- 您现在的位置：买卖IC网 > PDF目录11834 > XR88C681P/40-F (Exar Corporation)IC UART CMOS DUAL 40PDIP PDF资料下载
参数资料
| 型号： | XR88C681P/40-F |
| 厂商： | Exar Corporation |
| 文件页数： | 10/101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： | 1016-1640 XR88C681P/40-F-ND |
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页当前第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页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页
XR88C681
16
Rev. 2.11
appropriate data to the appropriate channel’s Command Register. Therefore, both Mode Registers, within a given
channel, have the same logical address. The features and functions of the DUART that are controlled by the Mode
Registers are discussed in detail in
Section G.3.
B.2 Command Decoding
Each channel is equipped with a Command Register. In general, the role of these Command Registers are to
enable/disable the Transmitter, enable/disable the Receiver, along with facilitating a series of other miscellaneous
commands. The bit format for each Command Register is presented herewith.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Miscellaneous Commands
Enable/Disable
Receiver
Enable/Disable
Transmitter
See Following Text
00 = No Change
01 = Enable Rx
10 = Disable Rx
11 = Not valid (do not use)
00 = No Change
01 = Enable Tx
10 = Disable Tx
11 = Not Valid (Do not use)
Table 2. (CRA, CRB) Bit Format for Command Registers of Channels A & B
The function of the lower nibble of the Command Registers is fairly straight-forward. This nibble is used to either enable
or disable the Transmitter and/or Receiver.
The upper nibble of the Command Register is used to invoke a series of miscellaneous commands.
Table 3 defines the
commands associated with the upper nibble of the Command Registers.
Please note that the upper nibble commands
116 through B16 effects only the performance of Command Register’s Channel. However, commands C16 and D16
effects system (or chip) level operation.
Bit 7
Bit 6
Bit 5
Bit 4
Description
0
Null Command.
0
1
Reset MRn Pointer.
Causes the Channel’s MRn
pointer to point to MR1n.
0
1
0
Reset Receiver.
Reset the individual channel re-
ceiver as if a Hardware Reset has been applied.
The Receiver is disabled and the FIFO is flushed.
0
1
Reset Transmitter.
Resets the individual channel
transmitter as if a Hardware Reset had been applied.
The TXDn output is forced to a high level.
Table 3. Miscellaneous Commands, Upper Nibble of all Command Registers,
Unless Otherwise Specified (Cont’d Next Page)
相关PDF资料 |
PDF描述 |
|---|---|
| MS27472T16B8PA | CONN RCPT 8POS WALL MT W/PINS |
| MS27473E12F8PA | CONN PLUG 8POS STRAIGHT W/PINS |
| VI-JWH-IW-F3 | CONVERTER MOD DC/DC 52V 100W |
| VI-JWH-IW-F2 | CONVERTER MOD DC/DC 52V 100W |
| VI-JWH-IW-F1 | CONVERTER MOD DC/DC 52V 100W |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XR88C681XR101524CNN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| XR88C681XR101524M | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| XR88C681XR101524N | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| XR88C681XR101528CJJ | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
| XR88C681XR101528CNN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Telecommunication IC |
发布紧急采购，3分钟左右您将得到回复。