Controller. This interface has eight signals associated
with it: TX, RX, RTS, CTS, DSR, DTR, CD and RI. Sev-
eral of these signals are locally generated (not passed
over the IR interface). The Host UART is a half-duplex
interface, meaning that the system is either transmitting
or receiving, but not both simultaneously.
2.4.1
BAUD RATE
The baud rate for the MCP2140 serial port (the TX and
RX pins) is fixed at 9600 baud when the device
frequency is 7.3728 MHz.
2.4.2
TRANSMITTING
When the controller sends serial data to the MCP2140,
the controller’s baud rate is required to match the baud
rate of the MCP2140’s serial port.
2.4.3
RECEIVING
When the controller receives serial data from the
MCP2140, the controller’s baud rate is required to
match the baud rate of the MCP2140’s serial port.
2.4.4
HARDWARE HANDSHAKING
There are three Host UART signals used to control the
handshaking operation between the Host Controller
and the MCP2140. They are:
DSR
RTS
CTS
2.4.4.1
DSR
The DSR signal is used to indicate that a link has been
established between the MCP2140 and the Primary
Device. Please refer to Section 2.13, “How Devices
Connect”, for information on how devices connect.
2.4.4.2
RTS
The RTS signal indicates to the MCP2140 that the Host
Controller is ready to receive serial data. Once an IR
data packet has been received, the RTS signal will be
low for the received data to be transferred to the Host
Controller. If the RTS signal remains high, an IR link
timeout will occur and the MCP2140 will disconnect
from the Primary Device.
2.4.4.3
CTS
The MCP2140 generates the CTS signal locally due to
buffer limitations.
The MCP2140 uses a 64-byte buffer for incoming data
from the IR Host. Another 29-byte buffer is provided to
buffer data from the UART serial port. The MCP2140
can handle IR data and Host UART serial port data
simultaneously. A hardware handshaking pin (CTS) is
provided to inhibit the Host Controller from sending
serial data when the Host UART buffer is not available
(Figure 2-3). Figure 2-4 shows a flow chart for Host
UART flow control using the CTS signal.
FIGURE 2-3:
HOST UART CTS SIGNAL AND THE RECEIVE BUFFER
Note 1: The MCP2140 generates several non-
data signals locally.
2: The MCP2140 emulates a 3-wire serial
connection (TXD, RXD and GND). The
transceiver’s
Transmit
Data
(TXD),
Receive Data (RXD) signals, and the
state of the CD. RI and DTR input pins
are carried back and forth to the Primary
device.
3: The RTS and CTS signals are local
emulations.
Note:
When the CTS output signal goes high, the
UART FIFO will store up to 6 bytes. This is
to allow devices that have a slow response
time to a change on the CTS signal time to
stop sending additional data (such as a
modem).
CTS
Receive Buffer Empty
MCP2140 Can Receive Data Receive Buffer Has 22 Bytes,
Receive Buffer
Receive Buffer Empty
MCP2140 Can Receive Data
IR Data Packet Transmitted
Full (29 Bytes)
CTS Pin Driven High
IR Data Packet Starts Transmission
相关PDF资料 |
PDF描述 |
|---|---|
| ENC28J60T-I/SO | IC ETHERNET CTRLR W/SPI 28-SOIC |
| ENC28J60T-I/SS | IC ETHERNET CTLR SPI 28SSOP |
| GRM21BF51C225ZA01K | CAP CER 2.2UF 16V Y5V 0805 |
| GRM21BF51A225ZA01K | CAP CER 2.2UF 10V Y5V 0805 |
| MCP2140A-I/SS | IC IRDA CONTROLLR DTE/DCE 20SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP2140-ISS | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:IrDA㈢ Standard Protocol Stack Controller With Fixed 9600 Baud Communication Rate |
| MCP2140T-I/SO | 功能描述:网络控制器与处理器 IC 9600bd fixd spd IrDA RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCP2140T-I/SS | 功能描述:网络控制器与处理器 IC 9600bd fixd spd IrDA RoHS:否 制造商:Micrel 产品:Controller Area Network (CAN) 收发器数量: 数据速率: 电源电流（最大值）:595 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:PBGA-400 封装:Tray |
| MCP2140T-IP | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:IrDA㈢ Standard Protocol Stack Controller With Fixed 9600 Baud Communication Rate |
| MCP2140T-ISO | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:IrDA㈢ Standard Protocol Stack Controller With Fixed 9600 Baud Communication Rate |
发布紧急采购，3分钟左右您将得到回复。