参数资料
| 型号： | XRT83L34IV |
| 厂商： | Exar Corporation |
| 文件页数： | 53/99页 |
| 文件大小： | 0K |
| 描述： | IC LIU T1/E1/J1 QUAD 128TQFP |
| 标准包装： | 72 |
| 类型： | 线路接口装置（LIU） |
| 驱动器/接收器数： | 4/4 |
| 规程： | T1，E1，J1 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 128-LQFP |
| 供应商设备封装： | 128-TQFP（14x20） |
| 包装： | 托盘 |
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页当前第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
xr
XRT83L34
QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR REV. 1.0.1
54
Asynchronous" Mode Read Operation.
THE INTEL-ASYNCHRONOUS WRITE CYCLE
If the Microprocessor Interface (of the XRT83L34 device) has been configured to operate in the Intel-
Asynchronous Mode, then the Microprocessor should do all of the following anytime that it wishes to write a
byte of data into a register within the XRT83L34 device.
1. Place the address of the "target" register (within the XRT83L34 device) on the Address Bus Input pins,
A[6:0].
2. While the Microprocessor is placing the address value on the Address bus, the Address Decoding circuitry
(within the user’s system) should assert the CS* (Chip Select) input pin of the XRT83L34 device by tog-
gling it "LOW". This action enables further communication between the Microprocessor and the XRT83L34
Microprocessor Interface.
3. Toggle the ALE/AS (Address Latch Enable) input pin "HIGH". This step enables the "Address Bus" input
drivers, within the Microprocessor Interface block of the XRT83L34 device.
4. After allowing the data on the Address Bus pins to settle (by waiting the appropriate "Address Set-up" time)
the Microprocessor should toggle the ALE/AS input pin "LOW". This step causes the XRT83L34 device to
"latch" the contents of the "Address Bus" into its internal circuitry. At this point, the address of the register
(within the XRT83L34 device) has now been selected.
5. Next, the Microprocessor should then place the byte that it intends to write into the "target" register (within
the XRT83L34 device), on the Bi-Direction Data Bus pins (D[7:0]).
6. Afterwards, the Microprocessor should then indicate that this current bus cycle is a "Write" Operation; by
toggling the WR*/R/W (Write Strobe) input pin "LOW". This active also enables the "Bi-Directional" Data
Bus Input Drivers of the XRT83L34 device. At this point, the "Bi-Directional" data bus input drivers will pro-
ceed to drive the contents (currently residing on the Bi-Directional Data Bus into the register that corre-
sponds with the "latched" address.
7. Immediately after the Microprocessor toggles the "Write Strobe" (WR*/R/W*) signal "LOW" the XRT83L34
device will continue to drive the "RDY*/DTACK*" output pin "high". The XRT83L34 device does this in
order to inform the Microprocessor that the data (to be written into the "target" address location, within the
XRT83L34 device) is "NOT READY" to be latched into the Microprocessor Interface block circuitry (within
FIGURE 25. ILLLUSTRATION OF AN INTEL-ASYNCHRONOUS MODE READ OPERATION
ALE/AS
RD*/DS*
A[6:0]
CS*
D[7:0]
RDY/DTACK*
Not Valid
Valid Data
Address of Target Register
WR*/R/W*
Microprocessor places “target”
Address value on A[6:0]
Address Decoding
Circuitry asserts
CS*
RDY* toggles “low” to indicate that
Valid data can be read from D[7:0]
Read Operation begins
Here
RDY* toggle “high”
after Completion
Of Read Operation
Read Operation is
Terminated Here
Microprocessor Interface latches contents on
A[6:0] upon falling edge of ALE
相关PDF资料 |
PDF描述 |
|---|---|
| MS27508E10F98SC | CONN RCPT 6POS BOX MNT W/SCKT |
| VI-21W-MX-F1 | CONVERTER MOD DC/DC 5.5V 75W |
| MS27468T15A97P | CONN RCPT 12POS JAM NUT W/PINS |
| MS27508E10B98SB | CONN RCPT 6POS BOX MNT W/SCKT |
| IDT72V243L7-5BCI | IC FIFO 2048X18 7-5NS 100BGA |
相关代理商/技术参数 |
参数描述 |
|---|---|
| XRT83L34IV-F | 功能描述:网络控制器与处理器 IC 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 |
| XRT83L34IVTR | 功能描述:外围驱动器与原件 - PCI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| XRT83L34IVTR-F | 功能描述:外围驱动器与原件 - PCI RoHS:否 制造商:PLX Technology 工作电源电压: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:FCBGA-1156 封装:Tray |
| XRT83L38 | 制造商:EXAR 制造商全称:EXAR 功能描述:OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
| XRT83L38_07 | 制造商:EXAR 制造商全称:EXAR 功能描述:OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR |
发布紧急采购，3分钟左右您将得到回复。