- 您现在的位置：买卖IC网 > PDF目录11834 > XR88C681J-F (Exar Corporation)IC UART CMOS DUAL 44PLCC PDF资料下载
参数资料
| 型号： | XR88C681J-F |
| 厂商： | Exar Corporation |
| 文件页数： | 12/101页 |
| 文件大小： | 0K |
| 描述： | IC UART CMOS DUAL 44PLCC |
| 标准包装： | 27 |
| 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： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC（16.59x16.59） |
| 包装： | 管件 |
| 其它名称： | 1016-1329 |
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页当前第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
18
Rev. 2.11
Bit 7
Bit 6
Bit 5
Bit 4
Description
1
0
Set Standby Mode (Channel A).
When this com-
mand is invoked via the Channel A Command Regis-
ter, power is removed from each of the transmitters,
receivers, counter/timer and additional circuits to
place the DUART in the standby (or lower power)
mode.
Please note that this command effects the
operation of the entire chip. Normal operation is re-
stored by a hardware reset or by invoking the “SET
ACTIVE MODE” command.
Reset IUS Latch (Channel B).
When this command
is invoked via the Channel B Command Register,
and the DUART is operating in Z-mode, it causes
the Interrupt-Under-Service (IUS) latch to be reset.
This, in turn, will cause the IEO output to toggle
“high”.
1
0
1
Set Active Mode (Channel A).
When this com-
mand is invoked via the Channel A Command Regis-
ter, the DUART is removed from the Standby Mode
and resumes normal operation.
Set Z-Mode (Channel B).
When this command is
invoked via the Channel B Command Register, the
DUART is conditioned to operate in the Z-Mode. For
a detailed discussion of the DUART’s operation while
in the Z-Mode, Please see
Section C.6.2. (Not avail-
able for the 28 pin DIP packaged devices)
1
0
Reserved.
1
Reserved.
Table 3. Miscellaneous Commands, Upper Nibble of all Command Registers,
Unless Otherwise Specified (Cont’d)
In addition to the commands which are available through
the command registers, the DUART also offers
“Address-Triggered” commands. These commands are
listed in
Table 1, “DUART PORT AND REGISTER
ADDRESSING”; and are further identified by being
“shaded” in
Table 1. Specifically, these commands are:
D
START COUNTER/TIMER COMMAND
D
STOP COUNTER/TIMER COMMAND
D
SET OUTPUT PORT BITS COMMAND
D
CLEAR OUTPUT PORT BITS COMMAND
Each of these commands are invoked by either reading or
writing data to their corresponding DUART addresses as
specified in
Table 1.
For Example:
The START COUNTER/TIMER COMMAND is invoked by
the procedure of reading DUART address 0E16. Please
note that this “Read Operation” will not result in placing
the contents of a DUART register on the data bus. The
only thing that will happen, in response to this procedure
is the Counter/Timer will initiate counting. For a detailed
discussion into the operation of the Counter/Timer, please
see
Section D.2.
Another example of an Address-Triggered commands is
the “SET OUTPUT PORT BITS” Command.
This
command is invoked by performing a write of data to
DUART address 0E16. When the user invokes this
command, he/she is setting certain bits (to “1”) within the
OPR (Output Port Register). All other bits, within the OPR
(not specified to be set), are not changed. The state of the
output port pins are complements of the individual bits
within the OPR. Hence, if OPR[0] is set to “1”, the state of
the corresponding output port pin, OP0, is now set to a
logic “0”. Consequently, one can think of the “SET
OUTPUT PORT BITS” command as the “CLEAR
OUTPUT PORT PINS” command. For a more detailed
discussion into the operation of the Output Ports, please
see
Section F.
相关PDF资料 |
PDF描述 |
|---|---|
| ST16C552AIJ68-F | IC UART FIFO 16B DUAL 68PLCC |
| MS27474T10A98P | CONN RCPT 6POS JAM NUT W/PINS |
| XR88C192IV-F | IC UART FIFO DUAL 44LQFP |
| MS27484T8F35PA | CONN PLUG 6POS STRAIGHT W/PINS |
| ST16C2550IJ44-F | IC UART FIFO 16B DUAL 44PLCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 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) |
| XR88C681P/28 | 制造商:Exar Corporation 功能描述: |
| XR88C681P/28-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 |
发布紧急采购，3分钟左右您将得到回复。