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| 型号： | MCP2140-I/SO |
| 厂商： | Microchip Technology |
| 文件页数： | 7/58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 |
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2003 Microchip Technology Inc.
Preliminary
DS21790A-page 15
MCP2140
2.10
Buffers and Throughput
The IR data rate of the MCP2140 is fixed at 9.6 kbaud.
The actual throughput will be less due to several fac-
tors. The most significant factors are under the control
of the developer. One factor beyond the control of the
designer is the overhead associated with the IrDA
standard. A throughput example is shown in Table 2-4.
Figure 2-9 shows the CTS waveform, what the state of
the buffers can be and the operation of the Host UART
and IR interfaces.
Figure 2-10 shows the screen-capture of a Host Con-
troller transmitting 240 bytes. Data is not transmitted
after CTS goes high (so only a maximum of 23 bytes of
the 29 byte buffer are utilized). Between data packets,
the CTS time can vary, depending on the Primary
Device (see blue circled CTS pulse in Figure 2-10).
TABLE 2-4:
THROUGHPUT
FIGURE 2-9:
HOST UART RECEIVE BUFFER AND CTS WAVEFORM
FIGURE 2-10:
HOST CONTROLLER TRANSMISSION OF A 240 BYTE PACKET
Bytes
Transferred
(3)
Bytes/
CTS Low
Time (S)
Effective
Baud Rate
240
23 (max) (1) 0.810133
2962 (1)
240
29
0.6500
3692 (2)
Note 1: Measured from Figure 2-10.
2: Interpolated from Figure 2-10.
3: 10 bits transferred for each byte.
Note:
IrDA throughput is based on many factors
associated with characteristics of the Pri-
mary and Secondary devices. These char-
acteristics may cause your throughput to
be more or less than is shown in Table 2-4.
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
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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 |
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