参数资料
| 型号： | XR88C681CP/40-F |
| 厂商： | Exar Corporation |
| 文件页数： | 87/101页 |
| 文件大小： | 0K |
| 描述： | IC UART CMOS DUAL 40PDIP |
| 标准包装： | 9 |
| 特点： | * |
| 通道数： | 2，DUART |
| FIFO's： | 1 字节，3 字节 |
| 电源电压： | 4.75 V ~ 5.25 V |
| 带并行端口： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 通孔 |
| 封装/外壳： | 40-DIP（0.600"，15.24mm） |
| 供应商设备封装： | 40-PDIP |
| 包装： | 管件 |
| 其它名称： | 1016-1328-5 |
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XR88C681
86
Rev. 2.11
An Address Byte, however, interrupts all “Slaves” so that
each can examine the received byte to test if it (the
individual slave device) is being addressed. The receiver
of the addressed slave will be enabled and will prepare for
reception of the data bytes that follows. The slaves that
were not addressed will leaves their Receivers disabled,
and will continue to ignore the data bytes that follows.
They will be interrupted again when the next address byte
is transmitted by the “Master Device”.
H.2.2 DUART Multi-Drop Operation
A given channel, within the DUART is programmed into
the Multi-Drop mode by setting MR1n[4:3] = “1, 1”. In this
mode, a transmitted character consists of a START bit,
the programmed number of data bits, the Address/Data
(A/D) flag bit; and the programmed STOP bit length. A/D
= 0 indicates that the character is data, while A/D = 1
identifies it as an address.
Transmitter Operation During Multi-Drop Mode
The user/CPU controls the state of the transmitted
character by programming MR1n[2] of the channel prior
to loading the data bits into the THR. Setting MR1n[2] =
“0” results in A/D = “0” and setting MR1n[2] = “1” results in
A/D = “1”.
Figure 48 presents a procedural flow diagram
for transmitting characters (Address or Data), while in the
Multi-Drop Mode.
START
Invoke the “RESET MR
POINTER” command.
(Write 1xh to appropriate
Command Register)
Set A/D Bit to “0”
(Write xxxxx0xx to MR1n
Register)
Transmit Address
Character to Slave Device.
(Write Character to THRn)
Invoke the “RESET MR
POINTER” command.
(Write 1xh to appropriate
Command Register)
Set A/D Bit to “1”
(Write xxxxx1xx to
MR1n Register)
Transmit Data Character
to Slave Device.
(Write Character to THRn)
No
Yes
Figure 48. A Flow Diargam Depicting a Procedure That Can Be Used to
Transmit Characters in the Multi-Drop Mode
Are there More
Data Characters
to Write to Active
Slave Device?
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR88C681J | 制造商:Exar Corporation 功能描述: |
| XR88C681J-F | 功能描述:UART 接口集成电路 0.5V-2V UART temp -45 to 85C RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR88C681JTR-F | 功能描述:UART 接口集成电路 Dual Channel UART RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| XR88C681MN-S0968 | 制造商:Exar Corporation 功能描述: |
| XR88C681N/40 | 制造商:EXAR 制造商全称:EXAR 功能描述:CMOS DUAL CHANNEL UART (DUART) |
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